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-rw-r--r--Makefile2
-rw-r--r--constants/pokemon_constants.asm38
-rw-r--r--data/collision.asm24
-rwxr-xr-xdata/sgb_packets.asm400
-rw-r--r--engine/joypad.asm51
-rwxr-xr-xengine/palettes.asm30
-rw-r--r--home.asm5173
-rw-r--r--home/audio.asm183
-rw-r--r--home/fade.asm73
-rw-r--r--home/init.asm139
-rw-r--r--home/joypad.asm39
-rw-r--r--home/overworld.asm2419
-rw-r--r--home/pic.asm591
-rw-r--r--home/predef.asm50
-rw-r--r--home/text.asm738
-rw-r--r--home/vblank.asm105
-rw-r--r--home/vcopy.asm450
-rwxr-xr-xmain.asm106
18 files changed, 5384 insertions, 5227 deletions
diff --git a/Makefile b/Makefile
index 4dc35a7a..312f7787 100644
--- a/Makefile
+++ b/Makefile
@@ -50,7 +50,7 @@ $(all_obj): $$*.tx $$(patsubst %.asm, %.tx, $$($$*_dep))
@$(gfx) 2bpp $(2bppq); $(eval 2bppq :=)
@$(gfx) 1bpp $(1bppq); $(eval 1bppq :=)
@$(pic) compress $(picq); $(eval picq :=)
- rgbasm -o $@ $*.tx
+ rgbasm -h -o $@ $*.tx
link := rgblink -n $*.sym -m $*.map
diff --git a/constants/pokemon_constants.asm b/constants/pokemon_constants.asm
index af74e8f4..2ed03338 100644
--- a/constants/pokemon_constants.asm
+++ b/constants/pokemon_constants.asm
@@ -28,6 +28,8 @@ STARYU EQU $1B
BLASTOISE EQU $1C
PINSIR EQU $1D
TANGELA EQU $1E
+
+
GROWLITHE EQU $21
ONIX EQU $22
FEAROW EQU $23
@@ -45,17 +47,26 @@ PARASECT EQU $2E
PSYDUCK EQU $2F
DROWZEE EQU $30
GOLEM EQU $31
+
MAGMAR EQU $33
+
ELECTABUZZ EQU $35
MAGNETON EQU $36
KOFFING EQU $37
+
MANKEY EQU $39
SEEL EQU $3A
DIGLETT EQU $3B
TAUROS EQU $3C
+
+
+
FARFETCH_D EQU $40
VENONAT EQU $41
DRAGONITE EQU $42
+
+
+
DODUO EQU $46
POLIWAG EQU $47
JYNX EQU $48
@@ -65,16 +76,23 @@ ZAPDOS EQU $4B
DITTO EQU $4C
MEOWTH EQU $4D
KRABBY EQU $4E
+
+
+
VULPIX EQU $52
NINETALES EQU $53
PIKACHU EQU $54
RAICHU EQU $55
+
+
DRATINI EQU $58
DRAGONAIR EQU $59
KABUTO EQU $5A
KABUTOPS EQU $5B
HORSEA EQU $5C
SEADRA EQU $5D
+
+
SANDSHREW EQU $60
SANDSLASH EQU $61
OMANYTE EQU $62
@@ -94,29 +112,38 @@ POLIWRATH EQU $6F
WEEDLE EQU $70
KAKUNA EQU $71
BEEDRILL EQU $72
+
DODRIO EQU $74
PRIMEAPE EQU $75
DUGTRIO EQU $76
VENOMOTH EQU $77
DEWGONG EQU $78
+
+
CATERPIE EQU $7B
METAPOD EQU $7C
BUTTERFREE EQU $7D
MACHAMP EQU $7E
+
GOLDUCK EQU $80
HYPNO EQU $81
GOLBAT EQU $82
MEWTWO EQU $83
SNORLAX EQU $84
MAGIKARP EQU $85
+
+
MUK EQU $88
+
KINGLER EQU $8A
CLOYSTER EQU $8B
+
ELECTRODE EQU $8D
CLEFABLE EQU $8E
WEEZING EQU $8F
PERSIAN EQU $90
MAROWAK EQU $91
+
HAUNTER EQU $93
ABRA EQU $94
ALAKAZAM EQU $95
@@ -126,8 +153,13 @@ STARMIE EQU $98
BULBASAUR EQU $99
VENUSAUR EQU $9A
TENTACRUEL EQU $9B
+
GOLDEEN EQU $9D
SEAKING EQU $9E
+
+
+
+
PONYTA EQU $A3
RAPIDASH EQU $A4
RATTATA EQU $A5
@@ -137,12 +169,16 @@ NIDORINA EQU $A8
GEODUDE EQU $A9
PORYGON EQU $AA
AERODACTYL EQU $AB
+
MAGNEMITE EQU $AD
+
+
CHARMANDER EQU $B0
SQUIRTLE EQU $B1
CHARMELEON EQU $B2
WARTORTLE EQU $B3
CHARIZARD EQU $B4
+
FOSSIL_KABUTOPS EQU $B6
FOSSIL_AERODACTYL EQU $B7
MON_GHOST EQU $B8
@@ -151,4 +187,4 @@ GLOOM EQU $BA
VILEPLUME EQU $BB
BELLSPROUT EQU $BC
WEEPINBELL EQU $BD
-VICTREEBEL EQU $BE \ No newline at end of file
+VICTREEBEL EQU $BE
diff --git a/data/collision.asm b/data/collision.asm
new file mode 100644
index 00000000..78579242
--- /dev/null
+++ b/data/collision.asm
@@ -0,0 +1,24 @@
+Underground_Coll:: INCBIN "gfx/tilesets/underground.tilecoll"
+Overworld_Coll:: INCBIN "gfx/tilesets/overworld.tilecoll"
+RedsHouse1_Coll::
+RedsHouse2_Coll:: INCBIN "gfx/tilesets/reds_house.tilecoll"
+Mart_Coll::
+Pokecenter_Coll:: INCBIN "gfx/tilesets/pokecenter.tilecoll"
+Dojo_Coll::
+Gym_Coll:: INCBIN "gfx/tilesets/gym.tilecoll"
+Forest_Coll:: INCBIN "gfx/tilesets/forest.tilecoll"
+House_Coll:: INCBIN "gfx/tilesets/house.tilecoll"
+ForestGate_Coll::
+Museum_Coll::
+Gate_Coll:: INCBIN "gfx/tilesets/gate.tilecoll"
+Ship_Coll:: INCBIN "gfx/tilesets/ship.tilecoll"
+ShipPort_Coll:: INCBIN "gfx/tilesets/ship_port.tilecoll"
+Cemetery_Coll:: INCBIN "gfx/tilesets/cemetery.tilecoll"
+Interior_Coll:: INCBIN "gfx/tilesets/interior.tilecoll"
+Cavern_Coll:: INCBIN "gfx/tilesets/cavern.tilecoll"
+Lobby_Coll:: INCBIN "gfx/tilesets/lobby.tilecoll"
+Mansion_Coll:: INCBIN "gfx/tilesets/mansion.tilecoll"
+Lab_Coll:: INCBIN "gfx/tilesets/lab.tilecoll"
+Club_Coll:: INCBIN "gfx/tilesets/club.tilecoll"
+Facility_Coll:: INCBIN "gfx/tilesets/facility.tilecoll"
+Plateau_Coll:: INCBIN "gfx/tilesets/plateau.tilecoll"
diff --git a/data/sgb_packets.asm b/data/sgb_packets.asm
index 92bea812..3e5e3f0b 100755
--- a/data/sgb_packets.asm
+++ b/data/sgb_packets.asm
@@ -1,142 +1,298 @@
+ATTR_BLK: MACRO
+; This is a command macro.
+; Use ATTR_BLK_DATA for data sets.
+ db ($4 << 3) + ((\1 * 6) / 16 + 1)
+ db \1
+ENDM
+ATTR_BLK_DATA: MACRO
+ db \1 ; which regions are affected
+ db \2 + (\3 << 2) + (\4 << 4) ; palette for each region
+ db \5, \6, \7, \8 ; x1, y1, x2, y2
+ENDM
+
+PAL_SET: MACRO
+ db ($a << 3) + 1
+ dw \1, \2, \3, \4
+ ds 7
+ENDM
+
+PAL_TRN: MACRO
+ db ($b<< 3) + 1
+ ds 15
+ENDM
+
+MLT_REQ: MACRO
+ db ($11 << 3) + 1
+ db \1 - 1
+ ds 14
+ENDM
+
+CHR_TRN: MACRO
+ db ($13 << 3) + 1
+ db \1 + (\2 << 1)
+ ds 14
+ENDM
+
+PCT_TRN: MACRO
+ db ($14 << 3) + 1
+ ds 15
+ENDM
+
+MASK_EN: MACRO
+ db ($17 << 3) + 1
+ db \1
+ ds 14
+ENDM
+
+DATA_SND: MACRO
+ db ($f << 3) + 1
+ dw \1 ; address
+ db \2 ; bank
+ db \3 ; length (1-11)
+ENDM
+
BlkPacket_WholeScreen: ; 7219e (1c:619e)
- db $21,$01,$03,$00,$00,$00,$13,$11,$00,$00,$00,$00,$00,$00,$00,$00
+ ATTR_BLK 1
+ ATTR_BLK_DATA %011, 0,0,0, 00,00, 19,17
+ ds 8
+
db $03,$00,$00,$13,$11,$00,$00
BlkPacket_Battle: ; 721b5 (1c:61b5)
- db $22,$05,$07,$0a,$00,$0c,$13,$11,$03,$05,$01,$00,$0a,$03,$03,$00
- db $0a,$07,$13,$0a,$03,$0a,$00,$04,$08,$0b,$03,$0f,$0b,$00,$13,$06
- db $03,$00,$00,$13,$0b,$00,$03,$00,$0c,$13,$11,$02,$03,$01,$00,$0a
- db $03,$01,$03,$0a,$08,$13,$0a,$00,$03,$00,$04,$08,$0b,$02,$03,$0b
- db $00,$13,$07,$03,$00
+ ATTR_BLK 5
+ ATTR_BLK_DATA %111, 2,2,0, 00,12, 19,17
+ ATTR_BLK_DATA %011, 1,1,0, 01,00, 10,03
+ ATTR_BLK_DATA %011, 0,0,0, 10,07, 19,10
+ ATTR_BLK_DATA %011, 2,2,0, 00,04, 08,11
+ ATTR_BLK_DATA %011, 3,3,0, 11,00, 19,06
+
+ db $03,$00,$00,$13,$0b,$00
+ db $03,$00,$0c,$13,$11,$02
+ db $03,$01,$00,$0a,$03,$01
+ db $03,$0a,$08,$13,$0a,$00
+ db $03,$00,$04,$08,$0b,$02
+ db $03,$0b,$00,$13,$07,$03
+ db $00
BlkPacket_StatusScreen: ; 721fa (1c:61fa)
- db $21,$01,$07,$05,$01,$00,$07,$06,$00,$00,$00,$00,$00,$00,$00,$00
- db $02,$00,$00,$11,$00,$03,$01,$00,$07,$06,$01,$03,$01,$07,$13,$11
- db $00,$03,$08,$00,$13,$06,$00,$00
+ ATTR_BLK 1
+ ATTR_BLK_DATA %111, 1,1,0, 01,00, 07,06
+ ds 8
+
+ db $02,$00,$00,$11,$00,$03
+ db $01,$00,$07,$06,$01,$03
+ db $01,$07,$13,$11,$00,$03
+ db $08,$00,$13,$06,$00,$00
BlkPacket_Pokedex: ; 72222 (1c:6222)
- db $21,$01,$07,$05,$01,$01,$08,$08,$00,$00,$00,$00,$00,$00,$00,$00
- db $02,$00,$00,$11,$00,$01,$00,$01,$13,$00,$03,$01,$01,$08,$08,$01
- db $03,$01,$09,$08,$11,$00,$03,$09,$01,$13,$11,$00,$00
+ ATTR_BLK 1
+ ATTR_BLK_DATA %111, 1,1,0, 01,01, 08,08
+ ds 8
+
+ db $02,$00,$00,$11,$00,$01
+ db $00,$01,$13,$00,$03,$01
+ db $01,$08,$08,$01,$03,$01
+ db $09,$08,$11,$00,$03,$09
+ db $01,$13,$11,$00,$00
BlkPacket_Slots: ; 7224f (1c:624f)
- db $22,$05,$03,$05,$00,$00,$13,$0b,$03,$0a,$00,$04,$13,$09,$02,$0f
- db $00,$06,$13,$07,$03,$00,$04,$04,$0f,$09,$03,$00,$00,$0c,$13,$11
- db $03,$00,$00,$13,$0b,$01,$03,$00,$04,$13,$09,$02,$03,$00,$06,$13
- db $07,$03,$03,$04,$04,$0f,$09,$00,$03,$00,$0c,$13,$11,$00,$00
+ ATTR_BLK 5
+ ATTR_BLK_DATA %011, 1,1,0, 00,00, 19,11
+ ATTR_BLK_DATA %011, 2,2,0, 00,04, 19,09
+ ATTR_BLK_DATA %010, 3,3,0, 00,06, 19,07
+ ATTR_BLK_DATA %011, 0,0,0, 04,04, 15,09
+ ATTR_BLK_DATA %011, 0,0,0, 00,12, 19,17
+
+ db $03,$00,$00,$13,$0b,$01
+ db $03,$00,$04,$13,$09,$02
+ db $03,$00,$06,$13,$07,$03
+ db $03,$04,$04,$0f,$09,$00
+ db $03,$00,$0c,$13,$11,$00
+ db $00
BlkPacket_Titlescreen: ; 7228e (1c:628e)
- db $22,$03,$03,$00,$00,$00,$13,$07,$02,$05,$00,$08,$13,$09,$03,$0a
- db $00,$0a,$13,$11,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
- db $03,$00,$00,$13,$07,$00,$03,$00,$08,$13,$09,$01,$03,$00,$0a,$13
- db $11,$02,$00
+ ATTR_BLK 3
+ ATTR_BLK_DATA %011, 0,0,0, 00,00, 19,07
+ ATTR_BLK_DATA %010, 1,1,0, 00,08, 19,09
+ ATTR_BLK_DATA %011, 2,2,0, 00,10, 19,17
+ ds 12
+
+ db $03,$00,$00,$13,$07,$00
+ db $03,$00,$08,$13,$09,$01
+ db $03,$00,$0a,$13,$11,$02
+ db $00
BlkPacket_NidorinoIntro: ; 722c1 (1c:62c1)
- db $22,$03,$03,$05,$00,$00,$13,$03,$03,$00,$00,$04,$13,$0d,$03,$05
- db $00,$0e,$13,$11,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
- db $03,$00,$00,$13,$03,$01,$03,$00,$04,$13,$0d,$00,$03,$00,$0e,$13
- db $11,$01,$00
+ ATTR_BLK 3
+ ATTR_BLK_DATA %011, 1,1,0, 00,00, 19,03
+ ATTR_BLK_DATA %011, 0,0,0, 00,04, 19,13
+ ATTR_BLK_DATA %011, 1,1,0, 00,14, 19,17
+ ds 12
+
+ db $03,$00,$00,$13,$03,$01
+ db $03,$00,$04,$13,$0d,$00
+ db $03,$00,$0e,$13,$11,$01
+ db $00
BlkPacket_PartyMenu: ; 722f4 (1c:62f4)
- db $23,$07,$06,$10,$01,$00,$02,$0c,$02,$00,$05,$01,$0b,$01,$02,$00
- db $05,$03,$0b,$03,$02,$00,$05,$05,$0b,$05,$02,$00,$05,$07,$0b,$07
- db $02,$00,$05,$09,$0b,$09,$02,$00,$05,$0b,$0b,$0b,$00,$00,$00,$00
- db $02,$00,$00,$11,$01,$03,$01,$00,$02,$0c,$00,$03,$01,$0d,$02,$11
- db $01,$03,$03,$00,$13,$11,$01,$03,$0c,$00,$12,$01,$00,$03,$0c,$02
- db $12,$03,$00,$03,$0c,$04,$12,$05,$00,$03,$0c,$06,$12,$07,$00,$03
- db $0c,$08,$12,$09,$00,$03,$0c,$0a,$12,$0b,$00,$00
+ ATTR_BLK 7
+ ATTR_BLK_DATA %110, 0,0,1, 01,00, 02,12
+ ATTR_BLK_DATA %010, 0,0,0, 05,01, 11,01
+ ATTR_BLK_DATA %010, 0,0,0, 05,03, 11,03
+ ATTR_BLK_DATA %010, 0,0,0, 05,05, 11,05
+ ATTR_BLK_DATA %010, 0,0,0, 05,07, 11,07
+ ATTR_BLK_DATA %010, 0,0,0, 05,09, 11,09
+ ATTR_BLK_DATA %010, 0,0,0, 05,11, 11,11
+ ds 4
+
+ db $02,$00,$00,$11,$01,$03
+ db $01,$00,$02,$0c,$00,$03
+ db $01,$0d,$02,$11,$01,$03
+ db $03,$00,$13,$11,$01,$03
+ db $0c,$00,$12,$01,$00,$03
+ db $0c,$02,$12,$03,$00,$03
+ db $0c,$04,$12,$05,$00,$03
+ db $0c,$06,$12,$07,$00,$03
+ db $0c,$08,$12,$09,$00,$03
+ db $0c,$0a,$12,$0b,$00,$00
BlkPacket_TrainerCard: ; 72360 (1c:6360)
- db $24,$0a,$02,$00,$03,$0c,$04,$0d,$02,$05,$07,$0c,$08,$0d,$02,$0f
- db $0b,$0c,$0c,$0d,$02,$0a,$10,$0b,$11,$0c,$02,$05,$0e,$0d,$0f,$0e
- db $02,$0f,$10,$0d,$11,$0e,$02,$0a,$03,$0f,$04,$10,$02,$0f,$07,$0f
- db $08,$10,$02,$0a,$0b,$0f,$0c,$10,$02,$05,$0f,$0f,$10,$10,$00,$00
- db $03,$03,$0c,$04,$0d,$00,$03,$07,$0c,$08,$0d,$01,$03,$0b,$0c,$0c
- db $0d,$03,$03,$10,$0b,$11,$0c,$02,$03,$0e,$0d,$0f,$0e,$01,$03,$10
- db $0d,$11,$0e,$03,$03,$03,$0f,$04,$10,$02,$03,$07,$0f,$08,$10,$03
- db $03,$0b,$0f,$0c,$10,$02,$03,$0f,$0f,$10,$10,$01,$00
+ ATTR_BLK 10
+ ATTR_BLK_DATA %010, 0,0,0, 03,12, 04,13
+ ATTR_BLK_DATA %010, 1,1,0, 07,12, 08,13
+ ATTR_BLK_DATA %010, 3,3,0, 11,12, 12,13
+ ATTR_BLK_DATA %010, 2,2,0, 16,11, 17,12
+ ATTR_BLK_DATA %010, 1,1,0, 14,13, 15,14
+ ATTR_BLK_DATA %010, 3,3,0, 16,13, 17,14
+ ATTR_BLK_DATA %010, 2,2,0, 03,15, 04,16
+ ATTR_BLK_DATA %010, 3,3,0, 07,15, 08,16
+ ATTR_BLK_DATA %010, 2,2,0, 11,15, 12,16
+ ATTR_BLK_DATA %010, 1,1,0, 15,15, 16,16
+ ds 2
+
+ db $03,$03,$0c,$04,$0d,$00
+ db $03,$07,$0c,$08,$0d,$01
+ db $03,$0b,$0c,$0c,$0d,$03
+ db $03,$10,$0b,$11,$0c,$02
+ db $03,$0e,$0d,$0f,$0e,$01
+ db $03,$10,$0d,$11,$0e,$03
+ db $03,$03,$0f,$04,$10,$02
+ db $03,$07,$0f,$08,$10,$03
+ db $03,$0b,$0f,$0c,$10,$02
+ db $03,$0f,$0f,$10,$10,$01
+ db $00
BlkPacket_GameFreakIntro: ; 723dd (1c:63dd)
- db $22,$03,$07,$05,$05,$0b,$07,$0d,$02,$0a,$08,$0b,$09,$0d,$03,$0f
- db $0c,$0b,$0e,$0d,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
- db $03,$00,$00,$13,$0a,$00,$03,$00,$0b,$04,$0d,$00,$03,$05,$0b,$07
- db $0d,$01,$03,$08,$0b,$13,$0d,$00,$03,$00,$0e,$13,$11,$00,$03,$08
- db $0b,$09,$0d,$02,$03,$0c,$0b,$0e,$0d,$03,$00
-
-PalPacket_Empty: ; 72428 (1c:6428)
- db $51,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_PartyMenu: ; 72438 (1c:6438)
- db $51,PAL_MEWMON,$00,PAL_GREENBAR,$00,PAL_YELLOWBAR,$00,PAL_REDBAR,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_Black: ; 72448 (1c:6448)
- db $51,PAL_BLACK,$00,PAL_BLACK,$00,PAL_BLACK,$00,PAL_BLACK,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_TownMap: ; 72458 (1c:6458)
- db $51,PAL_TOWNMAP,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_Pokedex: ; 72468 (1c:6468)
- db $51,PAL_BROWNMON,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_Slots: ; 72478 (1c:6478)
- db $51,PAL_SLOTS1,$00,PAL_SLOTS2,$00,PAL_SLOTS3,$00,PAL_SLOTS4,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_Titlescreen: ; 72488 (1c:6488)
- db $51,PAL_LOGO2,$00,PAL_LOGO1,$00,PAL_MEWMON,$00,PAL_PURPLEMON,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_TrainerCard: ; 72498 (1c:6498)
- db $51,PAL_MEWMON,$00,PAL_BADGE,$00,PAL_REDMON,$00,PAL_YELLOWMON,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_Generic: ; 724a8 (1c:64a8)
- db $51,PAL_MEWMON,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_NidorinoIntro: ; 724b8 (1c:64b8)
- db $51,PAL_PURPLEMON,$00,PAL_BLACK,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_GameFreakIntro: ; 724c8 (1c:64c8)
- db $51,PAL_GAMEFREAK,$00,PAL_REDMON,$00,PAL_VIRIDIAN,$00,PAL_BLUEMON,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_724d8: ; 724d8 (1c:64d8)
- db $59,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_724e8: ; 724e8 (1c:64e8)
- db $89,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_724f8: ; 724f8 (1c:64f8)
- db $89,$01,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_72508: ; 72508 (1c:6508)
- db $99,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_72518: ; 72518 (1c:6518)
- db $A1,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_72528: ; 72528 (1c:6528)
- db $B9,$01,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_72538: ; 72538 (1c:6538)
- db $B9,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_72548: ; 72548 (1c:6548)
- db $79,$5D,$08,$00,$0B,$8C,$D0,$F4,$60,$00,$00,$00,$00,$00,$00,$00
-
-PalPacket_72558: ; 72558 (1c:6558)
- db $79,$52,$08,$00,$0B,$A9,$E7,$9F,$01,$C0,$7E,$E8,$E8,$E8,$E8,$E0
-
-PalPacket_72568: ; 72568 (1c:6568)
- db $79,$47,$08,$00,$0B,$C4,$D0,$16,$A5,$CB,$C9,$05,$D0,$10,$A2,$28
-
-PalPacket_72578: ; 72578 (1c:6578)
- db $79,$3C,$08,$00,$0B,$F0,$12,$A5,$C9,$C9,$C8,$D0,$1C,$A5,$CA,$C9
-
-PalPacket_72588: ; 72588 (1c:6588)
- db $79,$31,$08,$00,$0B,$0C,$A5,$CA,$C9,$7E,$D0,$06,$A5,$CB,$C9,$7E
-
-PalPacket_72598: ; 72598 (1c:6598)
- db $79,$26,$08,$00,$0B,$39,$CD,$48,$0C,$D0,$34,$A5,$C9,$C9,$80,$D0
-
-PalPacket_725a8: ; 725a8 (1c:65a8)
- db $79,$1B,$08,$00,$0B,$EA,$EA,$EA,$EA,$EA,$A9,$01,$CD,$4F,$0C,$D0
-
-PalPacket_725b8: ; 725b8 (1c:65b8)
- db $79,$10,$08,$00,$0B,$4C,$20,$08,$EA,$EA,$EA,$EA,$EA,$60,$EA,$EA
+ ATTR_BLK 3
+ ATTR_BLK_DATA %111, 1,1,0, 05,11, 07,13
+ ATTR_BLK_DATA %010, 2,2,0, 08,11, 09,13
+ ATTR_BLK_DATA %011, 3,3,0, 12,11, 14,13
+ ds 12
+
+ db $03,$00,$00,$13,$0a,$00
+ db $03,$00,$0b,$04,$0d,$00
+ db $03,$05,$0b,$07,$0d,$01
+ db $03,$08,$0b,$13,$0d,$00
+ db $03,$00,$0e,$13,$11,$00
+ db $03,$08,$0b,$09,$0d,$02
+ db $03,$0c,$0b,$0e,$0d,$03
+ db $00
+
+
+PalPacket_Empty: PAL_SET 0, 0, 0, 0
+PalPacket_PartyMenu: PAL_SET PAL_MEWMON, PAL_GREENBAR, PAL_YELLOWBAR, PAL_REDBAR
+PalPacket_Black: PAL_SET PAL_BLACK, PAL_BLACK, PAL_BLACK, PAL_BLACK
+PalPacket_TownMap: PAL_SET PAL_TOWNMAP, 0, 0, 0
+PalPacket_Pokedex: PAL_SET PAL_BROWNMON, 0, 0, 0
+PalPacket_Slots: PAL_SET PAL_SLOTS1, PAL_SLOTS2, PAL_SLOTS3, PAL_SLOTS4
+PalPacket_Titlescreen: PAL_SET PAL_LOGO2, PAL_LOGO1, PAL_MEWMON, PAL_PURPLEMON
+PalPacket_TrainerCard: PAL_SET PAL_MEWMON, PAL_BADGE, PAL_REDMON, PAL_YELLOWMON
+PalPacket_Generic: PAL_SET PAL_MEWMON, 0, 0, 0
+PalPacket_NidorinoIntro: PAL_SET PAL_PURPLEMON, PAL_BLACK, 0, 0
+PalPacket_GameFreakIntro: PAL_SET PAL_GAMEFREAK, PAL_REDMON, PAL_VIRIDIAN, PAL_BLUEMON
+
+PalTrnPacket: PAL_TRN
+MltReq1Packet: MLT_REQ 1
+MltReq2Packet: MLT_REQ 2
+ChrTrnPacket: CHR_TRN 0, 0
+PctTrnPacket: PCT_TRN
+
+MaskEnFreezePacket: MASK_EN 1
+MaskEnCancelPacket: MASK_EN 0
+
+
+; These are DATA_SND packets containing SNES code.
+; This set of packets is found in several Japanese SGB-compatible titles.
+; It appears to be part of NCL's SGB devkit.
+
+DataSnd_72548: DATA_SND $85d, $0, 11
+ db $8C ; cpx #$8c (2)
+ db $D0, $F4 ; bne -$0c
+ db $60 ; rts
+ ds 7
+
+DataSnd_72558: DATA_SND $852, $0, 11
+ db $A9, $E7 ; lda #$e7
+ db $9F, $01, $C0, $7E ; sta $7ec001, x
+ db $E8 ; inx
+ db $E8 ; inx
+ db $E8 ; inx
+ db $E8 ; inx
+ db $E0 ; cpx #$8c (1)
+
+DataSnd_72568: DATA_SND $847, $0, 11
+ db $C4 ; cmp #$c4 (2)
+ db $D0, $16 ; bne +$16
+ db $A5 ; lda dp
+ db $CB ; wai
+ db $C9, $05 ; cmp #$05
+ db $D0, $10 ; bne +$10
+ db $A2, $28 ; ldx #$28
+
+DataSnd_72578: DATA_SND $83c, $0, 11
+ db $F0, $12 ; beq +$12
+ db $A5 ; lda dp
+ db $C9, $C9 ; cmp #$c9
+ db $C8 ; iny
+ db $D0, $1C ; bne +$1c
+ db $A5 ; lda dp
+ db $CA ; dex
+ db $C9 ; cmp #$c4 (1)
+
+DataSnd_72588: DATA_SND $831, $0, 11
+ dbw $0C, $CAA5 ; tsb $caa5
+ db $C9, $7E ; cmp #$7e
+ db $D0, $06 ; bne +$06
+ db $A5 ; lda dp
+ db $CB ; wai
+ db $C9, $7E ; cmp #$7e
+
+DataSnd_72598: DATA_SND $826, $0, 11
+ db $39 ; bne +$39 (2)
+ dbw $CD, $C48 ; cmp $c48
+ db $D0, $34 ; bne +$34
+ db $A5 ; lda dp
+ db $C9, $C9 ; cmp #$c9
+ db $80, $D0 ; bra -$30
+
+DataSnd_725a8: DATA_SND $81b, $0, 11
+ db $EA ; nop
+ db $EA ; nop
+ db $EA ; nop
+ db $EA ; nop
+ db $EA ; nop
+ ; $820:
+ db $A9,$01 ; lda #01
+ dbw $CD,$C4F ; cmp $c4f
+ db $D0 ; bne +$39 (1)
+
+DataSnd_725b8: DATA_SND $810, $0, 11
+ dbw $4C, $820 ; jmp $820
+ db $EA ; nop
+ db $EA ; nop
+ db $EA ; nop
+ db $EA ; nop
+ db $EA ; nop
+ db $60 ; rts
+ db $EA ; nop
+ db $EA ; nop
diff --git a/engine/joypad.asm b/engine/joypad.asm
new file mode 100644
index 00000000..d2ad1c31
--- /dev/null
+++ b/engine/joypad.asm
@@ -0,0 +1,51 @@
+_Joypad::
+ ld a, [hJoyInput]
+ cp A_BUTTON + B_BUTTON + SELECT + START ; soft reset
+ jp z, TrySoftReset
+ ld b, a
+ ld a, [hJoyHeldLast]
+ ld e, a
+ xor b
+ ld d, a
+ and e
+ ld [hJoyReleased], a
+ ld a, d
+ and b
+ ld [hJoyPressed], a
+ ld a, b
+ ld [hJoyHeldLast], a
+ ld a, [wd730]
+ bit 5, a
+ jr nz, DiscardButtonPresses
+ ld a, [hJoyHeldLast]
+ ld [hJoyHeld], a
+ ld a, [wJoyIgnore]
+ and a
+ ret z
+ cpl
+ ld b, a
+ ld a, [hJoyHeld]
+ and b
+ ld [hJoyHeld], a
+ ld a, [hJoyPressed]
+ and b
+ ld [hJoyPressed], a
+ ret
+
+DiscardButtonPresses:
+ xor a
+ ld [hJoyHeld], a
+ ld [hJoyPressed], a
+ ld [hJoyReleased], a
+ ret
+
+TrySoftReset:
+ call DelayFrame
+ ; reset joypad (to make sure the
+ ; player is really trying to reset)
+ ld a, $30
+ ld [rJOYP], a
+ ld hl, hSoftReset
+ dec [hl]
+ jp z, SoftReset
+ jp Joypad
diff --git a/engine/palettes.asm b/engine/palettes.asm
index 0a2db277..33f241d1 100755
--- a/engine/palettes.asm
+++ b/engine/palettes.asm
@@ -396,21 +396,21 @@ LoadSGBBorderAndPalettes: ; 7202b (1c:602b)
ei
ld a, $1
ld [wcf2d], a
- ld de, PalPacket_72508
+ ld de, ChrTrnPacket
ld hl, SGBBorderGraphics
call Func_7210b
xor a
ld [wcf2d], a
- ld de, PalPacket_72518
+ ld de, PctTrnPacket
ld hl, BorderPalettes
call Func_7210b
xor a
ld [wcf2d], a
- ld de, PalPacket_724d8
+ ld de, PalTrnPacket
ld hl, SuperPalettes
call Func_7210b
call ClearVram
- ld hl, PalPacket_72538
+ ld hl, MaskEnCancelPacket
jp SendSGBPacket
Func_72075: ; 72075 (1c:6075)
@@ -431,18 +431,18 @@ Func_72075: ; 72075 (1c:6075)
ret
PointerTable_72089: ; 72089 (1c:6089)
- dw PalPacket_72528
- dw PalPacket_72548
- dw PalPacket_72558
- dw PalPacket_72568
- dw PalPacket_72578
- dw PalPacket_72588
- dw PalPacket_72598
- dw PalPacket_725a8
- dw PalPacket_725b8
+ dw MaskEnFreezePacket
+ dw DataSnd_72548
+ dw DataSnd_72558
+ dw DataSnd_72568
+ dw DataSnd_72578
+ dw DataSnd_72588
+ dw DataSnd_72598
+ dw DataSnd_725a8
+ dw DataSnd_725b8
Func_7209b: ; 7209b (1c:609b)
- ld hl, PalPacket_724f8
+ ld hl, MltReq2Packet
di
call SendSGBPacket
ld a, $1
@@ -493,7 +493,7 @@ Func_7209b: ; 7209b (1c:609b)
ret
Func_72102: ; 72102 (1c:6102)
- ld hl, PalPacket_724e8
+ ld hl, MltReq1Packet
call SendSGBPacket
jp Wait7000
diff --git a/home.asm b/home.asm
index b13714fe..e3d4309b 100644
--- a/home.asm
+++ b/home.asm
@@ -124,2468 +124,11 @@ Start::
jp Init
-ReadJoypad::
-; Poll joypad input.
-; Unlike the hardware register, button
-; presses are indicated by a set bit.
-
- ld a, 1 << 5 ; select direction keys
- ld c, 0
-
- ld [rJOYP], a
- rept 6
- ld a, [rJOYP]
- endr
- cpl
- and %1111
- swap a
- ld b, a
-
- ld a, 1 << 4 ; select button keys
- ld [rJOYP], a
- rept 10
- ld a, [rJOYP]
- endr
- cpl
- and %1111
- or b
-
- ld [hJoyInput], a
-
- ld a, 1 << 4 + 1 << 5 ; deselect keys
- ld [rJOYP], a
- ret
-
-Joypad::
-; Update the joypad state variables:
-; [hJoyReleased] keys released since last time
-; [hJoyPressed] keys pressed since last time
-; [hJoyHeld] currently pressed keys
- homecall _Joypad
- ret
-
+INCLUDE "home/joypad.asm"
INCLUDE "data/map_header_pointers.asm"
-HandleMidJump::
-; Handle the player jumping down
-; a ledge in the overworld.
- ld b, BANK(_HandleMidJump)
- ld hl, _HandleMidJump
- jp Bankswitch
-
-EnterMap::
-; Load a new map.
- ld a, $ff
- ld [wJoyIgnore], a
- call LoadMapData
- callba Func_c335 ; initialize map variables
- ld hl, wd72c
- bit 0, [hl]
- jr z, .doNotCountSteps
- ld a, 3
- ld [wd13c], a ; some kind of step counter (counts up to 3 steps?)
-.doNotCountSteps
- ld hl, wd72e
- bit 5, [hl] ; did a battle happen immediately before this?
- res 5, [hl] ; unset the "battle just happened" flag
- call z, Func_12e7
- call nz, MapEntryAfterBattle
- ld hl, wd732
- ld a, [hl]
- and 1 << 4 | 1 << 3
- jr z, .didNotFlyOrTeleportIn
- res 3, [hl]
- callba Func_70510 ; display fly/teleport in graphical effect
- call UpdateSprites
-.didNotFlyOrTeleportIn
- callba CheckForceBikeOrSurf ; handle currents in SF islands and forced bike riding in cycling road
- ld hl, wd72d
- res 5, [hl]
- call UpdateSprites
- ld hl, wd126
- set 5, [hl]
- set 6, [hl]
- xor a
- ld [wJoyIgnore], a
-
-OverworldLoop::
- call DelayFrame
-OverworldLoopLessDelay::
- call DelayFrame
- call LoadGBPal
- ld a,[wd736]
- bit 6,a ; jumping down a ledge?
- call nz, HandleMidJump
- ld a,[wWalkCounter]
- and a
- jp nz,.moveAhead ; if the player sprite has not yet completed the walking animation
- call JoypadOverworld ; get joypad state (which is possibly simulated)
- callba SafariZoneCheck
- ld a,[wda46]
- and a
- jp nz,WarpFound2
- ld hl,wd72d
- bit 3,[hl]
- res 3,[hl]
- jp nz,WarpFound2
- ld a,[wd732]
- and a,$18
- jp nz,HandleFlyOrTeleportAway
- ld a,[W_CUROPPONENT]
- and a
- jp nz,.newBattle
- ld a,[wd730]
- bit 7,a ; are we simulating button presses?
- jr z,.notSimulating
- ld a,[hJoyHeld]
- jr .checkIfStartIsPressed
-.notSimulating
- ld a,[hJoyPressed]
-.checkIfStartIsPressed
- bit 3,a ; start button
- jr z,.startButtonNotPressed
-; if START is pressed
- xor a
- ld [$ff8c],a ; the $2920 ID for the start menu is 0
- jp .displayDialogue
-.startButtonNotPressed
- bit 0,a ; A button
- jp z,.checkIfDownButtonIsPressed
-; if A is pressed
- ld a,[wd730]
- bit 2,a
- jp nz,.noDirectionButtonsPressed
- call Func_30fd
- jr nz,.checkForOpponent
- call Func_3eb5 ; check for hidden items, PC's, etc.
- ld a,[$ffeb]
- and a
- jp z,OverworldLoop
- call IsSpriteOrSignInFrontOfPlayer ; check for sign or sprite in front of the player
- ld a,[$ff8c] ; $2920 ID for NPC/sign text, if any
- and a
- jp z,OverworldLoop
-.displayDialogue
- ld a,$35
- call Predef ; check what is in front of the player
- call UpdateSprites ; move sprites
- ld a,[wFlags_0xcd60]
- bit 2,a
- jr nz,.checkForOpponent
- bit 0,a
- jr nz,.checkForOpponent
- FuncCoord 8, 9
- ld a,[Coord]
- ld [wcf0e],a
- call DisplayTextID ; display either the start menu or the NPC/sign text
- ld a,[wcc47]
- and a
- jr z,.checkForOpponent
- dec a
- ld a,$00
- ld [wcc47],a
- jr z,.changeMap
- ld a,$52
- call Predef
- ld a,[W_CURMAP]
- ld [wd71a],a
- call Func_62ce
- ld a,[W_CURMAP]
- call SwitchToMapRomBank ; switch to the ROM bank of the current map
- ld hl,W_CURMAPTILESET
- set 7,[hl]
-.changeMap
- jp EnterMap
-.checkForOpponent
- ld a,[W_CUROPPONENT]
- and a
- jp nz,.newBattle
- jp OverworldLoop
-.noDirectionButtonsPressed
- ld hl,wFlags_0xcd60
- res 2,[hl]
- call UpdateSprites ; move sprites
- ld a,$01
- ld [wcc4b],a
- ld a,[wd528] ; the direction that was pressed last time
- and a
- jp z,OverworldLoop
-; if a direction was pressed last time
- ld [wd529],a ; save the last direction
- xor a
- ld [wd528],a ; zero the direction
- jp OverworldLoop
-.checkIfDownButtonIsPressed
- ld a,[hJoyHeld] ; current joypad state
- bit 7,a ; down button
- jr z,.checkIfUpButtonIsPressed
- ld a,$01
- ld [wSpriteStateData1 + 3],a
- ld a,$04
- jr .handleDirectionButtonPress
-.checkIfUpButtonIsPressed
- bit 6,a ; up button
- jr z,.checkIfLeftButtonIsPressed
- ld a,$ff
- ld [wSpriteStateData1 + 3],a
- ld a,$08
- jr .handleDirectionButtonPress
-.checkIfLeftButtonIsPressed
- bit 5,a ; left button
- jr z,.checkIfRightButtonIsPressed
- ld a,$ff
- ld [wSpriteStateData1 + 5],a
- ld a,$02
- jr .handleDirectionButtonPress
-.checkIfRightButtonIsPressed
- bit 4,a ; right button
- jr z,.noDirectionButtonsPressed
- ld a,$01
- ld [wSpriteStateData1 + 5],a
-.handleDirectionButtonPress
- ld [wd52a],a ; new direction
- ld a,[wd730]
- bit 7,a ; are we simulating button presses?
- jr nz,.noDirectionChange ; ignore direction changes if we are
- ld a,[wcc4b]
- and a
- jr z,.noDirectionChange
- ld a,[wd52a] ; new direction
- ld b,a
- ld a,[wd529] ; old direction
- cp b
- jr z,.noDirectionChange
-; the code below is strange
-; it computes whether or not the player did a 180 degree turn, but then overwrites the result
-; also, it does a seemingly pointless loop afterwards
- swap a ; put old direction in upper half
- or b ; put new direction in lower half
- cp a,$48 ; change dir from down to up
- jr nz,.notDownToUp
- ld a,$02
- ld [wd528],a
- jr .oddLoop
-.notDownToUp
- cp a,$84 ; change dir from up to down
- jr nz,.notUpToDown
- ld a,$01
- ld [wd528],a
- jr .oddLoop
-.notUpToDown
- cp a,$12 ; change dir from right to left
- jr nz,.notRightToLeft
- ld a,$04
- ld [wd528],a
- jr .oddLoop
-.notRightToLeft
- cp a,$21 ; change dir from left to right
- jr nz,.oddLoop
- ld a,$08
- ld [wd528],a
-.oddLoop
- ld hl,wFlags_0xcd60
- set 2,[hl]
- ld hl,wcc4b
- dec [hl]
- jr nz,.oddLoop
- ld a,[wd52a]
- ld [wd528],a
- call NewBattle
- jp c,.battleOccurred
- jp OverworldLoop
-.noDirectionChange
- ld a,[wd52a] ; current direction
- ld [wd528],a ; save direction
- call UpdateSprites ; move sprites
- ld a,[wd700]
- cp a,$02 ; surfing
- jr z,.surfing
-; not surfing
- call CollisionCheckOnLand
- jr nc,.noCollision
- push hl
- ld hl,wd736
- bit 2,[hl]
- pop hl
- jp z,OverworldLoop
- push hl
- call ExtraWarpCheck ; sets carry if there is a potential to warp
- pop hl
- jp c,CheckWarpsCollision
- jp OverworldLoop
-.surfing
- call CollisionCheckOnWater
- jp c,OverworldLoop
-.noCollision
- ld a,$08
- ld [wWalkCounter],a
- jr .moveAhead2
-.moveAhead
- ld a,[wd736]
- bit 7,a
- jr z,.noSpinning
- callba LoadSpinnerArrowTiles ; spin while moving
-.noSpinning
- call UpdateSprites ; move sprites
-.moveAhead2
- ld hl,wFlags_0xcd60
- res 2,[hl]
- ld a,[wd700]
- dec a ; riding a bike?
- jr nz,.normalPlayerSpriteAdvancement
- ld a,[wd736]
- bit 6,a ; jumping a ledge?
- jr nz,.normalPlayerSpriteAdvancement
- call BikeSpeedup ; if riding a bike and not jumping a ledge
-.normalPlayerSpriteAdvancement
- call AdvancePlayerSprite
- ld a,[wWalkCounter]
- and a
- jp nz,CheckMapConnections ; it seems like this check will never succeed (the other place where CheckMapConnections is run works)
-; walking animation finished
- ld a,[wd730]
- bit 7,a
- jr nz,.doneStepCounting ; if button presses are being simulated, don't count steps
-; step counting
- ld hl,wd13b ; step counter
- dec [hl]
- ld a,[wd72c]
- bit 0,a
- jr z,.doneStepCounting
- ld hl,wd13c
- dec [hl]
- jr nz,.doneStepCounting
- ld hl,wd72c
- res 0,[hl]
-.doneStepCounting
- ld a,[wd790]
- bit 7,a ; in the safari zone?
- jr z,.notSafariZone
- callba SafariZoneCheckSteps
- ld a,[wda46]
- and a
- jp nz,WarpFound2
-.notSafariZone
- ld a,[W_ISINBATTLE]
- and a
- jp nz,CheckWarpsNoCollision
- ld a,$13
- call Predef ; decrement HP of poisoned pokemon
- ld a,[wd12d]
- and a
- jp nz,HandleBlackOut ; if all pokemon fainted
-.newBattle
- call NewBattle
- ld hl,wd736
- res 2,[hl]
- jp nc,CheckWarpsNoCollision ; check for warps if there was no battle
-.battleOccurred
- ld hl,wd72d
- res 6,[hl]
- ld hl,W_FLAGS_D733
- res 3,[hl]
- ld hl,wd126
- set 5,[hl]
- set 6,[hl]
- xor a
- ld [hJoyHeld],a ; clear joypad state
- ld a,[W_CURMAP]
- cp a,CINNABAR_GYM
- jr nz,.notCinnabarGym
- ld hl,wd79b
- set 7,[hl]
-.notCinnabarGym
- ld hl,wd72e
- set 5,[hl]
- ld a,[W_CURMAP]
- cp a,OAKS_LAB
- jp z,.noFaintCheck
- callab AnyPlayerPokemonAliveCheck ; check if all the player's pokemon fainted
- ld a,d
- and a
- jr z,.allPokemonFainted
-.noFaintCheck
- ld c,$0a
- call DelayFrames
- jp EnterMap
-.allPokemonFainted
- ld a,$ff
- ld [W_ISINBATTLE],a
- call RunMapScript
- jp HandleBlackOut
-
-; function to determine if there will be a battle and execute it (either a trainer battle or wild battle)
-; sets carry if a battle occurred and unsets carry if not
-NewBattle:: ; 0683 (0:0683)
- ld a,[wd72d]
- bit 4,a
- jr nz,.noBattle
- call Func_30fd
- jr nz,.noBattle
- ld a,[wd72e]
- bit 4,a
- jr nz,.noBattle
- ld b, BANK(InitBattle)
- ld hl, InitBattle
- jp Bankswitch ; determines if a battle will occur and runs the battle if so
-.noBattle
- and a
- ret
-
-; function to make bikes twice as fast as walking
-BikeSpeedup:: ; 06a0 (0:06a0)
- ld a,[wcc57]
- and a
- ret nz
- ld a,[W_CURMAP]
- cp a,ROUTE_17 ; Cycling Road
- jr nz,.goFaster
- ld a,[hJoyHeld] ; current joypad state
- and a,%01110000 ; bit mask for up, left, right buttons
- ret nz
-.goFaster
- jp AdvancePlayerSprite
-
-; check if the player has stepped onto a warp after having not collided
-CheckWarpsNoCollision:: ; 06b4 (0:06b4)
- ld a,[wd3ae] ; number of warps
- and a
- jp z,CheckMapConnections
- ld a,[wd3ae] ; number of warps
- ld b,$00
- ld c,a
- ld a,[W_YCOORD]
- ld d,a
- ld a,[W_XCOORD]
- ld e,a
- ld hl,wd3af ; start of warp entries
-CheckWarpsNoCollisionLoop:: ; 06cc (0:06cc)
- ld a,[hli] ; check if the warp's Y position matches
- cp d
- jr nz,CheckWarpsNoCollisionRetry1
- ld a,[hli] ; check if the warp's X position matches
- cp e
- jr nz,CheckWarpsNoCollisionRetry2
-; if a match was found
- push hl
- push bc
- ld hl,wd736
- set 2,[hl]
- callba Func_c49d ; check if the player sprite is standing on a "door" tile
- pop bc
- pop hl
- jr c,WarpFound1 ; if it is, go to 0735
- push hl
- push bc
- call ExtraWarpCheck ; sets carry if the warp is confirmed
- pop bc
- pop hl
- jr nc,CheckWarpsNoCollisionRetry2
-; if the extra check passed
- ld a,[W_FLAGS_D733]
- bit 2,a
- jr nz,WarpFound1
- push de
- push bc
- call Joypad
- pop bc
- pop de
- ld a,[hJoyHeld] ; current joypad state
- and a,%11110000 ; bit mask for directional buttons
- jr z,CheckWarpsNoCollisionRetry2 ; if directional buttons aren't being pressed, do not pass through the warp
- jr WarpFound1
-
-; check if the player has stepped onto a warp after having collided
-CheckWarpsCollision:: ; 0706 (0:0706)
- ld a,[wd3ae] ; number of warps
- ld c,a
- ld hl,wd3af ; start of warp entries
-.loop
- ld a,[hli] ; Y coordinate of warp
- ld b,a
- ld a,[W_YCOORD]
- cp b
- jr nz,.retry1
- ld a,[hli] ; X coordinate of warp
- ld b,a
- ld a,[W_XCOORD]
- cp b
- jr nz,.retry2
- ld a,[hli]
- ld [wd42f],a ; save target warp ID
- ld a,[hl]
- ld [$ff8b],a ; save target map
- jr WarpFound2
-.retry1
- inc hl
-.retry2
- inc hl
- inc hl
- dec c
- jr nz,.loop
- jp OverworldLoop
-
-CheckWarpsNoCollisionRetry1:: ; 072f (0:072f)
- inc hl
-CheckWarpsNoCollisionRetry2:: ; 0730 (0:0730)
- inc hl
- inc hl
- jp ContinueCheckWarpsNoCollisionLoop
-
-WarpFound1:: ; 0735 (0:0735)
- ld a,[hli]
- ld [wd42f],a ; save target warp ID
- ld a,[hli]
- ld [$ff8b],a ; save target map
-
-WarpFound2:: ; 073c (0:073c)
- ld a,[wd3ae] ; number of warps
- sub c
- ld [wd73b],a ; save ID of used warp
- ld a,[W_CURMAP]
- ld [wd73c],a
- call CheckIfInOutsideMap
- jr nz,.indoorMaps
-; this is for handling "outside" maps that can't have the 0xFF destination map
- ld a,[W_CURMAP]
- ld [wLastMap],a
- ld a,[W_CURMAPWIDTH]
- ld [wd366],a
- ld a,[$ff8b] ; destination map number
- ld [W_CURMAP],a ; change current map to destination map
- cp a,ROCK_TUNNEL_1
- jr nz,.notRockTunnel
- ld a,$06
- ld [wd35d],a
- call GBFadeIn1
-.notRockTunnel
- call PlayMapChangeSound
- jr .done
-; for maps that can have the 0xFF destination map, which means to return to the outside map; not all these maps are necessarily indoors, though
-.indoorMaps
- ld a,[$ff8b] ; destination map
- cp a,$ff
- jr z,.goBackOutside
-; if not going back to the previous map
- ld [W_CURMAP],a ; current map number
- callba Func_70787 ; check if the warp was a Silph Co. teleporter
- ld a,[wcd5b]
- dec a
- jr nz,.notTeleporter
-; if it's a Silph Co. teleporter
- ld hl,wd732
- set 3,[hl]
- call DoFlyOrTeleportAwayGraphics
- jr .skipMapChangeSound
-.notTeleporter
- call PlayMapChangeSound
-.skipMapChangeSound
- ld hl,wd736
- res 0,[hl]
- res 1,[hl]
- jr .done
-.goBackOutside
- ld a,[wLastMap]
- ld [W_CURMAP],a
- call PlayMapChangeSound
- xor a
- ld [wd35d],a
-.done
- ld hl,wd736
- set 0,[hl]
- call Func_12da
- jp EnterMap
-
-ContinueCheckWarpsNoCollisionLoop:: ; 07b5 (0:07b5)
- inc b ; increment warp number
- dec c ; decrement number of warps
- jp nz,CheckWarpsNoCollisionLoop
-
-; if no matching warp was found
-CheckMapConnections:: ; 07ba (0:07ba)
-.checkWestMap
- ld a,[W_XCOORD]
- cp a,$ff
- jr nz,.checkEastMap
- ld a,[W_MAPCONN3PTR]
- ld [W_CURMAP],a
- ld a,[wd38f] ; new X coordinate upon entering west map
- ld [W_XCOORD],a
- ld a,[W_YCOORD]
- ld c,a
- ld a,[wd38e] ; Y adjustment upon entering west map
- add c
- ld c,a
- ld [W_YCOORD],a
- ld a,[wd390] ; pointer to upper left corner of map without adjustment for Y position
- ld l,a
- ld a,[wd391]
- ld h,a
- srl c
- jr z,.savePointer1
-.pointerAdjustmentLoop1
- ld a,[wd38d] ; width of connected map
- add a,$06
- ld e,a
- ld d,$00
- ld b,$00
- add hl,de
- dec c
- jr nz,.pointerAdjustmentLoop1
-.savePointer1
- ld a,l
- ld [wd35f],a ; pointer to upper left corner of current tile block map section
- ld a,h
- ld [wd360],a
- jp .loadNewMap
-.checkEastMap
- ld b,a
- ld a,[wd525] ; map width
- cp b
- jr nz,.checkNorthMap
- ld a,[W_MAPCONN4PTR]
- ld [W_CURMAP],a
- ld a,[wd39a] ; new X coordinate upon entering east map
- ld [W_XCOORD],a
- ld a,[W_YCOORD]
- ld c,a
- ld a,[wd399] ; Y adjustment upon entering east map
- add c
- ld c,a
- ld [W_YCOORD],a
- ld a,[wd39b] ; pointer to upper left corner of map without adjustment for Y position
- ld l,a
- ld a,[wd39c]
- ld h,a
- srl c
- jr z,.savePointer2
-.pointerAdjustmentLoop2
- ld a,[wd398]
- add a,$06
- ld e,a
- ld d,$00
- ld b,$00
- add hl,de
- dec c
- jr nz,.pointerAdjustmentLoop2
-.savePointer2
- ld a,l
- ld [wd35f],a ; pointer to upper left corner of current tile block map section
- ld a,h
- ld [wd360],a
- jp .loadNewMap
-.checkNorthMap
- ld a,[W_YCOORD]
- cp a,$ff
- jr nz,.checkSouthMap
- ld a,[W_MAPCONN1PTR]
- ld [W_CURMAP],a
- ld a,[wd378] ; new Y coordinate upon entering north map
- ld [W_YCOORD],a
- ld a,[W_XCOORD]
- ld c,a
- ld a,[wd379] ; X adjustment upon entering north map
- add c
- ld c,a
- ld [W_XCOORD],a
- ld a,[wd37a] ; pointer to upper left corner of map without adjustment for X position
- ld l,a
- ld a,[wd37b]
- ld h,a
- ld b,$00
- srl c
- add hl,bc
- ld a,l
- ld [wd35f],a ; pointer to upper left corner of current tile block map section
- ld a,h
- ld [wd360],a
- jp .loadNewMap
-.checkSouthMap
- ld b,a
- ld a,[wd524]
- cp b
- jr nz,.didNotEnterConnectedMap
- ld a,[W_MAPCONN2PTR]
- ld [W_CURMAP],a
- ld a,[wd383] ; new Y coordinate upon entering south map
- ld [W_YCOORD],a
- ld a,[W_XCOORD]
- ld c,a
- ld a,[wd384] ; X adjustment upon entering south map
- add c
- ld c,a
- ld [W_XCOORD],a
- ld a,[wd385] ; pointer to upper left corner of map without adjustment for X position
- ld l,a
- ld a,[wd386]
- ld h,a
- ld b,$00
- srl c
- add hl,bc
- ld a,l
- ld [wd35f],a ; pointer to upper left corner of current tile block map section
- ld a,h
- ld [wd360],a
-.loadNewMap ; load the connected map that was entered
- call LoadMapHeader
- call Func_2312 ; music
- ld b,$09
- call GoPAL_SET
-; Since the sprite set shouldn't change, this will just update VRAM slots at
-; $C2XE without loading any tile patterns.
- callba InitMapSprites
- call LoadTileBlockMap
- jp OverworldLoopLessDelay
-.didNotEnterConnectedMap
- jp OverworldLoop
-
-; function to play a sound when changing maps
-PlayMapChangeSound:: ; 08c9 (0:08c9)
- FuncCoord 8, 8
- ld a,[Coord] ; upper left tile of the 4x4 square the player's sprite is standing on
- cp a,$0b ; door tile in tileset 0
- jr nz,.didNotGoThroughDoor
- ld a,(SFX_02_57 - SFX_Headers_02) / 3
- jr .playSound
-.didNotGoThroughDoor
- ld a,(SFX_02_5c - SFX_Headers_02) / 3
-.playSound
- call PlaySound
- ld a,[wd35d]
- and a
- ret nz
- jp GBFadeIn1
-
-CheckIfInOutsideMap:: ; 08e1 (0:08e1)
-; If the player is in an outside map (a town or route), set the z flag
- ld a, [W_CURMAPTILESET]
- and a ; most towns/routes have tileset 0 (OVERWORLD)
- ret z
- cp PLATEAU ; Route 23 / Indigo Plateau
- ret
-
-; this function is an extra check that sometimes has to pass in order to warp, beyond just standing on a warp
-; the "sometimes" qualification is necessary because of CheckWarpsNoCollision's behavior
-; depending on the map, either "function 1" or "function 2" is used for the check
-; "function 1" passes when the player is at the edge of the map and is facing towards the outside of the map
-; "function 2" passes when the the tile in front of the player is among a certain set
-; sets carry if the check passes, otherwise clears carry
-ExtraWarpCheck:: ; 08e9 (0:08e9)
- ld a, [W_CURMAP]
- cp SS_ANNE_3
- jr z, .useFunction1
- cp ROCKET_HIDEOUT_1
- jr z, .useFunction2
- cp ROCKET_HIDEOUT_2
- jr z, .useFunction2
- cp ROCKET_HIDEOUT_4
- jr z, .useFunction2
- cp ROCK_TUNNEL_1
- jr z, .useFunction2
- ld a, [W_CURMAPTILESET]
- and a ; outside tileset (OVERWORLD)
- jr z, .useFunction2
- cp SHIP ; S.S. Anne tileset
- jr z, .useFunction2
- cp SHIP_PORT ; Vermilion Port tileset
- jr z, .useFunction2
- cp PLATEAU ; Indigo Plateau tileset
- jr z, .useFunction2
-.useFunction1
- ld hl, Func_c3ff
- jr .doBankswitch
-.useFunction2
- ld hl, Func_c44e
-.doBankswitch
- ld b, BANK(Func_c44e)
- jp Bankswitch
-
-MapEntryAfterBattle:: ; 091f (0:091f)
- callba Func_c35f ; function that appears to disable warp testing after collisions if the player is standing on a warp
- ld a,[wd35d]
- and a
- jp z,GBFadeIn2
- jp LoadGBPal
-
-HandleBlackOut::
-; For when all the player's pokemon faint.
-; Does not print the "blacked out" message.
-
- call GBFadeIn1
- ld a, $08
- call StopMusic
- ld hl, wd72e
- res 5, [hl]
- ld a, Bank(Func_40b0) ; also Bank(Func_62ce) and Bank(Func_5d5f)
- ld [H_LOADEDROMBANK], a
- ld [MBC3RomBank], a
- call Func_40b0
- call Func_62ce
- call Func_2312
- jp Func_5d5f
-
-StopMusic::
- ld [wMusicHeaderPointer], a
- ld a, $ff
- ld [wc0ee], a
- call PlaySound
-.wait
- ld a, [wMusicHeaderPointer]
- and a
- jr nz, .wait
- jp StopAllSounds
-
-HandleFlyOrTeleportAway::
- call UpdateSprites
- call Delay3
- xor a
- ld [wcf0b], a
- ld [wd700], a
- ld [W_ISINBATTLE], a
- ld [wd35d], a
- ld hl, wd732
- set 2, [hl]
- res 5, [hl]
- call DoFlyOrTeleportAwayGraphics
- ld a, Bank(Func_62ce)
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
- call Func_62ce
- jp Func_5d5f
-
-DoFlyOrTeleportAwayGraphics::
- ld b, BANK(_DoFlyOrTeleportAwayGraphics)
- ld hl, _DoFlyOrTeleportAwayGraphics
- jp Bankswitch
-
-LoadPlayerSpriteGraphics::
-; Load sprite graphics based on whether the player is standing, biking, or surfing.
-
- ; 0: standing
- ; 1: biking
- ; 2: surfing
-
- ld a, [wd700]
- dec a
- jr z, .ridingBike
-
- ld a, [$ffd7]
- and a
- jr nz, .determineGraphics
- jr .startWalking
-
-.ridingBike
- ; If the bike can't be used,
- ; start walking instead.
- call IsBikeRidingAllowed
- jr c, .determineGraphics
-
-.startWalking
- xor a
- ld [wd700], a
- ld [wd11a], a
- jp LoadWalkingPlayerSpriteGraphics
-
-.determineGraphics
- ld a, [wd700]
- and a
- jp z, LoadWalkingPlayerSpriteGraphics
- dec a
- jp z, LoadBikePlayerSpriteGraphics
- dec a
- jp z, LoadSurfingPlayerSpriteGraphics
- jp LoadWalkingPlayerSpriteGraphics
-
-IsBikeRidingAllowed::
-; The bike can be used on Route 23 and Indigo Plateau,
-; or maps with tilesets in BikeRidingTilesets.
-; Return carry if biking is allowed.
-
- ld a, [W_CURMAP]
- cp ROUTE_23
- jr z, .allowed
- cp INDIGO_PLATEAU
- jr z, .allowed
-
- ld a, [W_CURMAPTILESET]
- ld b, a
- ld hl, BikeRidingTilesets
-.loop
- ld a, [hli]
- cp b
- jr z, .allowed
- inc a
- jr nz, .loop
- and a
- ret
-
-.allowed
- scf
- ret
-
-INCLUDE "data/bike_riding_tilesets.asm"
-
-; load the tile pattern data of the current tileset into VRAM
-LoadTilesetTilePatternData:: ; 09e8 (0:09e8)
- ld a,[W_TILESETGFXPTR]
- ld l,a
- ld a,[W_TILESETGFXPTR + 1]
- ld h,a
- ld de,vTileset
- ld bc,$600
- ld a,[W_TILESETBANK]
- jp FarCopyData2
-
-; this loads the current maps complete tile map (which references blocks, not individual tiles) to C6E8
-; it can also load partial tile maps of connected maps into a border of length 3 around the current map
-LoadTileBlockMap:: ; 09fc (0:09fc)
-; fill C6E8-CBFB with the background tile
- ld hl,wOverworldMap
- ld a,[wd3ad] ; background tile number
- ld d,a
- ld bc,$0514
-.backgroundTileLoop
- ld a,d
- ld [hli],a
- dec bc
- ld a,c
- or b
- jr nz,.backgroundTileLoop
-; load tile map of current map (made of tile block IDs)
-; a 3-byte border at the edges of the map is kept so that there is space for map connections
- ld hl,wOverworldMap
- ld a,[W_CURMAPWIDTH]
- ld [$ff8c],a
- add a,$06 ; border (east and west)
- ld [$ff8b],a ; map width + border
- ld b,$00
- ld c,a
-; make space for north border (next 3 lines)
- add hl,bc
- add hl,bc
- add hl,bc
- ld c,$03
- add hl,bc ; this puts us past the (west) border
- ld a,[W_MAPDATAPTR] ; tile map pointer
- ld e,a
- ld a,[W_MAPDATAPTR + 1]
- ld d,a ; de = tile map pointer
- ld a,[W_CURMAPHEIGHT]
- ld b,a
-.rowLoop ; copy one row each iteration
- push hl
- ld a,[$ff8c] ; map width (without border)
- ld c,a
-.rowInnerLoop
- ld a,[de]
- inc de
- ld [hli],a
- dec c
- jr nz,.rowInnerLoop
-; add the map width plus the border to the base address of the current row to get the next row's address
- pop hl
- ld a,[$ff8b] ; map width + border
- add l
- ld l,a
- jr nc,.noCarry
- inc h
-.noCarry
- dec b
- jr nz,.rowLoop
-.northConnection
- ld a,[W_MAPCONN1PTR]
- cp a,$ff
- jr z,.southConnection
- call SwitchToMapRomBank
- ld a,[wd372]
- ld l,a
- ld a,[wd373]
- ld h,a
- ld a,[wd374]
- ld e,a
- ld a,[wd375]
- ld d,a
- ld a,[wd376]
- ld [$ff8b],a
- ld a,[wd377]
- ld [$ff8c],a
- call LoadNorthSouthConnectionsTileMap
-.southConnection
- ld a,[W_MAPCONN2PTR]
- cp a,$ff
- jr z,.westConnection
- call SwitchToMapRomBank
- ld a,[wd37d]
- ld l,a
- ld a,[wd37e]
- ld h,a
- ld a,[wd37f]
- ld e,a
- ld a,[wd380]
- ld d,a
- ld a,[wd381]
- ld [$ff8b],a
- ld a,[wd382]
- ld [$ff8c],a
- call LoadNorthSouthConnectionsTileMap
-.westConnection
- ld a,[W_MAPCONN3PTR]
- cp a,$ff
- jr z,.eastConnection
- call SwitchToMapRomBank
- ld a,[wd388]
- ld l,a
- ld a,[wd389]
- ld h,a
- ld a,[wd38a]
- ld e,a
- ld a,[wd38b]
- ld d,a
- ld a,[wd38c]
- ld b,a
- ld a,[wd38d]
- ld [$ff8b],a
- call LoadEastWestConnectionsTileMap
-.eastConnection
- ld a,[W_MAPCONN4PTR]
- cp a,$ff
- jr z,.done
- call SwitchToMapRomBank
- ld a,[wd393]
- ld l,a
- ld a,[wd394]
- ld h,a
- ld a,[wd395]
- ld e,a
- ld a,[wd396]
- ld d,a
- ld a,[wd397]
- ld b,a
- ld a,[wd398]
- ld [$ff8b],a
- call LoadEastWestConnectionsTileMap
-.done
- ret
-
-LoadNorthSouthConnectionsTileMap:: ; 0ade (0:0ade)
- ld c,$03
-.loop
- push de
- push hl
- ld a,[$ff8b] ; width of connection
- ld b,a
-.innerLoop
- ld a,[hli]
- ld [de],a
- inc de
- dec b
- jr nz,.innerLoop
- pop hl
- pop de
- ld a,[$ff8c] ; width of connected map
- add l
- ld l,a
- jr nc,.noCarry1
- inc h
-.noCarry1
- ld a,[W_CURMAPWIDTH]
- add a,$06
- add e
- ld e,a
- jr nc,.noCarry2
- inc d
-.noCarry2
- dec c
- jr nz,.loop
- ret
-
-LoadEastWestConnectionsTileMap:: ; 0b02 (0:0b02)
- push hl
- push de
- ld c,$03
-.innerLoop
- ld a,[hli]
- ld [de],a
- inc de
- dec c
- jr nz,.innerLoop
- pop de
- pop hl
- ld a,[$ff8b] ; width of connected map
- add l
- ld l,a
- jr nc,.noCarry1
- inc h
-.noCarry1
- ld a,[W_CURMAPWIDTH]
- add a,$06
- add e
- ld e,a
- jr nc,.noCarry2
- inc d
-.noCarry2
- dec b
- jr nz,LoadEastWestConnectionsTileMap
- ret
-
-; function to check if there is a sign or sprite in front of the player
-; if so, it is stored in [$FF8C]
-; if not, [$FF8C] is set to 0
-IsSpriteOrSignInFrontOfPlayer:: ; 0b23 (0:0b23)
- xor a
- ld [$ff8c],a
- ld a,[wd4b0] ; number of signs in the map
- and a
- jr z,.extendRangeOverCounter
-; if there are signs
- ld a,$35
- call Predef ; get the coordinates in front of the player in de
- ld hl,wd4b1 ; start of sign coordinates
- ld a,[wd4b0] ; number of signs in the map
- ld b,a
- ld c,$00
-.signLoop
- inc c
- ld a,[hli] ; sign Y
- cp d
- jr z,.yCoordMatched
- inc hl
- jr .retry
-.yCoordMatched
- ld a,[hli] ; sign X
- cp e
- jr nz,.retry
-.xCoordMatched
-; found sign
- push hl
- push bc
- ld hl,wd4d1 ; start of sign text ID's
- ld b,$00
- dec c
- add hl,bc
- ld a,[hl]
- ld [$ff8c],a ; store sign text ID
- pop bc
- pop hl
- ret
-.retry
- dec b
- jr nz,.signLoop
-; check if the player is front of a counter in a pokemon center, pokemart, etc. and if so, extend the range at which he can talk to the NPC
-.extendRangeOverCounter
- ld a,$35
- call Predef ; get the tile in front of the player in c
- ld hl,W_TILESETTALKINGOVERTILES ; list of tiles that extend talking range (counter tiles)
- ld b,$03
- ld d,$20 ; talking range in pixels (long range)
-.counterTilesLoop
- ld a,[hli]
- cp c
- jr z,IsSpriteInFrontOfPlayer2 ; jumps if the tile in front of the player is a counter tile
- dec b
- jr nz,.counterTilesLoop
-
-; part of the above function, but sometimes its called on its own, when signs are irrelevant
-; the caller must zero [$FF8C]
-IsSpriteInFrontOfPlayer:: ; 0b6b (0:0b6b)
- ld d,$10 ; talking range in pixels (normal range)
-IsSpriteInFrontOfPlayer2:: ; 0b6d (0:0b6d)
- ld bc,$3c40 ; Y and X position of player sprite
- ld a,[wSpriteStateData1 + 9] ; direction the player is facing
-.checkIfPlayerFacingUp
- cp a,$04
- jr nz,.checkIfPlayerFacingDown
-; facing up
- ld a,b
- sub d
- ld b,a
- ld a,$08
- jr .doneCheckingDirection
-.checkIfPlayerFacingDown
- cp a,$00
- jr nz,.checkIfPlayerFacingRight
-; facing down
- ld a,b
- add d
- ld b,a
- ld a,$04
- jr .doneCheckingDirection
-.checkIfPlayerFacingRight
- cp a,$0c
- jr nz,.playerFacingLeft
-; facing right
- ld a,c
- add d
- ld c,a
- ld a,$01
- jr .doneCheckingDirection
-.playerFacingLeft
-; facing left
- ld a,c
- sub d
- ld c,a
- ld a,$02
-.doneCheckingDirection
- ld [wd52a],a
- ld a,[W_NUMSPRITES] ; number of sprites
- and a
- ret z
-; if there are sprites
- ld hl,wSpriteStateData1 + $10
- ld d,a
- ld e,$01
-.spriteLoop
- push hl
- ld a,[hli] ; image (0 if no sprite)
- and a
- jr z,.nextSprite
- inc l
- ld a,[hli] ; sprite visibility
- inc a
- jr z,.nextSprite
- inc l
- ld a,[hli] ; Y location
- cp b
- jr nz,.nextSprite
- inc l
- ld a,[hl] ; X location
- cp c
- jr z,.foundSpriteInFrontOfPlayer
-.nextSprite
- pop hl
- ld a,l
- add a,$10
- ld l,a
- inc e
- dec d
- jr nz,.spriteLoop
- ret
-.foundSpriteInFrontOfPlayer
- pop hl
- ld a,l
- and a,$f0
- inc a
- ld l,a
- set 7,[hl]
- ld a,e
- ld [$ff8c],a ; store sprite ID
- ret
-
-; function to check if the player will jump down a ledge and check if the tile ahead is passable (when not surfing)
-; sets the carry flag if there is a collision, and unsets it if there isn't a collision
-CollisionCheckOnLand:: ; 0bd1 (0:0bd1)
- ld a,[wd736]
- bit 6,a ; is the player jumping?
- jr nz,.noCollision
-; if not jumping a ledge
- ld a,[wcd38]
- and a
- jr nz,.noCollision
- ld a,[wd52a] ; the direction that the player is trying to go in
- ld d,a
- ld a,[wSpriteStateData1 + 12] ; the player sprite's collision data (bit field) (set in the sprite movement code)
- and d ; check if a sprite is in the direction the player is trying to go
- jr nz,.collision
- xor a
- ld [$ff8c],a
- call IsSpriteInFrontOfPlayer ; check for sprite collisions again? when does the above check fail to detect a sprite collision?
- ld a,[$ff8c]
- and a ; was there a sprite collision?
- jr nz,.collision
-; if no sprite collision
- ld hl,TilePairCollisionsLand
- call CheckForJumpingAndTilePairCollisions
- jr c,.collision
- call CheckTilePassable
- jr nc,.noCollision
-.collision
- ld a,[wc02a]
- cp a,(SFX_02_5b - SFX_Headers_02) / 3 ; check if collision sound is already playing
- jr z,.setCarry
- ld a,(SFX_02_5b - SFX_Headers_02) / 3
- call PlaySound ; play collision sound (if it's not already playing)
-.setCarry
- scf
- ret
-.noCollision
- and a
- ret
-
-; function that checks if the tile in front of the player is passable
-; clears carry if it is, sets carry if not
-CheckTilePassable:: ; 0c10 (0:0c10)
- ld a,$35
- call Predef ; get tile in front of player
- ld a,[wcfc6] ; tile in front of player
- ld c,a
- ld hl,W_TILESETCOLLISIONPTR ; pointer to list of passable tiles
- ld a,[hli]
- ld h,[hl]
- ld l,a ; hl now points to passable tiles
-.loop
- ld a,[hli]
- cp a,$ff
- jr z,.tileNotPassable
- cp c
- ret z
- jr .loop
-.tileNotPassable
- scf
- ret
-
-; check if the player is going to jump down a small ledge
-; and check for collisions that only occur between certain pairs of tiles
-; Input: hl - address of directional collision data
-; sets carry if there is a collision and unsets carry if not
-CheckForJumpingAndTilePairCollisions:: ; 0c2a (0:0c2a)
- push hl
- ld a,$35
- call Predef ; get the tile in front of the player
- push de
- push bc
- callba HandleLedges ; check if the player is trying to jump a ledge
- pop bc
- pop de
- pop hl
- and a
- ld a,[wd736]
- bit 6,a ; is the player jumping?
- ret nz
-; if not jumping
-
-Func_c44:: ; 0c44 (0:0c44)
- FuncCoord 8, 9
- ld a,[Coord] ; tile the player is on
- ld [wcf0e],a
-
-CheckForTilePairCollisions:: ; 0c4a (0:0c4a)
- ld a,[wcfc6] ; tile in front of the player
- ld c,a
-.tilePairCollisionLoop
- ld a,[W_CURMAPTILESET] ; tileset number
- ld b,a
- ld a,[hli]
- cp a,$ff
- jr z,.noMatch
- cp b
- jr z,.tilesetMatches
- inc hl
-.retry
- inc hl
- jr .tilePairCollisionLoop
-.tilesetMatches
- ld a,[wcf0e] ; tile the player is on
- ld b,a
- ld a,[hl]
- cp b
- jr z,.currentTileMatchesFirstInPair
- inc hl
- ld a,[hl]
- cp b
- jr z,.currentTileMatchesSecondInPair
- jr .retry
-.currentTileMatchesFirstInPair
- inc hl
- ld a,[hl]
- cp c
- jr z,.foundMatch
- jr .tilePairCollisionLoop
-.currentTileMatchesSecondInPair
- dec hl
- ld a,[hli]
- cp c
- inc hl
- jr nz,.tilePairCollisionLoop
-.foundMatch
- scf
- ret
-.noMatch
- and a
- ret
-
-; FORMAT: tileset number, tile 1, tile 2
-; terminated by 0xFF
-; these entries indicate that the player may not cross between tile 1 and tile 2
-; it's mainly used to simulate differences in elevation
-
-TilePairCollisionsLand:: ; 0c7e (0:0c7e)
- db CAVERN, $20, $05
- db CAVERN, $41, $05
- db FOREST, $30, $2E
- db CAVERN, $2A, $05
- db CAVERN, $05, $21
- db FOREST, $52, $2E
- db FOREST, $55, $2E
- db FOREST, $56, $2E
- db FOREST, $20, $2E
- db FOREST, $5E, $2E
- db FOREST, $5F, $2E
- db $FF
-
-TilePairCollisionsWater:: ; 0ca0 (0:0ca0)
- db FOREST, $14, $2E
- db FOREST, $48, $2E
- db CAVERN, $14, $05
- db $FF
-
-; this builds a tile map from the tile block map based on the current X/Y coordinates of the player's character
-LoadCurrentMapView:: ; 0caa (0:0caa)
- ld a,[H_LOADEDROMBANK]
- push af
- ld a,[W_TILESETBANK] ; tile data ROM bank
- ld [H_LOADEDROMBANK],a
- ld [$2000],a ; switch to ROM bank that contains tile data
- ld a,[wd35f] ; address of upper left corner of current map view
- ld e,a
- ld a,[wd360]
- ld d,a
- ld hl,wTileMapBackup
- ld b,$05
-.rowLoop ; each loop iteration fills in one row of tile blocks
- push hl
- push de
- ld c,$06
-.rowInnerLoop ; loop to draw each tile block of the current row
- push bc
- push de
- push hl
- ld a,[de]
- ld c,a ; tile block number
- call DrawTileBlock
- pop hl
- pop de
- pop bc
- inc hl
- inc hl
- inc hl
- inc hl
- inc de
- dec c
- jr nz,.rowInnerLoop
-; update tile block map pointer to next row's address
- pop de
- ld a,[W_CURMAPWIDTH]
- add a,$06
- add e
- ld e,a
- jr nc,.noCarry
- inc d
-.noCarry
-; update tile map pointer to next row's address
- pop hl
- ld a,$60
- add l
- ld l,a
- jr nc,.noCarry2
- inc h
-.noCarry2
- dec b
- jr nz,.rowLoop
- ld hl,wTileMapBackup
- ld bc,$0000
-.adjustForYCoordWithinTileBlock
- ld a,[W_YBLOCKCOORD]
- and a
- jr z,.adjustForXCoordWithinTileBlock
- ld bc,$0030
- add hl,bc
-.adjustForXCoordWithinTileBlock
- ld a,[W_XBLOCKCOORD]
- and a
- jr z,.copyToVisibleAreaBuffer
- ld bc,$0002
- add hl,bc
-.copyToVisibleAreaBuffer
- ld de,wTileMap ; base address for the tiles that are directly transfered to VRAM during V-blank
- ld b,$12
-.rowLoop2
- ld c,$14
-.rowInnerLoop2
- ld a,[hli]
- ld [de],a
- inc de
- dec c
- jr nz,.rowInnerLoop2
- ld a,$04
- add l
- ld l,a
- jr nc,.noCarry3
- inc h
-.noCarry3
- dec b
- jr nz,.rowLoop2
- pop af
- ld [H_LOADEDROMBANK],a
- ld [$2000],a ; restore previous ROM bank
- ret
-
-AdvancePlayerSprite:: ; 0d27 (0:0d27)
- ld a,[wSpriteStateData1 + 3] ; delta Y
- ld b,a
- ld a,[wSpriteStateData1 + 5] ; delta X
- ld c,a
- ld hl,wWalkCounter ; walking animation counter
- dec [hl]
- jr nz,.afterUpdateMapCoords
-; if it's the end of the animation, update the player's map coordinates
- ld a,[W_YCOORD]
- add b
- ld [W_YCOORD],a
- ld a,[W_XCOORD]
- add c
- ld [W_XCOORD],a
-.afterUpdateMapCoords
- ld a,[wWalkCounter] ; walking animation counter
- cp a,$07
- jp nz,.scrollBackgroundAndSprites
-; if this is the first iteration of the animation
- ld a,c
- cp a,$01
- jr nz,.checkIfMovingWest
-; moving east
- ld a,[wd526]
- ld e,a
- and a,$e0
- ld d,a
- ld a,e
- add a,$02
- and a,$1f
- or d
- ld [wd526],a
- jr .adjustXCoordWithinBlock
-.checkIfMovingWest
- cp a,$ff
- jr nz,.checkIfMovingSouth
-; moving west
- ld a,[wd526]
- ld e,a
- and a,$e0
- ld d,a
- ld a,e
- sub a,$02
- and a,$1f
- or d
- ld [wd526],a
- jr .adjustXCoordWithinBlock
-.checkIfMovingSouth
- ld a,b
- cp a,$01
- jr nz,.checkIfMovingNorth
-; moving south
- ld a,[wd526]
- add a,$40
- ld [wd526],a
- jr nc,.adjustXCoordWithinBlock
- ld a,[wd527]
- inc a
- and a,$03
- or a,$98
- ld [wd527],a
- jr .adjustXCoordWithinBlock
-.checkIfMovingNorth
- cp a,$ff
- jr nz,.adjustXCoordWithinBlock
-; moving north
- ld a,[wd526]
- sub a,$40
- ld [wd526],a
- jr nc,.adjustXCoordWithinBlock
- ld a,[wd527]
- dec a
- and a,$03
- or a,$98
- ld [wd527],a
-.adjustXCoordWithinBlock
- ld a,c
- and a
- jr z,.pointlessJump ; mistake?
-.pointlessJump
- ld hl,W_XBLOCKCOORD
- ld a,[hl]
- add c
- ld [hl],a
- cp a,$02
- jr nz,.checkForMoveToWestBlock
-; moved into the tile block to the east
- xor a
- ld [hl],a
- ld hl,wd4e3
- inc [hl]
- ld de,wd35f
- call MoveTileBlockMapPointerEast
- jr .updateMapView
-.checkForMoveToWestBlock
- cp a,$ff
- jr nz,.adjustYCoordWithinBlock
-; moved into the tile block to the west
- ld a,$01
- ld [hl],a
- ld hl,wd4e3
- dec [hl]
- ld de,wd35f
- call MoveTileBlockMapPointerWest
- jr .updateMapView
-.adjustYCoordWithinBlock
- ld hl,W_YBLOCKCOORD
- ld a,[hl]
- add b
- ld [hl],a
- cp a,$02
- jr nz,.checkForMoveToNorthBlock
-; moved into the tile block to the south
- xor a
- ld [hl],a
- ld hl,wd4e2
- inc [hl]
- ld de,wd35f
- ld a,[W_CURMAPWIDTH]
- call MoveTileBlockMapPointerSouth
- jr .updateMapView
-.checkForMoveToNorthBlock
- cp a,$ff
- jr nz,.updateMapView
-; moved into the tile block to the north
- ld a,$01
- ld [hl],a
- ld hl,wd4e2
- dec [hl]
- ld de,wd35f
- ld a,[W_CURMAPWIDTH]
- call MoveTileBlockMapPointerNorth
-.updateMapView
- call LoadCurrentMapView
- ld a,[wSpriteStateData1 + 3] ; delta Y
- cp a,$01
- jr nz,.checkIfMovingNorth2
-; if moving south
- call ScheduleSouthRowRedraw
- jr .scrollBackgroundAndSprites
-.checkIfMovingNorth2
- cp a,$ff
- jr nz,.checkIfMovingEast2
-; if moving north
- call ScheduleNorthRowRedraw
- jr .scrollBackgroundAndSprites
-.checkIfMovingEast2
- ld a,[wSpriteStateData1 + 5] ; delta X
- cp a,$01
- jr nz,.checkIfMovingWest2
-; if moving east
- call ScheduleEastColumnRedraw
- jr .scrollBackgroundAndSprites
-.checkIfMovingWest2
- cp a,$ff
- jr nz,.scrollBackgroundAndSprites
-; if moving west
- call ScheduleWestColumnRedraw
-.scrollBackgroundAndSprites
- ld a,[wSpriteStateData1 + 3] ; delta Y
- ld b,a
- ld a,[wSpriteStateData1 + 5] ; delta X
- ld c,a
- sla b
- sla c
- ld a,[$ffaf]
- add b
- ld [$ffaf],a ; update background scroll Y
- ld a,[$ffae]
- add c
- ld [$ffae],a ; update background scroll X
-; shift all the sprites in the direction opposite of the player's motion
-; so that the player appears to move relative to them
- ld hl,wSpriteStateData1 + $14
- ld a,[W_NUMSPRITES] ; number of sprites
- and a ; are there any sprites?
- jr z,.done
- ld e,a
-.spriteShiftLoop
- ld a,[hl]
- sub b
- ld [hli],a
- inc l
- ld a,[hl]
- sub c
- ld [hl],a
- ld a,$0e
- add l
- ld l,a
- dec e
- jr nz,.spriteShiftLoop
-.done
- ret
-
-; the following four functions are used to move the pointer to the upper left
-; corner of the tile block map in the direction of motion
-
-MoveTileBlockMapPointerEast:: ; 0e65 (0:0e65)
- ld a,[de]
- add a,$01
- ld [de],a
- ret nc
- inc de
- ld a,[de]
- inc a
- ld [de],a
- ret
-
-MoveTileBlockMapPointerWest:: ; 0e6f (0:0e6f)
- ld a,[de]
- sub a,$01
- ld [de],a
- ret nc
- inc de
- ld a,[de]
- dec a
- ld [de],a
- ret
-
-MoveTileBlockMapPointerSouth:: ; 0e79 (0:0e79)
- add a,$06
- ld b,a
- ld a,[de]
- add b
- ld [de],a
- ret nc
- inc de
- ld a,[de]
- inc a
- ld [de],a
- ret
-
-MoveTileBlockMapPointerNorth:: ; 0e85 (0:0e85)
- add a,$06
- ld b,a
- ld a,[de]
- sub b
- ld [de],a
- ret nc
- inc de
- ld a,[de]
- dec a
- ld [de],a
- ret
-
-; the following 6 functions are used to tell the V-blank handler to redraw
-; the portion of the map that was newly exposed due to the player's movement
-
-ScheduleNorthRowRedraw:: ; 0e91 (0:0e91)
- FuncCoord 0, 0
- ld hl,Coord
- call ScheduleRowRedrawHelper
- ld a,[wd526]
- ld [H_SCREENEDGEREDRAWADDR],a
- ld a,[wd527]
- ld [H_SCREENEDGEREDRAWADDR + 1],a
- ld a,REDRAWROW
- ld [H_SCREENEDGEREDRAW],a
- ret
-
-ScheduleRowRedrawHelper:: ; 0ea6 (0:0ea6)
- ld de,wScreenEdgeTiles
- ld c,$28
-.loop
- ld a,[hli]
- ld [de],a
- inc de
- dec c
- jr nz,.loop
- ret
-
-ScheduleSouthRowRedraw:: ; 0eb2 (0:0eb2)
- FuncCoord 0,16
- ld hl,Coord
- call ScheduleRowRedrawHelper
- ld a,[wd526]
- ld l,a
- ld a,[wd527]
- ld h,a
- ld bc,$0200
- add hl,bc
- ld a,h
- and a,$03
- or a,$98
- ld [H_SCREENEDGEREDRAWADDR + 1],a
- ld a,l
- ld [H_SCREENEDGEREDRAWADDR],a
- ld a,REDRAWROW
- ld [H_SCREENEDGEREDRAW],a
- ret
-
-ScheduleEastColumnRedraw:: ; 0ed3 (0:0ed3)
- FuncCoord 18,0
- ld hl,Coord
- call ScheduleColumnRedrawHelper
- ld a,[wd526]
- ld c,a
- and a,$e0
- ld b,a
- ld a,c
- add a,18
- and a,$1f
- or b
- ld [H_SCREENEDGEREDRAWADDR],a
- ld a,[wd527]
- ld [H_SCREENEDGEREDRAWADDR + 1],a
- ld a,REDRAWCOL
- ld [H_SCREENEDGEREDRAW],a
- ret
-
-ScheduleColumnRedrawHelper:: ; 0ef2 (0:0ef2)
- ld de,wScreenEdgeTiles
- ld c,$12
-.loop
- ld a,[hli]
- ld [de],a
- inc de
- ld a,[hl]
- ld [de],a
- inc de
- ld a,19
- add l
- ld l,a
- jr nc,.noCarry
- inc h
-.noCarry
- dec c
- jr nz,.loop
- ret
-
-ScheduleWestColumnRedraw:: ; 0f08 (0:0f08)
- FuncCoord 0,0
- ld hl,Coord
- call ScheduleColumnRedrawHelper
- ld a,[wd526]
- ld [H_SCREENEDGEREDRAWADDR],a
- ld a,[wd527]
- ld [H_SCREENEDGEREDRAWADDR + 1],a
- ld a,REDRAWCOL
- ld [H_SCREENEDGEREDRAW],a
- ret
-
-; function to write the tiles that make up a tile block to memory
-; Input: c = tile block ID, hl = destination address
-DrawTileBlock:: ; 0f1d (0:0f1d)
- push hl
- ld a,[W_TILESETBLOCKSPTR] ; pointer to tiles
- ld l,a
- ld a,[W_TILESETBLOCKSPTR + 1]
- ld h,a
- ld a,c
- swap a
- ld b,a
- and a,$f0
- ld c,a
- ld a,b
- and a,$0f
- ld b,a ; bc = tile block ID * 0x10
- add hl,bc
- ld d,h
- ld e,l ; de = address of the tile block's tiles
- pop hl
- ld c,$04 ; 4 loop iterations
-.loop ; each loop iteration, write 4 tile numbers
- push bc
- ld a,[de]
- ld [hli],a
- inc de
- ld a,[de]
- ld [hli],a
- inc de
- ld a,[de]
- ld [hli],a
- inc de
- ld a,[de]
- ld [hl],a
- inc de
- ld bc,$0015
- add hl,bc
- pop bc
- dec c
- jr nz,.loop
- ret
-
-; function to update joypad state and simulate button presses
-JoypadOverworld:: ; 0f4d (0:0f4d)
- xor a
- ld [wSpriteStateData1 + 3],a
- ld [wSpriteStateData1 + 5],a
- call RunMapScript
- call Joypad
- ld a,[W_FLAGS_D733]
- bit 3,a ; check if a trainer wants a challenge
- jr nz,.notForcedDownwards
- ld a,[W_CURMAP]
- cp a,ROUTE_17 ; Cycling Road
- jr nz,.notForcedDownwards
- ld a,[hJoyHeld] ; current joypad state
- and a,%11110011 ; bit mask for all directions and A/B
- jr nz,.notForcedDownwards
- ld a,%10000000 ; down pressed
- ld [hJoyHeld],a ; on the cycling road, if there isn't a trainer and the player isn't pressing buttons, simulate a down press
-.notForcedDownwards
- ld a,[wd730]
- bit 7,a
- ret z
-; if simulating button presses
- ld a,[hJoyHeld] ; current joypad state
- ld b,a
- ld a,[wcd3b] ; bit mask for button presses that override simulated ones
- and b
- ret nz ; return if the simulated button presses are overridden
- ld hl,wcd38 ; index of current simulated button press
- dec [hl]
- ld a,[hl]
- cp a,$ff
- jr z,.doneSimulating ; if the end of the simulated button presses has been reached
- ld hl,wccd3 ; base address of simulated button presses
-; add offset to base address
- add l
- ld l,a
- jr nc,.noCarry
- inc h
-.noCarry
- ld a,[hl]
- ld [hJoyHeld],a ; store simulated button press in joypad state
- and a
- ret nz
- ld [hJoyPressed],a
- ld [hJoyReleased],a
- ret
-; if done simulating button presses
-.doneSimulating
- xor a
- ld [wcd3a],a
- ld [wcd38],a
- ld [wccd3],a
- ld [wJoyIgnore],a
- ld [hJoyHeld],a
- ld hl,wd736
- ld a,[hl]
- and a,$f8
- ld [hl],a
- ld hl,wd730
- res 7,[hl]
- ret
-
-; function to check the tile ahead to determine if the character should get on land or keep surfing
-; sets carry if there is a collision and clears carry otherwise
-; It seems that this function has a bug in it, but due to luck, it doesn't
-; show up. After detecting a sprite collision, it jumps to the code that
-; checks if the next tile is passable instead of just directly jumping to the
-; "collision detected" code. However, it doesn't store the next tile in c,
-; so the old value of c is used. 2429 is always called before this function,
-; and 2429 always sets c to 0xF0. There is no 0xF0 background tile, so it
-; is considered impassable and it is detected as a collision.
-CollisionCheckOnWater:: ; 0fb7 (0:0fb7)
- ld a,[wd730]
- bit 7,a
- jp nz,.noCollision ; return and clear carry if button presses are being simulated
- ld a,[wd52a] ; the direction that the player is trying to go in
- ld d,a
- ld a,[wSpriteStateData1 + 12] ; the player sprite's collision data (bit field) (set in the sprite movement code)
- and d ; check if a sprite is in the direction the player is trying to go
- jr nz,.checkIfNextTileIsPassable ; bug?
- ld hl,TilePairCollisionsWater
- call CheckForJumpingAndTilePairCollisions
- jr c,.collision
- ld a,$35
- call Predef ; get tile in front of player (puts it in c and [wcfc6])
- ld a,[wcfc6] ; tile in front of player
- cp a,$14 ; water tile
- jr z,.noCollision ; keep surfing if it's a water tile
- cp a,$32 ; either the left tile of the S.S. Anne boarding platform or the tile on eastern coastlines (depending on the current tileset)
- jr z,.checkIfVermilionDockTileset
- cp a,$48 ; tile on right on coast lines in Safari Zone
- jr z,.noCollision ; keep surfing
-; check if the [land] tile in front of the player is passable
-.checkIfNextTileIsPassable
- ld hl,W_TILESETCOLLISIONPTR ; pointer to list of passable tiles
- ld a,[hli]
- ld h,[hl]
- ld l,a
-.loop
- ld a,[hli]
- cp a,$ff
- jr z,.collision
- cp c
- jr z,.stopSurfing ; stop surfing if the tile is passable
- jr .loop
-.collision
- ld a,[wc02a]
- cp a,(SFX_02_5b - SFX_Headers_02) / 3 ; check if collision sound is already playing
- jr z,.setCarry
- ld a,(SFX_02_5b - SFX_Headers_02) / 3
- call PlaySound ; play collision sound (if it's not already playing)
-.setCarry
- scf
- jr .done
-.noCollision
- and a
-.done
- ret
-.stopSurfing
- xor a
- ld [wd700],a
- call LoadPlayerSpriteGraphics
- call Func_2307
- jr .noCollision
-.checkIfVermilionDockTileset
- ld a, [W_CURMAPTILESET] ; tileset
- cp SHIP_PORT ; Vermilion Dock tileset
- jr nz, .noCollision ; keep surfing if it's not the boarding platform tile
- jr .stopSurfing ; if it is the boarding platform tile, stop surfing
-
-; function to run the current map's script
-RunMapScript:: ; 101b (0:101b)
- push hl
- push de
- push bc
- callba Func_f225 ; check if the player is pushing a boulder
- ld a,[wFlags_0xcd60]
- bit 1,a ; is the player pushing a boulder?
- jr z,.afterBoulderEffect
- callba Func_f2b5 ; displays dust effect when pushing a boulder
-.afterBoulderEffect
- pop bc
- pop de
- pop hl
- call Func_310e
- ld a,[W_CURMAP] ; current map number
- call SwitchToMapRomBank ; change to the ROM bank the map's data is in
- ld hl,W_MAPSCRIPTPTR
- ld a,[hli]
- ld h,[hl]
- ld l,a
- ld de,.return
- push de
- jp [hl] ; jump to script
-.return
- ret
-
-LoadWalkingPlayerSpriteGraphics:: ; 104d (0:104d)
- ld de,RedSprite ; $4180
- ld hl,vNPCSprites
- jr LoadPlayerSpriteGraphicsCommon
-
-LoadSurfingPlayerSpriteGraphics:: ; 1055 (0:1055)
- ld de,SeelSprite
- ld hl,vNPCSprites
- jr LoadPlayerSpriteGraphicsCommon
-
-LoadBikePlayerSpriteGraphics:: ; 105d (0:105d)
- ld de,RedCyclingSprite
- ld hl,vNPCSprites
-
-LoadPlayerSpriteGraphicsCommon:: ; 1063 (0:1063)
- push de
- push hl
- ld bc,(BANK(RedSprite) << 8) + $0c
- call CopyVideoData
- pop hl
- pop de
- ld a,$c0
- add e
- ld e,a
- jr nc,.noCarry
- inc d
-.noCarry
- set 3,h
- ld bc,$050c
- jp CopyVideoData
-
-; function to load data from the map header
-LoadMapHeader:: ; 107c (0:107c)
- callba Func_f113
- ld a,[W_CURMAPTILESET]
- ld [wd119],a
- ld a,[W_CURMAP]
- call SwitchToMapRomBank
- ld a,[W_CURMAPTILESET]
- ld b,a
- res 7,a
- ld [W_CURMAPTILESET],a
- ld [$ff8b],a
- bit 7,b
- ret nz
- ld hl,MapHeaderPointers
- ld a,[W_CURMAP]
- sla a
- jr nc,.noCarry1
- inc h
-.noCarry1
- add l
- ld l,a
- jr nc,.noCarry2
- inc h
-.noCarry2
- ld a,[hli]
- ld h,[hl]
- ld l,a ; hl = base of map header
-; copy the first 10 bytes (the fixed area) of the map data to D367-D370
- ld de,W_CURMAPTILESET
- ld c,$0a
-.copyFixedHeaderLoop
- ld a,[hli]
- ld [de],a
- inc de
- dec c
- jr nz,.copyFixedHeaderLoop
-; initialize all the connected maps to disabled at first, before loading the actual values
- ld a,$ff
- ld [W_MAPCONN1PTR],a
- ld [W_MAPCONN2PTR],a
- ld [W_MAPCONN3PTR],a
- ld [W_MAPCONN4PTR],a
-; copy connection data (if any) to WRAM
- ld a,[W_MAPCONNECTIONS]
- ld b,a
-.checkNorth
- bit 3,b
- jr z,.checkSouth
- ld de,W_MAPCONN1PTR
- call CopyMapConnectionHeader
-.checkSouth
- bit 2,b
- jr z,.checkWest
- ld de,W_MAPCONN2PTR
- call CopyMapConnectionHeader
-.checkWest
- bit 1,b
- jr z,.checkEast
- ld de,W_MAPCONN3PTR
- call CopyMapConnectionHeader
-.checkEast
- bit 0,b
- jr z,.getObjectDataPointer
- ld de,W_MAPCONN4PTR
- call CopyMapConnectionHeader
-.getObjectDataPointer
- ld a,[hli]
- ld [wd3a9],a
- ld a,[hli]
- ld [wd3aa],a
- push hl
- ld a,[wd3a9]
- ld l,a
- ld a,[wd3aa]
- ld h,a ; hl = base of object data
- ld de,wd3ad ; background tile ID
- ld a,[hli]
- ld [de],a ; save background tile ID
-.loadWarpData
- ld a,[hli] ; number of warps
- ld [wd3ae],a ; save the number of warps
- and a ; are there any warps?
- jr z,.loadSignData ; if not, skip this
- ld c,a
- ld de,wd3af ; base address of warps
-.warpLoop ; one warp per loop iteration
- ld b,$04
-.warpInnerLoop
- ld a,[hli]
- ld [de],a
- inc de
- dec b
- jr nz,.warpInnerLoop
- dec c
- jr nz,.warpLoop
-.loadSignData
- ld a,[hli] ; number of signs
- ld [wd4b0],a ; save the number of signs
- and a ; are there any signs?
- jr z,.loadSpriteData ; if not, skip this
- ld c,a
- ld de,wd4d1 ; base address of sign text IDs
- ld a,d
- ld [$ff95],a
- ld a,e
- ld [$ff96],a
- ld de,wd4b1 ; base address of sign coordinates
-.signLoop
- ld a,[hli]
- ld [de],a
- inc de
- ld a,[hli]
- ld [de],a
- inc de
- push de
- ld a,[$ff95]
- ld d,a
- ld a,[$ff96]
- ld e,a
- ld a,[hli]
- ld [de],a
- inc de
- ld a,d
- ld [$ff95],a
- ld a,e
- ld [$ff96],a
- pop de
- dec c
- jr nz,.signLoop
-.loadSpriteData
- ld a,[wd72e]
- bit 5,a ; did a battle happen immediately before this?
- jp nz,.finishUp ; if so, skip this because battles don't destroy this data
- ld a,[hli]
- ld [W_NUMSPRITES],a ; save the number of sprites
- push hl
-; zero C110-C1FF and C210-C2FF
- ld hl,wSpriteStateData1 + $10
- ld de,wSpriteStateData2 + $10
- xor a
- ld b,$f0
-.zeroSpriteDataLoop
- ld [hli],a
- ld [de],a
- inc e
- dec b
- jr nz,.zeroSpriteDataLoop
-; initialize all C100-C1FF sprite entries to disabled (other than player's)
- ld hl,wSpriteStateData1 + $12
- ld de,$0010
- ld c,$0f
-.disableSpriteEntriesLoop
- ld [hl],$ff
- add hl,de
- dec c
- jr nz,.disableSpriteEntriesLoop
- pop hl
- ld de,wSpriteStateData1 + $10
- ld a,[W_NUMSPRITES] ; number of sprites
- and a ; are there any sprites?
- jp z,.finishUp ; if there are no sprites, skip the rest
- ld b,a
- ld c,$00
-.loadSpriteLoop
- ld a,[hli]
- ld [de],a ; store picture ID at C1X0
- inc d
- ld a,$04
- add e
- ld e,a
- ld a,[hli]
- ld [de],a ; store Y position at C2X4
- inc e
- ld a,[hli]
- ld [de],a ; store X position at C2X5
- inc e
- ld a,[hli]
- ld [de],a ; store movement byte 1 at C2X6
- ld a,[hli]
- ld [$ff8d],a ; save movement byte 2
- ld a,[hli]
- ld [$ff8e],a ; save text ID and flags byte
- push bc
- push hl
- ld b,$00
- ld hl,W_MAPSPRITEDATA
- add hl,bc
- ld a,[$ff8d]
- ld [hli],a ; store movement byte 2 in byte 0 of sprite entry
- ld a,[$ff8e]
- ld [hl],a ; this appears pointless, since the value is overwritten immediately after
- ld a,[$ff8e]
- ld [$ff8d],a
- and a,$3f
- ld [hl],a ; store text ID in byte 1 of sprite entry
- pop hl
- ld a,[$ff8d]
- bit 6,a
- jr nz,.trainerSprite
- bit 7,a
- jr nz,.itemBallSprite
- jr .regularSprite
-.trainerSprite
- ld a,[hli]
- ld [$ff8d],a ; save trainer class
- ld a,[hli]
- ld [$ff8e],a ; save trainer number (within class)
- push hl
- ld hl,W_MAPSPRITEEXTRADATA
- add hl,bc
- ld a,[$ff8d]
- ld [hli],a ; store trainer class in byte 0 of the entry
- ld a,[$ff8e]
- ld [hl],a ; store trainer number in byte 1 of the entry
- pop hl
- jr .nextSprite
-.itemBallSprite
- ld a,[hli]
- ld [$ff8d],a ; save item number
- push hl
- ld hl,W_MAPSPRITEEXTRADATA
- add hl,bc
- ld a,[$ff8d]
- ld [hli],a ; store item number in byte 0 of the entry
- xor a
- ld [hl],a ; zero byte 1, since it is not used
- pop hl
- jr .nextSprite
-.regularSprite
- push hl
- ld hl,W_MAPSPRITEEXTRADATA
- add hl,bc
-; zero both bytes, since regular sprites don't use this extra space
- xor a
- ld [hli],a
- ld [hl],a
- pop hl
-.nextSprite
- pop bc
- dec d
- ld a,$0a
- add e
- ld e,a
- inc c
- inc c
- dec b
- jp nz,.loadSpriteLoop
-.finishUp
- ld a,$19
- call Predef ; load tileset data
- callab LoadWildData ; load wild pokemon data
- pop hl ; restore hl from before going to the warp/sign/sprite data (this value was saved for seemingly no purpose)
- ld a,[W_CURMAPHEIGHT] ; map height in 4x4 tile blocks
- add a ; double it
- ld [wd524],a ; store map height in 2x2 tile blocks
- ld a,[W_CURMAPWIDTH] ; map width in 4x4 tile blocks
- add a ; double it
- ld [wd525],a ; map width in 2x2 tile blocks
- ld a,[W_CURMAP]
- ld c,a
- ld b,$00
- ld a,[H_LOADEDROMBANK]
- push af
- ld a, BANK(MapSongBanks)
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- ld hl, MapSongBanks
- add hl,bc
- add hl,bc
- ld a,[hli]
- ld [wd35b],a ; music 1
- ld a,[hl]
- ld [wd35c],a ; music 2
- pop af
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- ret
-
-; function to copy map connection data from ROM to WRAM
-; Input: hl = source, de = destination
-CopyMapConnectionHeader:: ; 1238 (0:1238)
- ld c,$0b
-.loop
- ld a,[hli]
- ld [de],a
- inc de
- dec c
- jr nz,.loop
- ret
-
-; function to load map data
-LoadMapData:: ; 1241 (0:1241)
- ld a,[H_LOADEDROMBANK]
- push af
- call DisableLCD
- ld a,$98
- ld [wd527],a
- xor a
- ld [wd526],a
- ld [$ffaf],a
- ld [$ffae],a
- ld [wWalkCounter],a
- ld [wd119],a
- ld [wd11a],a
- ld [W_SPRITESETID],a
- call LoadTextBoxTilePatterns
- call LoadMapHeader
- callba InitMapSprites ; load tile pattern data for sprites
- call LoadTileBlockMap
- call LoadTilesetTilePatternData
- call LoadCurrentMapView
-; copy current map view to VRAM
- ld hl,wTileMap
- ld de,vBGMap0
- ld b,18
-.vramCopyLoop
- ld c,20
-.vramCopyInnerLoop
- ld a,[hli]
- ld [de],a
- inc e
- dec c
- jr nz,.vramCopyInnerLoop
- ld a,32 - 20
- add e
- ld e,a
- jr nc,.noCarry
- inc d
-.noCarry
- dec b
- jr nz,.vramCopyLoop
- ld a,$01
- ld [wcfcb],a
- call EnableLCD
- ld b,$09
- call GoPAL_SET
- call LoadPlayerSpriteGraphics
- ld a,[wd732]
- and a,$18 ; did the player fly or teleport in?
- jr nz,.restoreRomBank
- ld a,[W_FLAGS_D733]
- bit 1,a
- jr nz,.restoreRomBank
- call Func_235f ; music related
- call Func_2312 ; music related
-.restoreRomBank
- pop af
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- ret
-
-; function to switch to the ROM bank that a map is stored in
-; Input: a = map number
-SwitchToMapRomBank:: ; 12bc (0:12bc)
- push hl
- push bc
- ld c,a
- ld b,$00
- ld a,Bank(MapHeaderBanks)
- call BankswitchHome ; switch to ROM bank 3
- ld hl,MapHeaderBanks
- add hl,bc
- ld a,[hl]
- ld [$ffe8],a ; save map ROM bank
- call BankswitchBack
- ld a,[$ffe8]
- ld [H_LOADEDROMBANK],a
- ld [$2000],a ; switch to map ROM bank
- pop bc
- pop hl
- ret
-
-Func_12da:: ; 12da (0:12da)
- ld a, $1e
- ld [wd13a], a
- ld hl, wd730
- ld a, [hl]
- or $26
- ld [hl], a
- ret
-
-Func_12e7:: ; 12e7 (0:12e7)
- ld hl, wd728
- res 0, [hl]
- ret
-
-ForceBikeOrSurf:: ; 12ed (0:12ed)
- ld b, BANK(RedSprite)
- ld hl, LoadPlayerSpriteGraphics
- call Bankswitch
- jp Func_2307 ; update map/player state?
+INCLUDE "home/overworld.asm"
; this is used to check if the player wants to interrupt the opening sequence at several points
; XXX is this used anywhere else?
@@ -3365,75 +908,33 @@ InterlaceMergeSpriteBuffers:: ; 16ea (0:16ea)
ld b, a
jp CopyVideoData
-Underground_Coll:: ; 172f (0:172f)
- INCBIN "gfx/tilesets/underground.tilecoll"
-Overworld_Coll:: ; 1735 (0:1735)
- INCBIN "gfx/tilesets/overworld.tilecoll"
-RedsHouse1_Coll::
-RedsHouse2_Coll:: ; 1749 (0:1749)
- INCBIN "gfx/tilesets/reds_house.tilecoll"
-Mart_Coll
-Pokecenter_Coll:: ; 1753 (0:1753)
- INCBIN "gfx/tilesets/pokecenter.tilecoll"
-Dojo_Coll::
-Gym_Coll:: ; 1759 (0:1759)
- INCBIN "gfx/tilesets/gym.tilecoll"
-Forest_Coll:: ; 1765 (0:1765)
- INCBIN "gfx/tilesets/forest.tilecoll"
-House_Coll:: ; 1775 (0:1775)
- INCBIN "gfx/tilesets/house.tilecoll"
-ForestGate_Coll::
-Museum_Coll::
-Gate_Coll:: ; 177f (0:177f)
- INCBIN "gfx/tilesets/gate.tilecoll"
-Ship_Coll:: ; 178a (0:178a)
- INCBIN "gfx/tilesets/ship.tilecoll"
-ShipPort_Coll:: ; 1795 (0:1795)
- INCBIN "gfx/tilesets/ship_port.tilecoll"
-Cemetery_Coll:: ; 179a (0:179a)
- INCBIN "gfx/tilesets/cemetery.tilecoll"
-Interior_Coll:: ; 17a2 (0:17a2)
- INCBIN "gfx/tilesets/interior.tilecoll"
-Cavern_Coll:: ; 17ac (0:17ac)
- INCBIN "gfx/tilesets/cavern.tilecoll"
-Lobby_Coll:: ; 17b8 (0:17b8)
- INCBIN "gfx/tilesets/lobby.tilecoll"
-Mansion_Coll:: ; 17c0 (0:17c0)
- INCBIN "gfx/tilesets/mansion.tilecoll"
-Lab_Coll:: ; 17ca (0:17ca)
- INCBIN "gfx/tilesets/lab.tilecoll"
-Club_Coll:: ; 17d1 (0:17d1)
- INCBIN "gfx/tilesets/club.tilecoll"
-Facility_Coll:: ; 17dd (0:17dd)
- INCBIN "gfx/tilesets/facility.tilecoll"
-Plateau_Coll:: ; 17f0 (0:17f0)
- INCBIN "gfx/tilesets/plateau.tilecoll"
-
-; does the same thing as FarCopyData at 009D
-; only difference is that it uses [$ff8b] instead of [wHPBarMaxHP] for a temp value
-; copy bc bytes of data from a:hl to de
-FarCopyData2:: ; 17f7 (0:17f7)
+
+INCLUDE "data/collision.asm"
+
+
+FarCopyData2::
+; Identical to FarCopyData, but uses $ff8b
+; as temp space instead of wBuffer.
ld [$ff8b],a
ld a,[H_LOADEDROMBANK]
push af
ld a,[$ff8b]
ld [H_LOADEDROMBANK],a
- ld [$2000],a
+ ld [MBC3RomBank],a
call CopyData
pop af
ld [H_LOADEDROMBANK],a
- ld [$2000],a
+ ld [MBC3RomBank],a
ret
-; does a far copy but the source is de and the destination is hl
-; copy bc bytes of data from a:de to hl
-FarCopyData3:: ; 180d (0:180d)
+FarCopyData3::
+; Copy bc bytes from a:de to hl.
ld [$ff8b],a
ld a,[H_LOADEDROMBANK]
push af
ld a,[$ff8b]
ld [H_LOADEDROMBANK],a
- ld [$2000],a
+ ld [MBC3RomBank],a
push hl
push de
push de
@@ -3445,18 +946,18 @@ FarCopyData3:: ; 180d (0:180d)
pop hl
pop af
ld [H_LOADEDROMBANK],a
- ld [$2000],a
+ ld [MBC3RomBank],a
ret
-; copies each source byte to the destination twice (next to each other)
-; copy bc source bytes from a:hl to de
-FarCopyDataDouble:: ; 182b (0:182b)
+FarCopyDataDouble::
+; Expand bc bytes of 1bpp image data
+; from a:hl to 2bpp data at de.
ld [$ff8b],a
ld a,[H_LOADEDROMBANK]
push af
ld a,[$ff8b]
ld [H_LOADEDROMBANK],a
- ld [$2000],a
+ ld [MBC3RomBank],a
.loop
ld a,[hli]
ld [de],a
@@ -3469,1740 +970,184 @@ FarCopyDataDouble:: ; 182b (0:182b)
jr nz,.loop
pop af
ld [H_LOADEDROMBANK],a
- ld [$2000],a
+ ld [MBC3RomBank],a
ret
-; copy (c * 16) bytes from b:de to hl during V-blank
-; transfers up to 128 bytes per V-blank
-CopyVideoData:: ; 1848 (0:1848)
- ld a,[H_AUTOBGTRANSFERENABLED] ; save auto-transfer enabled flag
- push af
- xor a
- ld [H_AUTOBGTRANSFERENABLED],a ; disable auto-transfer while copying
- ld a,[H_LOADEDROMBANK]
- ld [$ff8b],a
- ld a,b
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- ld a,e
- ld [H_VBCOPYSRC],a
- ld a,d
- ld [H_VBCOPYSRC + 1],a
- ld a,l
- ld [H_VBCOPYDEST],a
- ld a,h
- ld [H_VBCOPYDEST + 1],a
-.loop
- ld a,c
- cp a,8 ; are there more than 128 bytes left to copy?
- jr nc,.copyMaxSize ; only copy up to 128 bytes at a time
-.copyRemainder
- ld [H_VBCOPYSIZE],a
- call DelayFrame ; wait for V-blank handler to perform the copy
- ld a,[$ff8b]
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- pop af
- ld [H_AUTOBGTRANSFERENABLED],a ; restore original auto-transfer enabled flag
- ret
-.copyMaxSize
- ld a,8 ; 128 bytes
- ld [H_VBCOPYSIZE],a
- call DelayFrame ; wait for V-blank handler to perform the copy
- ld a,c
- sub a,8
- ld c,a
- jr .loop
+CopyVideoData::
+; Wait for the next VBlank, then copy c 2bpp
+; tiles from b:de to hl, 8 tiles at a time.
+; This takes c/8 frames.
-; copy (c * 8) source bytes from b:de to hl during V-blank
-; copies each source byte to the destination twice (next to each other)
-; transfers up to 64 source bytes per V-blank
-CopyVideoDataDouble:: ; 1886 (0:1886)
- ld a,[H_AUTOBGTRANSFERENABLED] ; save auto-transfer enabled flag
+ ld a, [H_AUTOBGTRANSFERENABLED]
push af
- xor a
- ld [H_AUTOBGTRANSFERENABLED],a ; disable auto-transfer while copying
- ld a,[H_LOADEDROMBANK]
- ld [$ff8b],a
- ld a,b
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- ld a,e
- ld [H_VBCOPYDOUBLESRC],a
- ld a,d
- ld [H_VBCOPYDOUBLESRC + 1],a
- ld a,l
- ld [H_VBCOPYDOUBLEDEST],a
- ld a,h
- ld [H_VBCOPYDOUBLEDEST + 1],a
-.loop
- ld a,c
- cp a,8 ; are there more than 64 source bytes left to copy?
- jr nc,.copyMaxSize ; only copy up to 64 source bytes at a time
-.copyRemainder
- ld [H_VBCOPYDOUBLESIZE],a
- call DelayFrame ; wait for V-blank handler to perform the copy
- ld a,[$ff8b]
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- pop af
- ld [H_AUTOBGTRANSFERENABLED],a ; restore original auto-transfer enabled flag
- ret
-.copyMaxSize
- ld a,8 ; 64 source bytes
- ld [H_VBCOPYDOUBLESIZE],a
- call DelayFrame ; wait for V-blank handler to perform the copy
- ld a,c
- sub a,8
- ld c,a
- jr .loop
+ xor a ; disable auto-transfer while copying
+ ld [H_AUTOBGTRANSFERENABLED], a
-; clears an area of the screen
-; INPUT:
-; hl = address of upper left corner of the area
-; b = height
-; c = width
-ClearScreenArea:: ; 18c4 (0:18c4)
- ld a,$7F ; blank tile
- ld de,20 ; screen width
-.loop
- push hl
- push bc
-.innerLoop
- ld [hli],a
- dec c
- jr nz,.innerLoop
- pop bc
- pop hl
- add hl,de
- dec b
- jr nz,.loop
- ret
+ ld a, [H_LOADEDROMBANK]
+ ld [$ff8b], a
-; copies the screen tile buffer from WRAM to VRAM
-; copying is done in 3 chunks of 6 rows each
-; b: high byte of VRAM destination address ($98 or $9c for window tile map 0 or 1 resp.)
-CopyScreenTileBufferToVRAM:: ; 18d6 (0:18d6)
- ld c, $6
- ld hl, $0000
- ld de, wTileMap
- call InitScreenTileBufferTransferParameters
- call DelayFrame
- ld hl, $600
- ld de, wTileMap + 20 * 6
- call InitScreenTileBufferTransferParameters
- call DelayFrame
- ld hl, $c00
- ld de, wTileMap + 20 * 12
- call InitScreenTileBufferTransferParameters
- jp DelayFrame
+ ld a, b
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
-InitScreenTileBufferTransferParameters:: ; 18fc (0:18fc)
+ ld a, e
+ ld [H_VBCOPYSRC], a
ld a, d
- ld [H_VBCOPYBGSRC+1], a
- call GetRowColAddressBgMap
+ ld [H_VBCOPYSRC + 1], a
+
ld a, l
- ld [H_VBCOPYBGDEST], a ; $ffc3
+ ld [H_VBCOPYDEST], a
ld a, h
- ld [H_VBCOPYBGDEST+1], a
- ld a, c
- ld [H_VBCOPYBGNUMROWS], a ; $ffc5
- ld a, e
- ld [H_VBCOPYBGSRC], a ; $ffc1
- ret
-
-ClearScreen:: ; 190f (0:190f)
-; clears all tiles in the tilemap,
-; then wait three frames
- ld bc,$0168 ; tilemap size
- inc b
- ld hl,wTileMap ; TILEMAP_START
- ld a,$7F ; $7F is blank tile
-.loop
- ld [hli],a
- dec c
- jr nz,.loop
- dec b
- jr nz,.loop
- jp Delay3
-
-TextBoxBorder:: ; 1922 (0:1922)
-; draw a text box
-; upper-left corner at coordinates hl
-; height b
-; width c
-
- ; first row
- push hl
- ld a,"┌"
- ld [hli],a
- inc a ; horizontal border ─
- call NPlaceChar
- inc a ; upper-right border ┐
- ld [hl],a
-
- ; middle rows
- pop hl
- ld de,20
- add hl,de ; skip the top row
-
-.PlaceRow
- push hl
- ld a,"│"
- ld [hli],a
- ld a," "
- call NPlaceChar
- ld [hl],"│"
-
- pop hl
- ld de,20
- add hl,de ; move to next row
- dec b
- jr nz,.PlaceRow
+ ld [H_VBCOPYDEST + 1], a
- ; bottom row
- ld a,"└"
- ld [hli],a
- ld a,"─"
- call NPlaceChar
- ld [hl],"┘"
- ret
-;
-NPlaceChar:: ; 194f (0:194f)
-; place a row of width c of identical characters
- ld d,c
.loop
- ld [hli],a
- dec d
- jr nz,.loop
- ret
-
-PlaceString:: ; 1955 (0:1955)
- push hl
-PlaceNextChar:: ; 1956 (0:1956)
- ld a,[de]
-
- cp "@"
- jr nz,.PlaceText
- ld b,h
- ld c,l
- pop hl
- ret
-
-.PlaceText
- cp $4E
- jr nz,.next
- ld bc,$0028
- ld a,[$FFF6]
- bit 2,a
- jr z,.next2
- ld bc,$14
-.next2
- pop hl
- add hl,bc
- push hl
- jp Next19E8
-
-.next
- cp $4F
- jr nz,.next3
- pop hl
- FuncCoord 1, 16
- ld hl,Coord
- push hl
- jp Next19E8
-
-.next3 ; Check against a dictionary
- and a
- jp z,Char00
- cp $4C
- jp z,Char4C
- cp $4B
- jp z,Char4B
- cp $51
- jp z,Char51
- cp $49
- jp z,Char49
- cp $52
- jp z,Char52
- cp $53
- jp z,Char53
- cp $54
- jp z,Char54
- cp $5B
- jp z,Char5B
- cp $5E
- jp z,Char5E
- cp $5C
- jp z,Char5C
- cp $5D
- jp z,Char5D
- cp $55
- jp z,Char55
- cp $56
- jp z,Char56
- cp $57
- jp z,Char57
- cp $58
- jp z,Char58
- cp $4A
- jp z,Char4A
- cp $5F
- jp z,Char5F
- cp $59
- jp z,Char59
- cp $5A
- jp z,Char5A
- ld [hli],a
- call PrintLetterDelay
-Next19E8:: ; 19e8 (0:19e8)
- inc de
- jp PlaceNextChar
-
-Char00:: ; 19ec (0:19ec)
- ld b,h
- ld c,l
- pop hl
- ld de,Char00Text
- dec de
- ret
-
-Char00Text:: ; 0x19f4 “%d ERROR.”
- TX_FAR _Char00Text
- db "@"
-
-Char52:: ; 0x19f9 player’s name
- push de
- ld de,W_PLAYERNAME
- jr FinishDTE
-
-Char53:: ; 19ff (0:19ff) ; rival’s name
- push de
- ld de,W_RIVALNAME
- jr FinishDTE
-
-Char5D:: ; 1a05 (0:1a05) ; TRAINER
- push de
- ld de,Char5DText
- jr FinishDTE
-
-Char5C:: ; 1a0b (0:1a0b) ; TM
- push de
- ld de,Char5CText
- jr FinishDTE
-
-Char5B:: ; 1a11 (0:1a11) ; PC
- push de
- ld de,Char5BText
- jr FinishDTE
-
-Char5E:: ; 1a17 (0:1a17) ; ROCKET
- push de
- ld de,Char5EText
- jr FinishDTE
-
-Char54:: ; 1a1d (0:1a1d) ; POKé
- push de
- ld de,Char54Text
- jr FinishDTE
-
-Char56:: ; 1a23 (0:1a23) ; ……
- push de
- ld de,Char56Text
- jr FinishDTE
-
-Char4A:: ; 1a29 (0:1a29) ; PKMN
- push de
- ld de,Char4AText
- jr FinishDTE
-
-Char59:: ; 1a2f (0:1a2f)
-; depending on whose turn it is, print
-; enemy active monster’s name, prefixed with “Enemy ”
-; or
-; player active monster’s name
-; (like Char5A but flipped)
- ld a,[H_WHOSETURN]
- xor 1
- jr MonsterNameCharsCommon
-
-Char5A:: ; 1a35 (0:1a35)
-; depending on whose turn it is, print
-; player active monster’s name
-; or
-; enemy active monster’s name, prefixed with “Enemy ”
- ld a,[H_WHOSETURN]
-MonsterNameCharsCommon:: ; 1a37 (0:1a37)
- push de
- and a
- jr nz,.Enemy
- ld de,W_PLAYERMONNAME ; player active monster name
- jr FinishDTE
-
-.Enemy ; 1A40
- ; print “Enemy ”
- ld de,Char5AText
- call PlaceString
-
- ld h,b
- ld l,c
- ld de,W_ENEMYMONNAME ; enemy active monster name
-
-FinishDTE:: ; 1a4b (0:1a4b)
- call PlaceString
- ld h,b
- ld l,c
- pop de
- inc de
- jp PlaceNextChar
-
-Char5CText:: ; 1a55 (0:1a55)
- db "TM@"
-Char5DText:: ; 1a58 (0:1a58)
- db "TRAINER@"
-Char5BText:: ; 1a60 (0:1a60)
- db "PC@"
-Char5EText:: ; 1a63 (0:1a63)
- db "ROCKET@"
-Char54Text:: ; 1a6a (0:1a6a)
- db "POKé@"
-Char56Text:: ; 1a6f (0:1a6f)
- db "……@"
-Char5AText:: ; 1a72 (0:1a72)
- db "Enemy @"
-Char4AText:: ; 1a79 (0:1a79)
- db $E1,$E2,"@" ; PKMN
-
-Char55:: ; 1a7c (0:1a7c)
- push de
- ld b,h
- ld c,l
- ld hl,Char55Text
- call TextCommandProcessor
- ld h,b
- ld l,c
- pop de
- inc de
- jp PlaceNextChar
-
-Char55Text:: ; 1a8c (0:1a8c)
-; equivalent to Char4B
- TX_FAR _Char55Text
- db "@"
+ ld a, c
+ cp 8
+ jr nc, .keepgoing
-Char5F:: ; 1a91 (0:1a91)
-; ends a Pokédex entry
- ld [hl],"."
- pop hl
+.done
+ ld [H_VBCOPYSIZE], a
+ call DelayFrame
+ ld a, [$ff8b]
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
+ pop af
+ ld [H_AUTOBGTRANSFERENABLED], a
ret
-Char58:: ; 1a95 (0:1a95)
- ld a,[W_ISLINKBATTLE]
- cp 4
- jp z,Next1AA2
- ld a,$EE
- FuncCoord 18, 16
- ld [Coord],a
-Next1AA2:: ; 1aa2 (0:1aa2)
- call ProtectedDelay3
- call ManualTextScroll
- ld a,$7F
- FuncCoord 18, 16
- ld [Coord],a
-Char57:: ; 1aad (0:1aad)
- pop hl
- ld de,Char58Text
- dec de
- ret
+.keepgoing
+ ld a, 8
+ ld [H_VBCOPYSIZE], a
+ call DelayFrame
+ ld a, c
+ sub 8
+ ld c, a
+ jr .loop
-Char58Text:: ; 1ab3 (0:1ab3)
- db "@"
+CopyVideoDataDouble::
+; Wait for the next VBlank, then copy c 1bpp
+; tiles from b:de to hl, 8 tiles at a time.
+; This takes c/8 frames.
+ ld a, [H_AUTOBGTRANSFERENABLED]
+ push af
+ xor a ; disable auto-transfer while copying
+ ld [H_AUTOBGTRANSFERENABLED], a
+ ld a, [H_LOADEDROMBANK]
+ ld [$ff8b], a
-Char51:: ; 1ab4 (0:1ab4)
- push de
- ld a,$EE
- FuncCoord 18, 16
- ld [Coord],a
- call ProtectedDelay3
- call ManualTextScroll
- FuncCoord 1, 13
- ld hl,Coord
- ld bc,$0412
- call ClearScreenArea
- ld c,$14
- call DelayFrames
- pop de
- FuncCoord 1, 14
- ld hl,Coord
- jp Next19E8
+ ld a, b
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
-Char49:: ; 1ad5 (0:1ad5)
- push de
- ld a,$EE
- FuncCoord 18, 16
- ld [Coord],a
- call ProtectedDelay3
- call ManualTextScroll
- FuncCoord 1, 10
- ld hl,Coord
- ld bc,$0712
- call ClearScreenArea
- ld c,$14
- call DelayFrames
- pop de
- pop hl
- FuncCoord 1, 11
- ld hl,Coord
- push hl
- jp Next19E8
+ ld a, e
+ ld [H_VBCOPYDOUBLESRC], a
+ ld a, d
+ ld [H_VBCOPYDOUBLESRC + 1], a
-Char4B:: ; 1af8 (0:1af8)
- ld a,$EE
- FuncCoord 18, 16
- ld [Coord],a
- call ProtectedDelay3
- push de
- call ManualTextScroll
- pop de
- ld a,$7F
- FuncCoord 18, 16
- ld [Coord],a
- ;fall through
-Char4C:: ; 1b0a (0:1b0a)
- push de
- call Next1B18
- call Next1B18
- FuncCoord 1, 16
- ld hl,Coord
- pop de
- jp Next19E8
+ ld a, l
+ ld [H_VBCOPYDOUBLEDEST], a
+ ld a, h
+ ld [H_VBCOPYDOUBLEDEST + 1], a
-Next1B18:: ; 1b18 (0:1b18)
- FuncCoord 0, 14
- ld hl,Coord
- FuncCoord 0, 13
- ld de,Coord
- ld b,$3C
-.next
- ld a,[hli]
- ld [de],a
- inc de
- dec b
- jr nz,.next
- FuncCoord 1, 16
- ld hl,Coord
- ld a,$7F
- ld b,$12
-.next2
- ld [hli],a
- dec b
- jr nz,.next2
+.loop
+ ld a, c
+ cp 8
+ jr nc, .keepgoing
- ; wait five frames
- ld b,5
-.WaitFrame
+.done
+ ld [H_VBCOPYDOUBLESIZE], a
call DelayFrame
- dec b
- jr nz,.WaitFrame
-
- ret
-
-ProtectedDelay3:: ; 1b3a (0:1b3a)
- push bc
- call Delay3
- pop bc
- ret
-
-TextCommandProcessor:: ; 1b40 (0:1b40)
- ld a,[wd358]
- push af
- set 1,a
- ld e,a
- ld a,[$fff4]
- xor e
- ld [wd358],a
- ld a,c
- ld [wcc3a],a
- ld a,b
- ld [wcc3b],a
-
-NextTextCommand:: ; 1b55 (0:1b55)
- ld a,[hli]
- cp a, "@" ; terminator
- jr nz,.doTextCommand
+ ld a, [$ff8b]
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
pop af
- ld [wd358],a
+ ld [H_AUTOBGTRANSFERENABLED], a
ret
-.doTextCommand
- push hl
- cp a,$17
- jp z,TextCommand17
- cp a,$0e
- jp nc,TextCommand0B ; if a != 0x17 and a >= 0xE, go to command 0xB
-; if a < 0xE, use a jump table
- ld hl,TextCommandJumpTable
- push bc
- add a
- ld b,$00
- ld c,a
- add hl,bc
- pop bc
- ld a,[hli]
- ld h,[hl]
- ld l,a
- jp [hl]
-
-; draw box
-; 04AAAABBCC
-; AAAA = address of upper left corner
-; BB = height
-; CC = width
-TextCommand04:: ; 1b78 (0:1b78)
- pop hl
- ld a,[hli]
- ld e,a
- ld a,[hli]
- ld d,a
- ld a,[hli]
- ld b,a
- ld a,[hli]
- ld c,a
- push hl
- ld h,d
- ld l,e
- call TextBoxBorder
- pop hl
- jr NextTextCommand
-
-; place string inline
-; 00{string}
-TextCommand00:: ; 1b8a (0:1b8a)
- pop hl
- ld d,h
- ld e,l
- ld h,b
- ld l,c
- call PlaceString
- ld h,d
- ld l,e
- inc hl
- jr NextTextCommand
-
-; place string from RAM
-; 01AAAA
-; AAAA = address of string
-TextCommand01:: ; 1b97 (0:1b97)
- pop hl
- ld a,[hli]
- ld e,a
- ld a,[hli]
- ld d,a
- push hl
- ld h,b
- ld l,c
- call PlaceString
- pop hl
- jr NextTextCommand
-
-; print BCD number
-; 02AAAABB
-; AAAA = address of BCD number
-; BB
-; bits 0-4 = length in bytes
-; bits 5-7 = unknown flags
-TextCommand02:: ; 1ba5 (0:1ba5)
- pop hl
- ld a,[hli]
- ld e,a
- ld a,[hli]
- ld d,a
- ld a,[hli]
- push hl
- ld h,b
- ld l,c
- ld c,a
- call PrintBCDNumber
- ld b,h
- ld c,l
- pop hl
- jr NextTextCommand
-
-; repoint destination address
-; 03AAAA
-; AAAA = new destination address
-TextCommand03:: ; 1bb7 (0:1bb7)
- pop hl
- ld a,[hli]
- ld [wcc3a],a
- ld c,a
- ld a,[hli]
- ld [wcc3b],a
- ld b,a
- jp NextTextCommand
-
-; repoint destination to second line of dialogue text box
-; 05
-; (no arguments)
-TextCommand05:: ; 1bc5 (0:1bc5)
- pop hl
- FuncCoord 1, 16
- ld bc,Coord ; address of second line of dialogue text box
- jp NextTextCommand
-
-; blink arrow and wait for A or B to be pressed
-; 06
-; (no arguments)
-TextCommand06:: ; 1bcc (0:1bcc)
- ld a,[W_ISLINKBATTLE]
- cp a,$04
- jp z,TextCommand0D
- ld a,$ee ; down arrow
- FuncCoord 18, 16
- ld [Coord],a ; place down arrow in lower right corner of dialogue text box
- push bc
- call ManualTextScroll ; blink arrow and wait for A or B to be pressed
- pop bc
- ld a," "
- FuncCoord 18, 16
- ld [Coord],a ; overwrite down arrow with blank space
- pop hl
- jp NextTextCommand
-
-; scroll text up one line
-; 07
-; (no arguments)
-TextCommand07:: ; 1be7 (0:1be7)
- ld a," "
- FuncCoord 18, 16
- ld [Coord],a ; place blank space in lower right corner of dialogue text box
- call Next1B18 ; scroll up text
- call Next1B18
- pop hl
- FuncCoord 1, 16
- ld bc,Coord ; address of second line of dialogue text box
- jp NextTextCommand
-
-; execute asm inline
-; 08{code}
-TextCommand08:: ; 1bf9 (0:1bf9)
- pop hl
- ld de,NextTextCommand
- push de ; return address
- jp [hl]
-
-; print decimal number (converted from binary number)
-; 09AAAABB
-; AAAA = address of number
-; BB
-; bits 0-3 = how many digits to display
-; bits 4-7 = how long the number is in bytes
-TextCommand09:: ; 1bff (0:1bff)
- pop hl
- ld a,[hli]
- ld e,a
- ld a,[hli]
- ld d,a
- ld a,[hli]
- push hl
- ld h,b
- ld l,c
- ld b,a
- and a,$0f
- ld c,a
- ld a,b
- and a,$f0
- swap a
- set 6,a
- ld b,a
- call PrintNumber
- ld b,h
- ld c,l
- pop hl
- jp NextTextCommand
-
-; wait half a second if the user doesn't hold A or B
-; 0A
-; (no arguments)
-TextCommand0A:: ; 1c1d (0:1c1d)
- push bc
- call Joypad
- ld a,[hJoyHeld]
- and a,%00000011 ; A and B buttons
- jr nz,.skipDelay
- ld c,30
- call DelayFrames
-.skipDelay
- pop bc
- pop hl
- jp NextTextCommand
-; plays sounds
-; this actually handles various command ID's, not just 0B
-; (no arguments)
-TextCommand0B:: ; 1c31 (0:1c31)
- pop hl
- push bc
- dec hl
- ld a,[hli]
- ld b,a ; b = command number that got us here
- push hl
- ld hl,TextCommandSounds
-.loop
- ld a,[hli]
- cp b
- jr z,.matchFound
- inc hl
+.keepgoing
+ ld a, 8
+ ld [H_VBCOPYDOUBLESIZE], a
+ call DelayFrame
+ ld a, c
+ sub 8
+ ld c, a
jr .loop
-.matchFound
- cp a,$14
- jr z,.pokemonCry
- cp a,$15
- jr z,.pokemonCry
- cp a,$16
- jr z,.pokemonCry
- ld a,[hl]
- call PlaySound
- call WaitForSoundToFinish
- pop hl
- pop bc
- jp NextTextCommand
-.pokemonCry
- push de
- ld a,[hl]
- call PlayCry
- pop de
- pop hl
- pop bc
- jp NextTextCommand
-
-; format: text command ID, sound ID or cry ID
-TextCommandSounds:: ; 1c64 (0:1c64)
- db $0B,(SFX_02_3a - SFX_Headers_02) / 3
- db $12,(SFX_02_46 - SFX_Headers_02) / 3
- db $0E,(SFX_02_41 - SFX_Headers_02) / 3
- db $0F,(SFX_02_3a - SFX_Headers_02) / 3
- db $10,(SFX_02_3b - SFX_Headers_02) / 3
- db $11,(SFX_02_42 - SFX_Headers_02) / 3
- db $13,(SFX_02_44 - SFX_Headers_02) / 3
- db $14,NIDORINA ; used in OakSpeech
- db $15,PIDGEOT ; used in SaffronCityText12
- db $16,DEWGONG ; unused?
-
-; draw ellipses
-; 0CAA
-; AA = number of ellipses to draw
-TextCommand0C:: ; 1c78 (0:1c78)
- pop hl
- ld a,[hli]
- ld d,a
- push hl
- ld h,b
- ld l,c
-.loop
- ld a,$75 ; ellipsis
- ld [hli],a
- push de
- call Joypad
- pop de
- ld a,[hJoyHeld] ; joypad state
- and a,%00000011 ; is A or B button pressed?
- jr nz,.skipDelay ; if so, skip the delay
- ld c,10
- call DelayFrames
-.skipDelay
- dec d
- jr nz,.loop
- ld b,h
- ld c,l
- pop hl
- jp NextTextCommand
-; wait for A or B to be pressed
-; 0D
-; (no arguments)
-TextCommand0D:: ; 1c9a (0:1c9a)
+ClearScreenArea::
+; Clear tilemap area cxb at hl.
+ ld a, $7f ; blank tile
+ ld de, 20 ; screen width
+.y
+ push hl
push bc
- call ManualTextScroll ; wait for A or B to be pressed
+.x
+ ld [hli], a
+ dec c
+ jr nz, .x
pop bc
pop hl
- jp NextTextCommand
-
-; process text commands in another ROM bank
-; 17AAAABB
-; AAAA = address of text commands
-; BB = bank
-TextCommand17:: ; 1ca3 (0:1ca3)
- pop hl
- ld a,[H_LOADEDROMBANK]
- push af
- ld a,[hli]
- ld e,a
- ld a,[hli]
- ld d,a
- ld a,[hli]
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- push hl
- ld l,e
- ld h,d
- call TextCommandProcessor
- pop hl
- pop af
- ld [H_LOADEDROMBANK],a
- ld [$2000],a
- jp NextTextCommand
-
-TextCommandJumpTable:: ; 1cc1 (0:1cc1)
- dw TextCommand00
- dw TextCommand01
- dw TextCommand02
- dw TextCommand03
- dw TextCommand04
- dw TextCommand05
- dw TextCommand06
- dw TextCommand07
- dw TextCommand08
- dw TextCommand09
- dw TextCommand0A
- dw TextCommand0B
- dw TextCommand0C
- dw TextCommand0D
-
-; this function seems to be used only once
-; it store the address of a row and column of the VRAM background map in hl
-; INPUT: h - row, l - column, b - high byte of background tile map address in VRAM
-GetRowColAddressBgMap:: ; 1cdd (0:1cdd)
- xor a
- srl h
- rr a
- srl h
- rr a
- srl h
- rr a
- or l
- ld l,a
- ld a,b
- or h
- ld h,a
- ret
-
-; clears a VRAM background map with blank space tiles
-; INPUT: h - high byte of background tile map address in VRAM
-ClearBgMap:: ; 1cf0 (0:1cf0)
- ld a," "
- jr .next
- ld a,l
-.next
- ld de,$400 ; size of VRAM background map
- ld l,e
-.loop
- ld [hli],a
- dec e
- jr nz,.loop
- dec d
- jr nz,.loop
- ret
-
-; When the player takes a step, a row or column of 2x2 tile blocks at the edge
-; of the screen toward which they moved is exposed and has to be redrawn.
-; This function does the redrawing.
-RedrawExposedScreenEdge:: ; 1d01 (0:1d01)
- ld a,[H_SCREENEDGEREDRAW]
- and a
- ret z
- ld b,a
- xor a
- ld [H_SCREENEDGEREDRAW],a
- dec b
- jr nz,.redrawRow
-.redrawColumn
- ld hl,wScreenEdgeTiles
- ld a,[H_SCREENEDGEREDRAWADDR]
- ld e,a
- ld a,[H_SCREENEDGEREDRAWADDR + 1]
- ld d,a
- ld c,18 ; screen height
-.loop1
- ld a,[hli]
- ld [de],a
- inc de
- ld a,[hli]
- ld [de],a
- ld a,31
- add e
- ld e,a
- jr nc,.noCarry
- inc d
-.noCarry
-; the following 4 lines wrap us from bottom to top if necessary
- ld a,d
- and a,$03
- or a,$98
- ld d,a
- dec c
- jr nz,.loop1
- xor a
- ld [H_SCREENEDGEREDRAW],a
- ret
-.redrawRow
- ld hl,wScreenEdgeTiles
- ld a,[H_SCREENEDGEREDRAWADDR]
- ld e,a
- ld a,[H_SCREENEDGEREDRAWADDR + 1]
- ld d,a
- push de
- call .drawHalf ; draw upper half
- pop de
- ld a,32 ; width of VRAM background map
- add e
- ld e,a
- ; draw lower half
-.drawHalf
- ld c,10
-.loop2
- ld a,[hli]
- ld [de],a
- inc de
- ld a,[hli]
- ld [de],a
- ld a,e
- inc a
-; the following 6 lines wrap us from the right edge to the left edge if necessary
- and a,$1f
- ld b,a
- ld a,e
- and a,$e0
- or b
- ld e,a
- dec c
- jr nz,.loop2
- ret
-
-; This function automatically transfers tile number data from the tile map at
-; wTileMap to VRAM during V-blank. Note that it only transfers one third of the
-; background per V-blank. It cycles through which third it draws.
-; This transfer is turned off when walking around the map, but is turned
-; on when talking to sprites, battling, using menus, etc. This is because
-; the above function, RedrawExposedScreenEdge, is used when walking to
-; improve efficiency.
-AutoBgMapTransfer:: ; 1d57 (0:1d57)
- ld a,[H_AUTOBGTRANSFERENABLED]
- and a
- ret z
- ld hl,[sp + 0]
- ld a,h
- ld [H_SPTEMP],a
- ld a,l
- ld [H_SPTEMP + 1],a ; save stack pinter
- ld a,[H_AUTOBGTRANSFERPORTION]
- and a
- jr z,.transferTopThird
- dec a
- jr z,.transferMiddleThird
-.transferBottomThird
- FuncCoord 0,12
- ld hl,Coord
- ld sp,hl
- ld a,[H_AUTOBGTRANSFERDEST + 1]
- ld h,a
- ld a,[H_AUTOBGTRANSFERDEST]
- ld l,a
- ld de,(12 * 32)
- add hl,de
- xor a ; TRANSFERTOP
- jr .doTransfer
-.transferTopThird
- FuncCoord 0,0
- ld hl,Coord
- ld sp,hl
- ld a,[H_AUTOBGTRANSFERDEST + 1]
- ld h,a
- ld a,[H_AUTOBGTRANSFERDEST]
- ld l,a
- ld a,TRANSFERMIDDLE
- jr .doTransfer
-.transferMiddleThird
- FuncCoord 0,6
- ld hl,Coord
- ld sp,hl
- ld a,[H_AUTOBGTRANSFERDEST + 1]
- ld h,a
- ld a,[H_AUTOBGTRANSFERDEST]
- ld l,a
- ld de,(6 * 32)
- add hl,de
- ld a,TRANSFERBOTTOM
-.doTransfer
- ld [H_AUTOBGTRANSFERPORTION],a ; store next portion
- ld b,6
-
-; unrolled loop and using pop for speed
-TransferBgRows:: ; 1d9e (0:1d9e)
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- inc l
- pop de
- ld [hl],e
- inc l
- ld [hl],d
- ld a,13
- add l
- ld l,a
- jr nc,.noCarry
- inc h
-.noCarry
+ add hl, de
dec b
- jr nz,TransferBgRows
- ld a,[H_SPTEMP]
- ld h,a
- ld a,[H_SPTEMP + 1]
- ld l,a
- ld sp,hl ; restore stack pointer
+ jr nz, .y
ret
-; Copies [H_VBCOPYBGNUMROWS] rows from H_VBCOPYBGSRC to H_VBCOPYBGDEST.
-; If H_VBCOPYBGSRC is XX00, the transfer is disabled.
-VBlankCopyBgMap:: ; 1de1 (0:1de1)
- ld a,[H_VBCOPYBGSRC] ; doubles as enabling byte
- and a
- ret z
- ld hl,[sp + 0]
- ld a,h
- ld [H_SPTEMP],a
- ld a,l
- ld [H_SPTEMP + 1],a ; save stack pointer
- ld a,[H_VBCOPYBGSRC]
- ld l,a
- ld a,[H_VBCOPYBGSRC + 1]
- ld h,a
- ld sp,hl
- ld a,[H_VBCOPYBGDEST]
- ld l,a
- ld a,[H_VBCOPYBGDEST + 1]
- ld h,a
- ld a,[H_VBCOPYBGNUMROWS]
- ld b,a
- xor a
- ld [H_VBCOPYBGSRC],a ; disable transfer so it doesn't continue next V-blank
- jr TransferBgRows
-
-
-VBlankCopyDouble::
-; Copy [H_VBCOPYDOUBLESIZE] 1bpp tiles
-; from H_VBCOPYDOUBLESRC to H_VBCOPYDOUBLEDEST.
-
-; While we're here, convert to 2bpp.
-; The process is straightforward:
-; copy each byte twice.
-
- ld a, [H_VBCOPYDOUBLESIZE]
- and a
- ret z
-
- ld hl, [sp + 0]
- ld a, h
- ld [H_SPTEMP], a
- ld a, l
- ld [H_SPTEMP + 1], a
+CopyScreenTileBufferToVRAM::
+; Copy wTileMap to the BG Map starting at b * $100.
+; This is done in thirds of 6 rows, so it takes 3 frames.
- ld a, [H_VBCOPYDOUBLESRC]
- ld l, a
- ld a, [H_VBCOPYDOUBLESRC + 1]
- ld h, a
- ld sp, hl
-
- ld a, [H_VBCOPYDOUBLEDEST]
- ld l, a
- ld a, [H_VBCOPYDOUBLEDEST + 1]
- ld h, a
+ ld c, 6
- ld a, [H_VBCOPYDOUBLESIZE]
- ld b, a
- xor a ; transferred
- ld [H_VBCOPYDOUBLESIZE], a
-
-.loop
- rept 3
- pop de
- ld [hl], e
- inc l
- ld [hl], e
- inc l
- ld [hl], d
- inc l
- ld [hl], d
- inc l
- endr
+ ld hl, $600 * 0
+ ld de, wTileMap + 20 * 6 * 0
+ call .setup
+ call DelayFrame
- pop de
- ld [hl], e
- inc l
- ld [hl], e
- inc l
- ld [hl], d
- inc l
- ld [hl], d
- inc hl
- dec b
- jr nz, .loop
+ ld hl, $600 * 1
+ ld de, wTileMap + 20 * 6 * 1
+ call .setup
+ call DelayFrame
- ld a, l
- ld [H_VBCOPYDOUBLEDEST], a
- ld a, h
- ld [H_VBCOPYDOUBLEDEST + 1], a
+ ld hl, $600 * 2
+ ld de, wTileMap + 20 * 6 * 2
+ call .setup
+ jp DelayFrame
- ld hl, [sp + 0]
+.setup
+ ld a, d
+ ld [H_VBCOPYBGSRC+1], a
+ call GetRowColAddressBgMap
ld a, l
- ld [H_VBCOPYDOUBLESRC], a
+ ld [H_VBCOPYBGDEST], a
ld a, h
- ld [H_VBCOPYDOUBLESRC + 1], a
-
- ld a, [H_SPTEMP]
- ld h, a
- ld a, [H_SPTEMP + 1]
- ld l, a
- ld sp, hl
-
+ ld [H_VBCOPYBGDEST+1], a
+ ld a, c
+ ld [H_VBCOPYBGNUMROWS], a
+ ld a, e
+ ld [H_VBCOPYBGSRC], a
ret
-
-VBlankCopy::
-; Copy [H_VBCOPYSIZE] 2bpp tiles
-; from H_VBCOPYSRC to H_VBCOPYDEST.
-
-; Source and destination addresses
-; are updated, so transfer can
-; continue in subsequent calls.
-
- ld a, [H_VBCOPYSIZE]
- and a
- ret z
-
- ld hl, [sp + 0]
- ld a, h
- ld [H_SPTEMP], a
- ld a, l
- ld [H_SPTEMP + 1], a
-
- ld a, [H_VBCOPYSRC]
- ld l, a
- ld a, [H_VBCOPYSRC + 1]
- ld h, a
- ld sp, hl
-
- ld a, [H_VBCOPYDEST]
- ld l, a
- ld a, [H_VBCOPYDEST + 1]
- ld h, a
-
- ld a, [H_VBCOPYSIZE]
- ld b, a
- xor a ; transferred
- ld [H_VBCOPYSIZE], a
-
+ClearScreen::
+; Clear wTileMap, then wait
+; for the bg map to update.
+ ld bc, 20 * 18
+ inc b
+ ld hl, wTileMap
+ ld a, $7f
.loop
- rept 7
- pop de
- ld [hl], e
- inc l
- ld [hl], d
- inc l
- endr
-
- pop de
- ld [hl], e
- inc l
- ld [hl], d
- inc hl
- dec b
- jr nz, .loop
-
- ld a, l
- ld [H_VBCOPYDEST], a
- ld a, h
- ld [H_VBCOPYDEST + 1], a
-
- ld hl, [sp + 0]
- ld a, l
- ld [H_VBCOPYSRC], a
- ld a, h
- ld [H_VBCOPYSRC + 1], a
-
- ld a, [H_SPTEMP]
- ld h, a
- ld a, [H_SPTEMP + 1]
- ld l, a
- ld sp, hl
-
- ret
-
-
-UpdateMovingBgTiles::
-; Animate water and flower
-; tiles in the overworld.
-
- ld a, [$ffd7]
- and a
- ret z
-
- ld a, [$ffd8]
- inc a
- ld [$ffd8], a
- cp 20
- ret c
- cp 21
- jr z, .flower
-
- ld hl, vTileset + $14 * $10
- ld c, $10
-
- ld a, [wd085]
- inc a
- and 7
- ld [wd085], a
-
- and 4
- jr nz, .left
-.right
- ld a, [hl]
- rrca
ld [hli], a
dec c
- jr nz, .right
- jr .done
-.left
- ld a, [hl]
- rlca
- ld [hli], a
- dec c
- jr nz, .left
-.done
- ld a, [$ffd7]
- rrca
- ret nc
- xor a
- ld [$ffd8], a
- ret
-
-.flower
- xor a
- ld [$ffd8], a
-
- ld a, [wd085]
- and 3
- cp 2
- ld hl, FlowerTile1
- jr c, .copy
- ld hl, FlowerTile2
- jr z, .copy
- ld hl, FlowerTile3
-.copy
- ld de, vTileset + $3 * $10
- ld c, $10
-.loop
- ld a, [hli]
- ld [de], a
- inc de
- dec c
jr nz, .loop
- ret
-
-FlowerTile1: INCBIN "gfx/tilesets/flower/flower1.2bpp"
-FlowerTile2: INCBIN "gfx/tilesets/flower/flower2.2bpp"
-FlowerTile3: INCBIN "gfx/tilesets/flower/flower3.2bpp"
-
-
-SoftReset::
- call StopAllSounds
- call GBPalWhiteOut
- ld c, $20
- call DelayFrames
- ; fallthrough
-
-Init::
-; Program init.
-
-rLCDC_DEFAULT EQU %11100011
-; * LCD enabled
-; * Window tile map at $9C00
-; * Window display enabled
-; * BG and window tile data at $8800
-; * BG tile map at $9800
-; * 8x8 OBJ size
-; * OBJ display enabled
-; * BG display enabled
-
- di
-
- xor a
- ld [rIF], a
- ld [rIE], a
- ld [$ff43], a
- ld [$ff42], a
- ld [$ff01], a
- ld [$ff02], a
- ld [$ff4b], a
- ld [$ff4a], a
- ld [$ff06], a
- ld [$ff07], a
- ld [$ff47], a
- ld [$ff48], a
- ld [$ff49], a
-
- ld a, rLCDC_ENABLE_MASK
- ld [rLCDC], a
- call DisableLCD
-
- ld sp, wStack
-
- ld hl, wc000 ; start of WRAM
- ld bc, $2000 ; size of WRAM
-.loop
- ld [hl], 0
- inc hl
- dec bc
- ld a, b
- or c
- jr nz, .loop
-
- call ClearVram
-
- ld hl, $ff80
- ld bc, $ffff - $ff80
- call FillMemory
-
- call ClearSprites
-
- ld a, Bank(WriteDMACodeToHRAM)
- ld [H_LOADEDROMBANK], a
- ld [MBC3RomBank], a
- call WriteDMACodeToHRAM
-
- xor a
- ld [$ffd7], a
- ld [$ff41], a
- ld [$ffae], a
- ld [$ffaf], a
- ld [$ff0f], a
- ld a, 1 << VBLANK + 1 << TIMER + 1 << SERIAL
- ld [rIE], a
-
- ld a, 144 ; move the window off-screen
- ld [$ffb0], a
- ld [rWY], a
- ld a, 7
- ld [rWX], a
-
- ld a, $ff
- ld [$ffaa], a
-
- ld h, vBGMap0 / $100
- call ClearBgMap
- ld h, vBGMap1 / $100
- call ClearBgMap
-
- ld a, rLCDC_DEFAULT
- ld [rLCDC], a
- ld a, 16
- ld [hSoftReset], a
- call StopAllSounds
-
- ei
-
- ld a, $40 ; PREDEF_SGB_BORDER
- call Predef
-
- ld a, $1f
- ld [wc0ef], a
- ld [wc0f0], a
- ld a, $9c
- ld [$ffbd], a
- xor a
- ld [$ffbc], a
- dec a
- ld [wcfcb], a
-
- ld a, $32 ; PREDEF_INTRO
- call Predef
-
- call DisableLCD
- call ClearVram
- call GBPalNormal
- call ClearSprites
- ld a, rLCDC_DEFAULT
- ld [rLCDC], a
-
- jp SetDefaultNamesBeforeTitlescreen
-
-ClearVram:
- ld hl, $8000
- ld bc, $2000
- xor a
- jp FillMemory
-
-
-StopAllSounds::
- ld a, Bank(Func_9876)
- ld [wc0ef], a
- ld [wc0f0], a
- xor a
- ld [wMusicHeaderPointer], a
- ld [wc0ee], a
- ld [wcfca], a
- dec a
- jp PlaySound
-
-
-VBlank::
-
- push af
- push bc
- push de
- push hl
-
- ld a, [H_LOADEDROMBANK]
- ld [wd122], a
-
- ld a, [$ffae]
- ld [rSCX], a
- ld a, [$ffaf]
- ld [rSCY], a
-
- ld a, [wd0a0]
- and a
- jr nz, .ok
- ld a, [$ffb0]
- ld [rWY], a
-.ok
-
- call AutoBgMapTransfer
- call VBlankCopyBgMap
- call RedrawExposedScreenEdge
- call VBlankCopy
- call VBlankCopyDouble
- call UpdateMovingBgTiles
- call $ff80 ; hOAMDMA
- ld a, Bank(PrepareOAMData)
- ld [H_LOADEDROMBANK], a
- ld [MBC3RomBank], a
- call PrepareOAMData
-
- ; VBlank-sensitive operations end.
-
- call Random
-
- ld a, [H_VBLANKOCCURRED]
- and a
- jr z, .vblanked
- xor a
- ld [H_VBLANKOCCURRED], a
-.vblanked
-
- ld a, [H_FRAMECOUNTER]
- and a
- jr z, .decced
- dec a
- ld [H_FRAMECOUNTER], a
-.decced
-
- call Func_28cb
-
- ld a, [wc0ef] ; music ROM bank
- ld [H_LOADEDROMBANK], a
- ld [MBC3RomBank], a
-
- cp BANK(Func_9103)
- jr nz, .notbank2
-.bank2
- call Func_9103
- jr .afterMusic
-.notbank2
- cp 8
- jr nz, .bank1F
-.bank8
- call Func_2136e
- call Func_21879
- jr .afterMusic
-.bank1F
- call Func_7d177
-.afterMusic
-
- callba Func_18dee ; keep track of time played
-
- ld a, [$fff9]
- and a
- call z, ReadJoypad
-
- ld a, [wd122]
- ld [H_LOADEDROMBANK], a
- ld [MBC3RomBank], a
-
- pop hl
- pop de
- pop bc
- pop af
- reti
-
-
-DelayFrame::
-; Wait for the next vblank interrupt.
-; As a bonus, this saves battery.
-
-NOT_VBLANKED EQU 1
-
- ld a, NOT_VBLANKED
- ld [H_VBLANKOCCURRED], a
-.halt
- ; XXX this is a hack--rgbasm adds
- ; a nop after halts by default.
- db $76 ; halt
-
- ld a, [H_VBLANKOCCURRED]
- and a
- jr nz, .halt
- ret
-
-
-; These routines manage gradual fading
-; (e.g., entering a doorway)
-LoadGBPal:: ; 20ba (0:20ba)
- ld a,[wd35d] ;tells if cur.map is dark (requires HM5_FLASH?)
- ld b,a
- ld hl,GBPalTable_00 ;16
- ld a,l
- sub b
- ld l,a
- jr nc,.jr0
- dec h
-.jr0
- ld a,[hli]
- ld [rBGP],a
- ld a,[hli]
- ld [rOBP0],a
- ld a,[hli]
- ld [rOBP1],a
- ret
-
-GBFadeOut1:: ; 20d1 (0:20d1)
- ld hl,IncGradGBPalTable_01 ;0d
- ld b,$04
- jr GBFadeOutCommon
-
-GBFadeOut2:: ; 20d8 (0:20d8)
- ld hl,IncGradGBPalTable_02 ;1c
- ld b,$03
-
-GBFadeOutCommon:: ; 20dd (0:20dd)
- ld a,[hli]
- ld [rBGP],a
- ld a,[hli]
- ld [rOBP0],a
- ld a,[hli]
- ld [rOBP1],a
- ld c,8
- call DelayFrames
dec b
- jr nz,GBFadeOutCommon
- ret
+ jr nz, .loop
+ jp Delay3
-GBFadeIn1:: ; 20ef (0:20ef)
- ld hl,DecGradGBPalTable_01 ;18
- ld b,$04
- jr GBFadeInCommon
-GBFadeIn2:: ; 20f6 (0:20f6)
- ld hl,DecGradGBPalTable_02 ;21
- ld b,$03
+INCLUDE "home/text.asm"
+INCLUDE "home/vcopy.asm"
+INCLUDE "home/init.asm"
+INCLUDE "home/vblank.asm"
+INCLUDE "home/fade.asm"
-GBFadeInCommon:: ; 20fb (0:20fb)
- ld a,[hld]
- ld [rOBP1],a
- ld a,[hld]
- ld [rOBP0],a
- ld a,[hld]
- ld [rBGP],a
- ld c,8
- call DelayFrames
- dec b
- jr nz,GBFadeInCommon
- ret
-
-IncGradGBPalTable_01:: ; 210d (0:210d)
- db %11111111 ;BG Pal
- db %11111111 ;OBJ Pal 1
- db %11111111 ;OBJ Pal 2
- ;and so on...
- db %11111110
- db %11111110
- db %11111000
-
- db %11111001
- db %11100100
- db %11100100
-GBPalTable_00:: ; 2116 (0:2116)
- db %11100100
- db %11010000
-DecGradGBPalTable_01:: ; 2118 (0:2118)
- db %11100000
- ;19
- db %11100100
- db %11010000
- db %11100000
-IncGradGBPalTable_02:: ; 211c (0:211c)
- db %10010000
- db %10000000
- db %10010000
-
- db %01000000
- db %01000000
-DecGradGBPalTable_02:: ; 2121 (0:2121)
- db %01000000
-
- db %00000000
- db %00000000
- db %00000000
Serial:: ; 2125 (0:2125)
push af
@@ -5509,193 +1454,14 @@ Func_22fa:: ; 22fa (0:22fa)
ld [$ff02], a
ret
+
; timer interrupt is apparently not invoked anyway
Timer:: ; 2306 (0:2306)
reti
-Func_2307:: ; 2307 (0:2307)
- call WaitForSoundToFinish
- xor a
- ld c, a
- ld d, a
- ld [wcfca], a
- jr asm_2324
-Func_2312:: ; 2312 (0:2312)
- ld c, $a
- ld d, $0
- ld a, [wd72e]
- bit 5, a
- jr z, asm_2324
- xor a
- ld [wcfca], a
- ld c, $8
- ld d, c
-asm_2324:: ; 2324 (0:2324)
- ld a, [wd700]
- and a
- jr z, .asm_2343
- cp $2
- jr z, .asm_2332
- ld a, MUSIC_BIKE_RIDING
- jr .asm_2334
-.asm_2332
- ld a, MUSIC_SURFING
-.asm_2334
- ld b, a
- ld a, d
- and a
- ld a, Bank(Func_7d8ea)
- jr nz, .asm_233e
- ld [wc0ef], a
-.asm_233e
- ld [wc0f0], a
- jr .asm_234c
-.asm_2343
- ld a, [wd35b]
- ld b, a
- call Func_2385
- jr c, .asm_2351
-.asm_234c
- ld a, [wcfca]
- cp b
- ret z
-.asm_2351
- ld a, c
- ld [wMusicHeaderPointer], a
- ld a, b
- ld [wcfca], a
- ld [wc0ee], a
- jp PlaySound
-
-Func_235f:: ; 235f (0:235f)
- ld a, [wc0ef]
- ld b, a
- cp $2
- jr nz, .checkForBank08
-.bank02
- ld hl, Func_9103
- jr .asm_2378
-.checkForBank08
- cp $8
- jr nz, .bank1F
-.bank08
- ld hl, Func_21879
- jr .asm_2378
-.bank1F
- ld hl, Func_7d177
-.asm_2378
- ld c, $6
-.asm_237a
- push bc
- push hl
- call Bankswitch
- pop hl
- pop bc
- dec c
- jr nz, .asm_237a
- ret
-
-Func_2385:: ; 2385 (0:2385)
- ld a, [wd35c]
- ld e, a
- ld a, [wc0ef]
- cp e
- jr nz, .asm_2394
- ld [wc0f0], a
- and a
- ret
-.asm_2394
- ld a, c
- and a
- ld a, e
- jr nz, .asm_239c
- ld [wc0ef], a
-.asm_239c
- ld [wc0f0], a
- scf
- ret
+INCLUDE "home/audio.asm"
-PlayMusic:: ; 23a1 (0:23a1)
- ld b, a
- ld [wc0ee], a
- xor a
- ld [wMusicHeaderPointer], a
- ld a, c
- ld [wc0ef], a
- ld [wc0f0], a
- ld a, b
-
-; plays music specified by a. If value is $ff, music is stopped
-PlaySound:: ; 23b1 (0:23b1)
- push hl
- push de
- push bc
- ld b, a
- ld a, [wc0ee]
- and a
- jr z, .asm_23c8
- xor a
- ld [wc02a], a
- ld [wc02b], a
- ld [wc02c], a
- ld [wc02d], a
-.asm_23c8
- ld a, [wMusicHeaderPointer]
- and a
- jr z, .asm_23e3
- ld a, [wc0ee]
- and a
- jr z, .asm_2425
- xor a
- ld [wc0ee], a
- ld a, [wcfca]
- cp $ff
- jr nz, .asm_2414
- xor a
- ld [wMusicHeaderPointer], a
-.asm_23e3
- xor a
- ld [wc0ee], a
- ld a, [H_LOADEDROMBANK]
- ld [$ffb9], a
- ld a, [wc0ef]
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
- cp $2
- jr nz, .checkForBank08
-.bank02
- ld a, b
- call Func_9876
- jr .asm_240b
-.checkForBank08
- cp $8
- jr nz, .bank1F
-.bank08
- ld a, b
- call Func_22035
- jr .asm_240b
-.bank1F
- ld a, b
- call Func_7d8ea
-.asm_240b
- ld a, [$ffb9]
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
- jr .asm_2425
-.asm_2414
- ld a, b
- ld [wcfca], a
- ld a, [wMusicHeaderPointer]
- ld [wcfc8], a
- ld [wcfc9], a
- ld a, b
- ld [wMusicHeaderPointer], a
-.asm_2425
- pop bc
- pop de
- pop hl
- ret
UpdateSprites:: ; 2429 (0:2429)
ld a, [wcfcb]
@@ -5747,597 +1513,9 @@ Predef5CText:: ; 24f4 (0:24f4)
call Predef
jp TextScriptEnd
-; bankswitches and runs _UncompressSpriteData
-; bank is given in a, sprite input stream is pointed to in W_SPRITEINPUTPTR
-UncompressSpriteData:: ; 24fd (0:24fd)
- ld b, a
- ld a, [H_LOADEDROMBANK]
- push af
- ld a, b
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
- ld a, $a
- ld [$0], a
- xor a
- ld [$4000], a
- call _UncompressSpriteData
- pop af
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
- ret
-
-; initializes necessary data to load a sprite and runs UncompressSpriteDataLoop
-_UncompressSpriteData:: ; 251a (0:251a)
- ld hl, S_SPRITEBUFFER1
- ld c, (2*SPRITEBUFFERSIZE) % $100
- ld b, (2*SPRITEBUFFERSIZE) / $100
- xor a
- call FillMemory ; clear sprite buffer 1 and 2
- ld a, $1
- ld [W_SPRITEINPUTBITCOUNTER], a
- ld a, $3
- ld [W_SPRITEOUTPUTBITOFFSET], a
- xor a
- ld [W_SPRITECURPOSX], a
- ld [W_SPRITECURPOSY], a
- ld [W_SPRITELOADFLAGS], a ; wd0a8
- call ReadNextInputByte ; first byte of input determines sprite width (high nybble) and height (low nybble) in tiles (8x8 pixels)
- ld b, a
- and $f
- add a
- add a
- add a
- ld [W_SPRITEHEIGHT], a
- ld a, b
- swap a
- and $f
- add a
- add a
- add a
- ld [W_SPRITEWITDH], a
- call ReadNextInputBit
- ld [W_SPRITELOADFLAGS], a ; initialite bit1 to 0 and bit0 to the first input bit
- ; this will load two chunks of data to S_SPRITEBUFFER1 and S_SPRITEBUFFER2
- ; bit 0 decides in which one the first chunk is placed
- ; fall through
-
-; uncompresses a chunk from the sprite input data stream (pointed to at wd0da) into S_SPRITEBUFFER1 or S_SPRITEBUFFER2
-; each chunk is a 1bpp sprite. A 2bpp sprite consist of two chunks which are merged afterwards
-; note that this is an endless loop which is terminated during a call to MoveToNextBufferPosition by manipulating the stack
-UncompressSpriteDataLoop:: ; 2556 (0:2556)
- ld hl, S_SPRITEBUFFER1
- ld a, [W_SPRITELOADFLAGS] ; wd0a8
- bit 0, a
- jr z, .useSpriteBuffer1 ; check which buffer to use
- ld hl, S_SPRITEBUFFER2
-.useSpriteBuffer1
- call StoreSpriteOutputPointer
- ld a, [W_SPRITELOADFLAGS] ; wd0a8
- bit 1, a
- jr z, .startDecompression ; check if last iteration
- call ReadNextInputBit ; if last chunk, read 1-2 bit unpacking mode
- and a
- jr z, .unpackingMode0 ; 0 -> mode 0
- call ReadNextInputBit ; 1 0 -> mode 1
- inc a ; 1 1 -> mode 2
-.unpackingMode0
- ld [W_SPRITEUNPACKMODE], a
-.startDecompression
- call ReadNextInputBit
- and a
- jr z, .readRLEncodedZeros ; if first bit is 0, the input starts with zeroes, otherwise with (non-zero) input
-.readNextInput
- call ReadNextInputBit
- ld c, a
- call ReadNextInputBit
- sla c
- or c ; read next two bits into c
- and a
- jr z, .readRLEncodedZeros ; 00 -> RLEncoded zeroes following
- call WriteSpriteBitsToBuffer ; otherwise write input to output and repeat
- call MoveToNextBufferPosition
- jr .readNextInput
-.readRLEncodedZeros
- ld c, $0 ; number of zeroes it length encoded, the number
-.countConsecutiveOnesLoop ; of consecutive ones determines the number of bits the number has
- call ReadNextInputBit
- and a
- jr z, .countConsecutiveOnesFinished
- inc c
- jr .countConsecutiveOnesLoop
-.countConsecutiveOnesFinished
- ld a, c
- add a
- ld hl, LengthEncodingOffsetList
- add l
- ld l, a
- jr nc, .noCarry
- inc h
-.noCarry
- ld a, [hli] ; read offset that is added to the number later on
- ld e, a ; adding an offset of 2^length - 1 makes every integer uniquely
- ld d, [hl] ; representable in the length encoding and saves bits
- push de
- inc c
- ld e, $0
- ld d, e
-.readNumberOfZerosLoop ; reads the next c+1 bits of input
- call ReadNextInputBit
- or e
- ld e, a
- dec c
- jr z, .readNumberOfZerosDone
- sla e
- rl d
- jr .readNumberOfZerosLoop
-.readNumberOfZerosDone
- pop hl ; add the offset
- add hl, de
- ld e, l
- ld d, h
-.writeZerosLoop
- ld b, e
- xor a ; write 00 to buffer
- call WriteSpriteBitsToBuffer
- ld e, b
- call MoveToNextBufferPosition
- dec de
- ld a, d
- and a
- jr nz, .continueLoop
- ld a, e
- and a
-.continueLoop
- jr nz, .writeZerosLoop
- jr .readNextInput
-
-; moves output pointer to next position
-; also cancels the calling function if the all output is done (by removing the return pointer from stack)
-; and calls postprocessing functions according to the unpack mode
-MoveToNextBufferPosition:: ; 25d8 (0:25d8)
- ld a, [W_SPRITEHEIGHT]
- ld b, a
- ld a, [W_SPRITECURPOSY]
- inc a
- cp b
- jr z, .curColumnDone
- ld [W_SPRITECURPOSY], a
- ld a, [W_SPRITEOUTPUTPTR]
- inc a
- ld [W_SPRITEOUTPUTPTR], a
- ret nz
- ld a, [W_SPRITEOUTPUTPTR+1]
- inc a
- ld [W_SPRITEOUTPUTPTR+1], a
- ret
-.curColumnDone
- xor a
- ld [W_SPRITECURPOSY], a
- ld a, [W_SPRITEOUTPUTBITOFFSET]
- and a
- jr z, .bitOffsetsDone
- dec a
- ld [W_SPRITEOUTPUTBITOFFSET], a
- ld hl, W_SPRITEOUTPUTPTRCACHED
- ld a, [hli]
- ld [W_SPRITEOUTPUTPTR], a
- ld a, [hl]
- ld [W_SPRITEOUTPUTPTR+1], a
- ret
-.bitOffsetsDone
- ld a, $3
- ld [W_SPRITEOUTPUTBITOFFSET], a
- ld a, [W_SPRITECURPOSX]
- add $8
- ld [W_SPRITECURPOSX], a
- ld b, a
- ld a, [W_SPRITEWITDH]
- cp b
- jr z, .allColumnsDone
- ld a, [W_SPRITEOUTPUTPTR]
- ld l, a
- ld a, [W_SPRITEOUTPUTPTR+1]
- ld h, a
- inc hl
- jp StoreSpriteOutputPointer
-.allColumnsDone
- pop hl
- xor a
- ld [W_SPRITECURPOSX], a
- ld a, [W_SPRITELOADFLAGS] ; wd0a8
- bit 1, a
- jr nz, .done ; test if there is one more sprite to go
- xor $1
- set 1, a
- ld [W_SPRITELOADFLAGS], a ; wd0a8
- jp UncompressSpriteDataLoop
-.done
- jp UnpackSprite
-
-; writes 2 bits (from a) to the output buffer (pointed to from W_SPRITEOUTPUTPTR)
-WriteSpriteBitsToBuffer:: ; 2649 (0:2649)
- ld e, a
- ld a, [W_SPRITEOUTPUTBITOFFSET]
- and a
- jr z, .offset0
- cp $2
- jr c, .offset1
- jr z, .offset2
- rrc e ; offset 3
- rrc e
- jr .offset0
-.offset1
- sla e
- sla e
- jr .offset0
-.offset2
- swap e
-.offset0
- ld a, [W_SPRITEOUTPUTPTR]
- ld l, a
- ld a, [W_SPRITEOUTPUTPTR+1]
- ld h, a
- ld a, [hl]
- or e
- ld [hl], a
- ret
-
-; reads next bit from input stream and returns it in a
-ReadNextInputBit:: ; 2670 (0:2670)
- ld a, [W_SPRITEINPUTBITCOUNTER]
- dec a
- jr nz, .curByteHasMoreBitsToRead
- call ReadNextInputByte
- ld [W_SPRITEINPUTCURBYTE], a
- ld a, $8
-.curByteHasMoreBitsToRead
- ld [W_SPRITEINPUTBITCOUNTER], a
- ld a, [W_SPRITEINPUTCURBYTE]
- rlca
- ld [W_SPRITEINPUTCURBYTE], a
- and $1
- ret
-; reads next byte from input stream and returns it in a
-ReadNextInputByte:: ; 268b (0:268b)
- ld a, [W_SPRITEINPUTPTR]
- ld l, a
- ld a, [W_SPRITEINPUTPTR+1]
- ld h, a
- ld a, [hli]
- ld b, a
- ld a, l
- ld [W_SPRITEINPUTPTR], a
- ld a, h
- ld [W_SPRITEINPUTPTR+1], a
- ld a, b
- ret
+INCLUDE "home/pic.asm"
-; the nth item is 2^n - 1
-LengthEncodingOffsetList:: ; 269f (0:269f)
- dw %0000000000000001
- dw %0000000000000011
- dw %0000000000000111
- dw %0000000000001111
- dw %0000000000011111
- dw %0000000000111111
- dw %0000000001111111
- dw %0000000011111111
- dw %0000000111111111
- dw %0000001111111111
- dw %0000011111111111
- dw %0000111111111111
- dw %0001111111111111
- dw %0011111111111111
- dw %0111111111111111
- dw %1111111111111111
-
-; unpacks the sprite data depending on the unpack mode
-UnpackSprite:: ; 26bf (0:26bf)
- ld a, [W_SPRITEUNPACKMODE]
- cp $2
- jp z, UnpackSpriteMode2
- and a
- jp nz, XorSpriteChunks
- ld hl, S_SPRITEBUFFER1
- call SpriteDifferentialDecode
- ld hl, S_SPRITEBUFFER2
- ; fall through
-
-; decodes differential encoded sprite data
-; input bit value 0 preserves the current bit value and input bit value 1 toggles it (starting from initial value 0).
-SpriteDifferentialDecode:: ; 26d4 (0:26d4)
- xor a
- ld [W_SPRITECURPOSX], a
- ld [W_SPRITECURPOSY], a
- call StoreSpriteOutputPointer
- ld a, [W_SPRITEFLIPPED]
- and a
- jr z, .notFlipped
- ld hl, DecodeNybble0TableFlipped
- ld de, DecodeNybble1TableFlipped
- jr .storeDecodeTablesPointers
-.notFlipped
- ld hl, DecodeNybble0Table
- ld de, DecodeNybble1Table
-.storeDecodeTablesPointers
- ld a, l
- ld [W_SPRITEDECODETABLE0PTR], a
- ld a, h
- ld [W_SPRITEDECODETABLE0PTR+1], a
- ld a, e
- ld [W_SPRITEDECODETABLE1PTR], a
- ld a, d
- ld [W_SPRITEDECODETABLE1PTR+1], a
- ld e, $0 ; last decoded nybble, initialized to 0
-.decodeNextByteLoop
- ld a, [W_SPRITEOUTPUTPTR]
- ld l, a
- ld a, [W_SPRITEOUTPUTPTR+1]
- ld h, a
- ld a, [hl]
- ld b, a
- swap a
- and $f
- call DifferentialDecodeNybble ; decode high nybble
- swap a
- ld d, a
- ld a, b
- and $f
- call DifferentialDecodeNybble ; decode low nybble
- or d
- ld b, a
- ld a, [W_SPRITEOUTPUTPTR]
- ld l, a
- ld a, [W_SPRITEOUTPUTPTR+1]
- ld h, a
- ld a, b
- ld [hl], a ; write back decoded data
- ld a, [W_SPRITEHEIGHT]
- add l ; move on to next column
- jr nc, .noCarry
- inc h
-.noCarry
- ld [W_SPRITEOUTPUTPTR], a
- ld a, h
- ld [W_SPRITEOUTPUTPTR+1], a
- ld a, [W_SPRITECURPOSX]
- add $8
- ld [W_SPRITECURPOSX], a
- ld b, a
- ld a, [W_SPRITEWITDH]
- cp b
- jr nz, .decodeNextByteLoop ; test if current row is done
- xor a
- ld e, a
- ld [W_SPRITECURPOSX], a
- ld a, [W_SPRITECURPOSY] ; move on to next row
- inc a
- ld [W_SPRITECURPOSY], a
- ld b, a
- ld a, [W_SPRITEHEIGHT]
- cp b
- jr z, .done ; test if all rows finished
- ld a, [W_SPRITEOUTPUTPTRCACHED]
- ld l, a
- ld a, [W_SPRITEOUTPUTPTRCACHED+1]
- ld h, a
- inc hl
- call StoreSpriteOutputPointer
- jr .decodeNextByteLoop
-.done
- xor a
- ld [W_SPRITECURPOSY], a
- ret
-
-; decodes the nybble stored in a. Last decoded data is assumed to be in e (needed to determine if initial value is 0 or 1)
-DifferentialDecodeNybble:: ; 276d (0:276d)
- srl a ; c=a%2, a/=2
- ld c, $0
- jr nc, .evenNumber
- ld c, $1
-.evenNumber
- ld l, a
- ld a, [W_SPRITEFLIPPED]
- and a
- jr z, .notFlipped ; determine if initial value is 0 or one
- bit 3, e ; if flipped, consider MSB of last data
- jr .selectLookupTable
-.notFlipped
- bit 0, e ; else consider LSB
-.selectLookupTable
- ld e, l
- jr nz, .initialValue1 ; load the appropriate table
- ld a, [W_SPRITEDECODETABLE0PTR]
- ld l, a
- ld a, [W_SPRITEDECODETABLE0PTR+1]
- jr .tableLookup
-.initialValue1
- ld a, [W_SPRITEDECODETABLE1PTR]
- ld l, a
- ld a, [W_SPRITEDECODETABLE1PTR+1]
-.tableLookup
- ld h, a
- ld a, e
- add l
- ld l, a
- jr nc, .noCarry
- inc h
-.noCarry
- ld a, [hl]
- bit 0, c
- jr nz, .selectLowNybble
- swap a ; select high nybble
-.selectLowNybble
- and $f
- ld e, a ; update last decoded data
- ret
-
-DecodeNybble0Table:: ; 27a7 (0:27a7)
- dn $0, $1
- dn $3, $2
- dn $7, $6
- dn $4, $5
- dn $f, $e
- dn $c, $d
- dn $8, $9
- dn $b, $a
-DecodeNybble1Table:: ; 27af (0:27af)
- dn $f, $e
- dn $c, $d
- dn $8, $9
- dn $b, $a
- dn $0, $1
- dn $3, $2
- dn $7, $6
- dn $4, $5
-DecodeNybble0TableFlipped:: ; 27b7 (0:27b7)
- dn $0, $8
- dn $c, $4
- dn $e, $6
- dn $2, $a
- dn $f, $7
- dn $3, $b
- dn $1, $9
- dn $d, $5
-DecodeNybble1TableFlipped:: ; 27bf (0:27bf)
- dn $f, $7
- dn $3, $b
- dn $1, $9
- dn $d, $5
- dn $0, $8
- dn $c, $4
- dn $e, $6
- dn $2, $a
-
-; combines the two loaded chunks with xor (the chunk loaded second is the destination). The source chunk is differeintial decoded beforehand.
-XorSpriteChunks:: ; 27c7 (0:27c7)
- xor a
- ld [W_SPRITECURPOSX], a
- ld [W_SPRITECURPOSY], a
- call ResetSpriteBufferPointers
- ld a, [W_SPRITEOUTPUTPTR] ; points to buffer 1 or 2, depending on flags
- ld l, a
- ld a, [W_SPRITEOUTPUTPTR+1]
- ld h, a
- call SpriteDifferentialDecode ; decode buffer 1 or 2, depending on flags
- call ResetSpriteBufferPointers
- ld a, [W_SPRITEOUTPUTPTR] ; source buffer, points to buffer 1 or 2, depending on flags
- ld l, a
- ld a, [W_SPRITEOUTPUTPTR+1]
- ld h, a
- ld a, [W_SPRITEOUTPUTPTRCACHED] ; destination buffer, points to buffer 2 or 1, depending on flags
- ld e, a
- ld a, [W_SPRITEOUTPUTPTRCACHED+1]
- ld d, a
-.xorChunksLoop
- ld a, [W_SPRITEFLIPPED]
- and a
- jr z, .notFlipped
- push de
- ld a, [de]
- ld b, a
- swap a
- and $f
- call ReverseNybble ; if flipped reverse the nybbles in the destination buffer
- swap a
- ld c, a
- ld a, b
- and $f
- call ReverseNybble
- or c
- pop de
- ld [de], a
-.notFlipped
- ld a, [hli]
- ld b, a
- ld a, [de]
- xor b
- ld [de], a
- inc de
- ld a, [W_SPRITECURPOSY]
- inc a
- ld [W_SPRITECURPOSY], a ; go to next row
- ld b, a
- ld a, [W_SPRITEHEIGHT]
- cp b
- jr nz, .xorChunksLoop ; test if column finished
- xor a
- ld [W_SPRITECURPOSY], a
- ld a, [W_SPRITECURPOSX]
- add $8
- ld [W_SPRITECURPOSX], a ; go to next column
- ld b, a
- ld a, [W_SPRITEWITDH]
- cp b
- jr nz, .xorChunksLoop ; test if all columns finished
- xor a
- ld [W_SPRITECURPOSX], a
- ret
-
-; reverses the bits in the nybble given in register a
-ReverseNybble:: ; 2837 (0:2837)
- ld de, NybbleReverseTable
- add e
- ld e, a
- jr nc, .asm_283f
- inc d
-.asm_283f
- ld a, [de]
- ret
-
-; resets sprite buffer pointers to buffer 1 and 2, depending on W_SPRITELOADFLAGS
-ResetSpriteBufferPointers:: ; 2841 (0:2841)
- ld a, [W_SPRITELOADFLAGS] ; wd0a8
- bit 0, a
- jr nz, .buffer2Selected
- ld de, S_SPRITEBUFFER1
- ld hl, S_SPRITEBUFFER2
- jr .storeBufferPointers
-.buffer2Selected
- ld de, S_SPRITEBUFFER2
- ld hl, S_SPRITEBUFFER1
-.storeBufferPointers
- ld a, l
- ld [W_SPRITEOUTPUTPTR], a
- ld a, h
- ld [W_SPRITEOUTPUTPTR+1], a
- ld a, e
- ld [W_SPRITEOUTPUTPTRCACHED], a
- ld a, d
- ld [W_SPRITEOUTPUTPTRCACHED+1], a
- ret
-
-; maps each nybble to its reverse
-NybbleReverseTable:: ; 2867 (0:2867)
- db $0, $8, $4, $c, $2, $a, $6 ,$e, $1, $9, $5, $d, $3, $b, $7 ,$f
-
-; combines the two loaded chunks with xor (the chunk loaded second is the destination). Both chunks are differeintial decoded beforehand.
-UnpackSpriteMode2:: ; 2877 (0:2877)
- call ResetSpriteBufferPointers
- ld a, [W_SPRITEFLIPPED]
- push af
- xor a
- ld [W_SPRITEFLIPPED], a ; temporarily clear flipped flag for decoding the destination chunk
- ld a, [W_SPRITEOUTPUTPTRCACHED]
- ld l, a
- ld a, [W_SPRITEOUTPUTPTRCACHED+1]
- ld h, a
- call SpriteDifferentialDecode
- call ResetSpriteBufferPointers
- pop af
- ld [W_SPRITEFLIPPED], a
- jp XorSpriteChunks
-
-; stores hl into the output pointers
-StoreSpriteOutputPointer:: ; 2897 (0:2897)
- ld a, l
- ld [W_SPRITEOUTPUTPTR], a
- ld [W_SPRITEOUTPUTPTRCACHED], a
- ld a, h
- ld [W_SPRITEOUTPUTPTR+1], a
- ld [W_SPRITEOUTPUTPTRCACHED+1], a
- ret
ResetPlayerSpriteData:: ; 28a6 (0:28a6)
ld hl, wSpriteStateData1
@@ -9982,56 +5160,7 @@ Random::
ret
-Predef::
-; Call predefined function a.
-; To preserve other registers, have the
-; destination call GetPredefRegisters.
-
- ; Save the predef id for GetPredefPointer.
- ld [wPredefID], a
-
- ; A hack for LoadDestinationWarpPosition.
- ; See Func_c754 (predef $19).
- ld a, [H_LOADEDROMBANK]
- ld [wPredefParentBank], a
-
- push af
- ld a, BANK(GetPredefPointer)
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
-
- call GetPredefPointer
-
- ld a, [wPredefBank]
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
-
- ld de, .done
- push de
- jp [hl]
-.done
-
- pop af
- ld [H_LOADEDROMBANK], a
- ld [$2000], a
- ret
-
-GetPredefRegisters::
-; Restore the contents of register pairs
-; when GetPredefPointer was called.
- ld a, [wPredefRegisters + 0]
- ld h, a
- ld a, [wPredefRegisters + 1]
- ld l, a
- ld a, [wPredefRegisters + 2]
- ld d, a
- ld a, [wPredefRegisters + 3]
- ld e, a
- ld a, [wPredefRegisters + 4]
- ld b, a
- ld a, [wPredefRegisters + 5]
- ld c, a
- ret
+INCLUDE "home/predef.asm"
Func_3ead:: ; 3ead (0:3ead)
diff --git a/home/audio.asm b/home/audio.asm
new file mode 100644
index 00000000..724b8c5f
--- /dev/null
+++ b/home/audio.asm
@@ -0,0 +1,183 @@
+Func_2307:: ; 2307 (0:2307)
+ call WaitForSoundToFinish
+ xor a
+ ld c, a
+ ld d, a
+ ld [wcfca], a
+ jr asm_2324
+
+Func_2312:: ; 2312 (0:2312)
+ ld c, $a
+ ld d, $0
+ ld a, [wd72e]
+ bit 5, a
+ jr z, asm_2324
+ xor a
+ ld [wcfca], a
+ ld c, $8
+ ld d, c
+asm_2324:: ; 2324 (0:2324)
+ ld a, [wd700]
+ and a
+ jr z, .asm_2343
+ cp $2
+ jr z, .asm_2332
+ ld a, MUSIC_BIKE_RIDING
+ jr .asm_2334
+.asm_2332
+ ld a, MUSIC_SURFING
+.asm_2334
+ ld b, a
+ ld a, d
+ and a
+ ld a, Bank(Func_7d8ea)
+ jr nz, .asm_233e
+ ld [wc0ef], a
+.asm_233e
+ ld [wc0f0], a
+ jr .asm_234c
+.asm_2343
+ ld a, [wd35b]
+ ld b, a
+ call Func_2385
+ jr c, .asm_2351
+.asm_234c
+ ld a, [wcfca]
+ cp b
+ ret z
+.asm_2351
+ ld a, c
+ ld [wMusicHeaderPointer], a
+ ld a, b
+ ld [wcfca], a
+ ld [wc0ee], a
+ jp PlaySound
+
+Func_235f:: ; 235f (0:235f)
+ ld a, [wc0ef]
+ ld b, a
+ cp $2
+ jr nz, .checkForBank08
+.bank02
+ ld hl, Func_9103
+ jr .asm_2378
+.checkForBank08
+ cp $8
+ jr nz, .bank1F
+.bank08
+ ld hl, Func_21879
+ jr .asm_2378
+.bank1F
+ ld hl, Func_7d177
+.asm_2378
+ ld c, $6
+.asm_237a
+ push bc
+ push hl
+ call Bankswitch
+ pop hl
+ pop bc
+ dec c
+ jr nz, .asm_237a
+ ret
+
+Func_2385:: ; 2385 (0:2385)
+ ld a, [wd35c]
+ ld e, a
+ ld a, [wc0ef]
+ cp e
+ jr nz, .asm_2394
+ ld [wc0f0], a
+ and a
+ ret
+.asm_2394
+ ld a, c
+ and a
+ ld a, e
+ jr nz, .asm_239c
+ ld [wc0ef], a
+.asm_239c
+ ld [wc0f0], a
+ scf
+ ret
+
+PlayMusic:: ; 23a1 (0:23a1)
+ ld b, a
+ ld [wc0ee], a
+ xor a
+ ld [wMusicHeaderPointer], a
+ ld a, c
+ ld [wc0ef], a
+ ld [wc0f0], a
+ ld a, b
+
+; plays music specified by a. If value is $ff, music is stopped
+PlaySound:: ; 23b1 (0:23b1)
+ push hl
+ push de
+ push bc
+ ld b, a
+ ld a, [wc0ee]
+ and a
+ jr z, .asm_23c8
+ xor a
+ ld [wc02a], a
+ ld [wc02b], a
+ ld [wc02c], a
+ ld [wc02d], a
+.asm_23c8
+ ld a, [wMusicHeaderPointer]
+ and a
+ jr z, .asm_23e3
+ ld a, [wc0ee]
+ and a
+ jr z, .asm_2425
+ xor a
+ ld [wc0ee], a
+ ld a, [wcfca]
+ cp $ff
+ jr nz, .asm_2414
+ xor a
+ ld [wMusicHeaderPointer], a
+.asm_23e3
+ xor a
+ ld [wc0ee], a
+ ld a, [H_LOADEDROMBANK]
+ ld [$ffb9], a
+ ld a, [wc0ef]
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+ cp $2
+ jr nz, .checkForBank08
+.bank02
+ ld a, b
+ call Func_9876
+ jr .asm_240b
+.checkForBank08
+ cp $8
+ jr nz, .bank1F
+.bank08
+ ld a, b
+ call Func_22035
+ jr .asm_240b
+.bank1F
+ ld a, b
+ call Func_7d8ea
+.asm_240b
+ ld a, [$ffb9]
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+ jr .asm_2425
+.asm_2414
+ ld a, b
+ ld [wcfca], a
+ ld a, [wMusicHeaderPointer]
+ ld [wcfc8], a
+ ld [wcfc9], a
+ ld a, b
+ ld [wMusicHeaderPointer], a
+.asm_2425
+ pop bc
+ pop de
+ pop hl
+ ret
diff --git a/home/fade.asm b/home/fade.asm
new file mode 100644
index 00000000..9b55eaf2
--- /dev/null
+++ b/home/fade.asm
@@ -0,0 +1,73 @@
+; These routines manage gradual fading
+; (e.g., entering a doorway)
+LoadGBPal::
+ ld a, [wd35d] ;tells if cur.map is dark (requires HM5_FLASH?)
+ ld b, a
+ ld hl, FadePal4
+ ld a, l
+ sub b
+ ld l, a
+ jr nc, .ok
+ dec h
+.ok
+ ld a, [hli]
+ ld [rBGP], a
+ ld a, [hli]
+ ld [rOBP0], a
+ ld a, [hli]
+ ld [rOBP1], a
+ ret
+
+GBFadeOut1::
+ ld hl, FadePal1
+ ld b, 4
+ jr GBFadeOutCommon
+
+GBFadeOut2::
+ ld hl, FadePal6
+ ld b, 3
+
+GBFadeOutCommon::
+ ld a, [hli]
+ ld [rBGP], a
+ ld a, [hli]
+ ld [rOBP0], a
+ ld a, [hli]
+ ld [rOBP1], a
+ ld c, 8
+ call DelayFrames
+ dec b
+ jr nz, GBFadeOutCommon
+ ret
+
+GBFadeIn1::
+ ld hl, FadePal4 + 2
+ ld b, 4
+ jr GBFadeInCommon
+
+GBFadeIn2::
+ ld hl, FadePal7 + 2
+ ld b, 3
+
+GBFadeInCommon::
+ ld a, [hld]
+ ld [rOBP1], a
+ ld a, [hld]
+ ld [rOBP0], a
+ ld a, [hld]
+ ld [rBGP], a
+ ld c, 8
+ call DelayFrames
+ dec b
+ jr nz, GBFadeInCommon
+ ret
+
+FadePal1:: db %11111111, %11111111, %11111111
+FadePal2:: db %11111110, %11111110, %11111000
+FadePal3:: db %11111001, %11100100, %11100100
+FadePal4:: db %11100100, %11010000, %11100000
+; rBGP rOBP0 rOBP1
+FadePal5:: db %11100100, %11010000, %11100000
+FadePal6:: db %10010000, %10000000, %10010000
+FadePal7:: db %01000000, %01000000, %01000000
+FadePal8:: db %00000000, %00000000, %00000000
diff --git a/home/init.asm b/home/init.asm
new file mode 100644
index 00000000..939e81b5
--- /dev/null
+++ b/home/init.asm
@@ -0,0 +1,139 @@
+SoftReset::
+ call StopAllSounds
+ call GBPalWhiteOut
+ ld c, $20
+ call DelayFrames
+ ; fallthrough
+
+Init::
+; Program init.
+
+rLCDC_DEFAULT EQU %11100011
+; * LCD enabled
+; * Window tile map at $9C00
+; * Window display enabled
+; * BG and window tile data at $8800
+; * BG tile map at $9800
+; * 8x8 OBJ size
+; * OBJ display enabled
+; * BG display enabled
+
+ di
+
+ xor a
+ ld [rIF], a
+ ld [rIE], a
+ ld [$ff43], a
+ ld [$ff42], a
+ ld [$ff01], a
+ ld [$ff02], a
+ ld [$ff4b], a
+ ld [$ff4a], a
+ ld [$ff06], a
+ ld [$ff07], a
+ ld [$ff47], a
+ ld [$ff48], a
+ ld [$ff49], a
+
+ ld a, rLCDC_ENABLE_MASK
+ ld [rLCDC], a
+ call DisableLCD
+
+ ld sp, wStack
+
+ ld hl, $c000 ; start of WRAM
+ ld bc, $2000 ; size of WRAM
+.loop
+ ld [hl], 0
+ inc hl
+ dec bc
+ ld a, b
+ or c
+ jr nz, .loop
+
+ call ClearVram
+
+ ld hl, $ff80
+ ld bc, $ffff - $ff80
+ call FillMemory
+
+ call ClearSprites
+
+ ld a, Bank(WriteDMACodeToHRAM)
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
+ call WriteDMACodeToHRAM
+
+ xor a
+ ld [$ffd7], a
+ ld [$ff41], a
+ ld [$ffae], a
+ ld [$ffaf], a
+ ld [$ff0f], a
+ ld a, 1 << VBLANK + 1 << TIMER + 1 << SERIAL
+ ld [rIE], a
+
+ ld a, 144 ; move the window off-screen
+ ld [$ffb0], a
+ ld [rWY], a
+ ld a, 7
+ ld [rWX], a
+
+ ld a, $ff
+ ld [$ffaa], a
+
+ ld h, vBGMap0 / $100
+ call ClearBgMap
+ ld h, vBGMap1 / $100
+ call ClearBgMap
+
+ ld a, rLCDC_DEFAULT
+ ld [rLCDC], a
+ ld a, 16
+ ld [hSoftReset], a
+ call StopAllSounds
+
+ ei
+
+ ld a, $40 ; PREDEF_SGB_BORDER
+ call Predef
+
+ ld a, $1f
+ ld [wc0ef], a
+ ld [wc0f0], a
+ ld a, $9c
+ ld [$ffbd], a
+ xor a
+ ld [$ffbc], a
+ dec a
+ ld [wcfcb], a
+
+ ld a, $32 ; PREDEF_INTRO
+ call Predef
+
+ call DisableLCD
+ call ClearVram
+ call GBPalNormal
+ call ClearSprites
+ ld a, rLCDC_DEFAULT
+ ld [rLCDC], a
+
+ jp SetDefaultNamesBeforeTitlescreen
+
+ClearVram:
+ ld hl, $8000
+ ld bc, $2000
+ xor a
+ jp FillMemory
+
+
+StopAllSounds::
+ ld a, Bank(Func_9876)
+ ld [wc0ef], a
+ ld [wc0f0], a
+ xor a
+ ld [wMusicHeaderPointer], a
+ ld [wc0ee], a
+ ld [wcfca], a
+ dec a
+ jp PlaySound
diff --git a/home/joypad.asm b/home/joypad.asm
new file mode 100644
index 00000000..2002bb29
--- /dev/null
+++ b/home/joypad.asm
@@ -0,0 +1,39 @@
+ReadJoypad::
+; Poll joypad input.
+; Unlike the hardware register, button
+; presses are indicated by a set bit.
+
+ ld a, 1 << 5 ; select direction keys
+ ld c, 0
+
+ ld [rJOYP], a
+ rept 6
+ ld a, [rJOYP]
+ endr
+ cpl
+ and %1111
+ swap a
+ ld b, a
+
+ ld a, 1 << 4 ; select button keys
+ ld [rJOYP], a
+ rept 10
+ ld a, [rJOYP]
+ endr
+ cpl
+ and %1111
+ or b
+
+ ld [hJoyInput], a
+
+ ld a, 1 << 4 + 1 << 5 ; deselect keys
+ ld [rJOYP], a
+ ret
+
+Joypad::
+; Update the joypad state variables:
+; [hJoyReleased] keys released since last time
+; [hJoyPressed] keys pressed since last time
+; [hJoyHeld] currently pressed keys
+ homecall _Joypad
+ ret
diff --git a/home/overworld.asm b/home/overworld.asm
new file mode 100644
index 00000000..84c96f3e
--- /dev/null
+++ b/home/overworld.asm
@@ -0,0 +1,2419 @@
+HandleMidJump::
+; Handle the player jumping down
+; a ledge in the overworld.
+ ld b, BANK(_HandleMidJump)
+ ld hl, _HandleMidJump
+ jp Bankswitch
+
+EnterMap::
+; Load a new map.
+ ld a, $ff
+ ld [wJoyIgnore], a
+ call LoadMapData
+ callba Func_c335 ; initialize map variables
+ ld hl, wd72c
+ bit 0, [hl]
+ jr z, .doNotCountSteps
+ ld a, 3
+ ld [wd13c], a ; some kind of step counter (counts up to 3 steps?)
+.doNotCountSteps
+ ld hl, wd72e
+ bit 5, [hl] ; did a battle happen immediately before this?
+ res 5, [hl] ; unset the "battle just happened" flag
+ call z, Func_12e7
+ call nz, MapEntryAfterBattle
+ ld hl, wd732
+ ld a, [hl]
+ and 1 << 4 | 1 << 3
+ jr z, .didNotFlyOrTeleportIn
+ res 3, [hl]
+ callba Func_70510 ; display fly/teleport in graphical effect
+ call UpdateSprites
+.didNotFlyOrTeleportIn
+ callba CheckForceBikeOrSurf ; handle currents in SF islands and forced bike riding in cycling road
+ ld hl, wd72d
+ res 5, [hl]
+ call UpdateSprites
+ ld hl, wd126
+ set 5, [hl]
+ set 6, [hl]
+ xor a
+ ld [wJoyIgnore], a
+
+OverworldLoop::
+ call DelayFrame
+OverworldLoopLessDelay::
+ call DelayFrame
+ call LoadGBPal
+ ld a,[wd736]
+ bit 6,a ; jumping down a ledge?
+ call nz, HandleMidJump
+ ld a,[wWalkCounter]
+ and a
+ jp nz,.moveAhead ; if the player sprite has not yet completed the walking animation
+ call JoypadOverworld ; get joypad state (which is possibly simulated)
+ callba SafariZoneCheck
+ ld a,[wda46]
+ and a
+ jp nz,WarpFound2
+ ld hl,wd72d
+ bit 3,[hl]
+ res 3,[hl]
+ jp nz,WarpFound2
+ ld a,[wd732]
+ and a,$18
+ jp nz,HandleFlyOrTeleportAway
+ ld a,[W_CUROPPONENT]
+ and a
+ jp nz,.newBattle
+ ld a,[wd730]
+ bit 7,a ; are we simulating button presses?
+ jr z,.notSimulating
+ ld a,[hJoyHeld]
+ jr .checkIfStartIsPressed
+.notSimulating
+ ld a,[hJoyPressed]
+.checkIfStartIsPressed
+ bit 3,a ; start button
+ jr z,.startButtonNotPressed
+; if START is pressed
+ xor a
+ ld [$ff8c],a ; the $2920 ID for the start menu is 0
+ jp .displayDialogue
+.startButtonNotPressed
+ bit 0,a ; A button
+ jp z,.checkIfDownButtonIsPressed
+; if A is pressed
+ ld a,[wd730]
+ bit 2,a
+ jp nz,.noDirectionButtonsPressed
+ call Func_30fd
+ jr nz,.checkForOpponent
+ call Func_3eb5 ; check for hidden items, PC's, etc.
+ ld a,[$ffeb]
+ and a
+ jp z,OverworldLoop
+ call IsSpriteOrSignInFrontOfPlayer ; check for sign or sprite in front of the player
+ ld a,[$ff8c] ; $2920 ID for NPC/sign text, if any
+ and a
+ jp z,OverworldLoop
+.displayDialogue
+ ld a,$35
+ call Predef ; check what is in front of the player
+ call UpdateSprites ; move sprites
+ ld a,[wFlags_0xcd60]
+ bit 2,a
+ jr nz,.checkForOpponent
+ bit 0,a
+ jr nz,.checkForOpponent
+ FuncCoord 8, 9
+ ld a,[Coord]
+ ld [wcf0e],a
+ call DisplayTextID ; display either the start menu or the NPC/sign text
+ ld a,[wcc47]
+ and a
+ jr z,.checkForOpponent
+ dec a
+ ld a,$00
+ ld [wcc47],a
+ jr z,.changeMap
+ ld a,$52
+ call Predef
+ ld a,[W_CURMAP]
+ ld [wd71a],a
+ call Func_62ce
+ ld a,[W_CURMAP]
+ call SwitchToMapRomBank ; switch to the ROM bank of the current map
+ ld hl,W_CURMAPTILESET
+ set 7,[hl]
+.changeMap
+ jp EnterMap
+.checkForOpponent
+ ld a,[W_CUROPPONENT]
+ and a
+ jp nz,.newBattle
+ jp OverworldLoop
+.noDirectionButtonsPressed
+ ld hl,wFlags_0xcd60
+ res 2,[hl]
+ call UpdateSprites ; move sprites
+ ld a,$01
+ ld [wcc4b],a
+ ld a,[wd528] ; the direction that was pressed last time
+ and a
+ jp z,OverworldLoop
+; if a direction was pressed last time
+ ld [wd529],a ; save the last direction
+ xor a
+ ld [wd528],a ; zero the direction
+ jp OverworldLoop
+.checkIfDownButtonIsPressed
+ ld a,[hJoyHeld] ; current joypad state
+ bit 7,a ; down button
+ jr z,.checkIfUpButtonIsPressed
+ ld a,$01
+ ld [wSpriteStateData1 + 3],a
+ ld a,$04
+ jr .handleDirectionButtonPress
+.checkIfUpButtonIsPressed
+ bit 6,a ; up button
+ jr z,.checkIfLeftButtonIsPressed
+ ld a,$ff
+ ld [wSpriteStateData1 + 3],a
+ ld a,$08
+ jr .handleDirectionButtonPress
+.checkIfLeftButtonIsPressed
+ bit 5,a ; left button
+ jr z,.checkIfRightButtonIsPressed
+ ld a,$ff
+ ld [wSpriteStateData1 + 5],a
+ ld a,$02
+ jr .handleDirectionButtonPress
+.checkIfRightButtonIsPressed
+ bit 4,a ; right button
+ jr z,.noDirectionButtonsPressed
+ ld a,$01
+ ld [wSpriteStateData1 + 5],a
+.handleDirectionButtonPress
+ ld [wd52a],a ; new direction
+ ld a,[wd730]
+ bit 7,a ; are we simulating button presses?
+ jr nz,.noDirectionChange ; ignore direction changes if we are
+ ld a,[wcc4b]
+ and a
+ jr z,.noDirectionChange
+ ld a,[wd52a] ; new direction
+ ld b,a
+ ld a,[wd529] ; old direction
+ cp b
+ jr z,.noDirectionChange
+; the code below is strange
+; it computes whether or not the player did a 180 degree turn, but then overwrites the result
+; also, it does a seemingly pointless loop afterwards
+ swap a ; put old direction in upper half
+ or b ; put new direction in lower half
+ cp a,$48 ; change dir from down to up
+ jr nz,.notDownToUp
+ ld a,$02
+ ld [wd528],a
+ jr .oddLoop
+.notDownToUp
+ cp a,$84 ; change dir from up to down
+ jr nz,.notUpToDown
+ ld a,$01
+ ld [wd528],a
+ jr .oddLoop
+.notUpToDown
+ cp a,$12 ; change dir from right to left
+ jr nz,.notRightToLeft
+ ld a,$04
+ ld [wd528],a
+ jr .oddLoop
+.notRightToLeft
+ cp a,$21 ; change dir from left to right
+ jr nz,.oddLoop
+ ld a,$08
+ ld [wd528],a
+.oddLoop
+ ld hl,wFlags_0xcd60
+ set 2,[hl]
+ ld hl,wcc4b
+ dec [hl]
+ jr nz,.oddLoop
+ ld a,[wd52a]
+ ld [wd528],a
+ call NewBattle
+ jp c,.battleOccurred
+ jp OverworldLoop
+.noDirectionChange
+ ld a,[wd52a] ; current direction
+ ld [wd528],a ; save direction
+ call UpdateSprites ; move sprites
+ ld a,[wd700]
+ cp a,$02 ; surfing
+ jr z,.surfing
+; not surfing
+ call CollisionCheckOnLand
+ jr nc,.noCollision
+ push hl
+ ld hl,wd736
+ bit 2,[hl]
+ pop hl
+ jp z,OverworldLoop
+ push hl
+ call ExtraWarpCheck ; sets carry if there is a potential to warp
+ pop hl
+ jp c,CheckWarpsCollision
+ jp OverworldLoop
+.surfing
+ call CollisionCheckOnWater
+ jp c,OverworldLoop
+.noCollision
+ ld a,$08
+ ld [wWalkCounter],a
+ jr .moveAhead2
+.moveAhead
+ ld a,[wd736]
+ bit 7,a
+ jr z,.noSpinning
+ callba LoadSpinnerArrowTiles ; spin while moving
+.noSpinning
+ call UpdateSprites ; move sprites
+.moveAhead2
+ ld hl,wFlags_0xcd60
+ res 2,[hl]
+ ld a,[wd700]
+ dec a ; riding a bike?
+ jr nz,.normalPlayerSpriteAdvancement
+ ld a,[wd736]
+ bit 6,a ; jumping a ledge?
+ jr nz,.normalPlayerSpriteAdvancement
+ call BikeSpeedup ; if riding a bike and not jumping a ledge
+.normalPlayerSpriteAdvancement
+ call AdvancePlayerSprite
+ ld a,[wWalkCounter]
+ and a
+ jp nz,CheckMapConnections ; it seems like this check will never succeed (the other place where CheckMapConnections is run works)
+; walking animation finished
+ ld a,[wd730]
+ bit 7,a
+ jr nz,.doneStepCounting ; if button presses are being simulated, don't count steps
+; step counting
+ ld hl,wd13b ; step counter
+ dec [hl]
+ ld a,[wd72c]
+ bit 0,a
+ jr z,.doneStepCounting
+ ld hl,wd13c
+ dec [hl]
+ jr nz,.doneStepCounting
+ ld hl,wd72c
+ res 0,[hl]
+.doneStepCounting
+ ld a,[wd790]
+ bit 7,a ; in the safari zone?
+ jr z,.notSafariZone
+ callba SafariZoneCheckSteps
+ ld a,[wda46]
+ and a
+ jp nz,WarpFound2
+.notSafariZone
+ ld a,[W_ISINBATTLE]
+ and a
+ jp nz,CheckWarpsNoCollision
+ ld a,$13
+ call Predef ; decrement HP of poisoned pokemon
+ ld a,[wd12d]
+ and a
+ jp nz,HandleBlackOut ; if all pokemon fainted
+.newBattle
+ call NewBattle
+ ld hl,wd736
+ res 2,[hl]
+ jp nc,CheckWarpsNoCollision ; check for warps if there was no battle
+.battleOccurred
+ ld hl,wd72d
+ res 6,[hl]
+ ld hl,W_FLAGS_D733
+ res 3,[hl]
+ ld hl,wd126
+ set 5,[hl]
+ set 6,[hl]
+ xor a
+ ld [hJoyHeld],a ; clear joypad state
+ ld a,[W_CURMAP]
+ cp a,CINNABAR_GYM
+ jr nz,.notCinnabarGym
+ ld hl,wd79b
+ set 7,[hl]
+.notCinnabarGym
+ ld hl,wd72e
+ set 5,[hl]
+ ld a,[W_CURMAP]
+ cp a,OAKS_LAB
+ jp z,.noFaintCheck
+ callab AnyPlayerPokemonAliveCheck ; check if all the player's pokemon fainted
+ ld a,d
+ and a
+ jr z,.allPokemonFainted
+.noFaintCheck
+ ld c,$0a
+ call DelayFrames
+ jp EnterMap
+.allPokemonFainted
+ ld a,$ff
+ ld [W_ISINBATTLE],a
+ call RunMapScript
+ jp HandleBlackOut
+
+; function to determine if there will be a battle and execute it (either a trainer battle or wild battle)
+; sets carry if a battle occurred and unsets carry if not
+NewBattle:: ; 0683 (0:0683)
+ ld a,[wd72d]
+ bit 4,a
+ jr nz,.noBattle
+ call Func_30fd
+ jr nz,.noBattle
+ ld a,[wd72e]
+ bit 4,a
+ jr nz,.noBattle
+ ld b, BANK(InitBattle)
+ ld hl, InitBattle
+ jp Bankswitch ; determines if a battle will occur and runs the battle if so
+.noBattle
+ and a
+ ret
+
+; function to make bikes twice as fast as walking
+BikeSpeedup:: ; 06a0 (0:06a0)
+ ld a,[wcc57]
+ and a
+ ret nz
+ ld a,[W_CURMAP]
+ cp a,ROUTE_17 ; Cycling Road
+ jr nz,.goFaster
+ ld a,[hJoyHeld] ; current joypad state
+ and a,%01110000 ; bit mask for up, left, right buttons
+ ret nz
+.goFaster
+ jp AdvancePlayerSprite
+
+; check if the player has stepped onto a warp after having not collided
+CheckWarpsNoCollision:: ; 06b4 (0:06b4)
+ ld a,[wd3ae] ; number of warps
+ and a
+ jp z,CheckMapConnections
+ ld a,[wd3ae] ; number of warps
+ ld b,$00
+ ld c,a
+ ld a,[W_YCOORD]
+ ld d,a
+ ld a,[W_XCOORD]
+ ld e,a
+ ld hl,wd3af ; start of warp entries
+CheckWarpsNoCollisionLoop:: ; 06cc (0:06cc)
+ ld a,[hli] ; check if the warp's Y position matches
+ cp d
+ jr nz,CheckWarpsNoCollisionRetry1
+ ld a,[hli] ; check if the warp's X position matches
+ cp e
+ jr nz,CheckWarpsNoCollisionRetry2
+; if a match was found
+ push hl
+ push bc
+ ld hl,wd736
+ set 2,[hl]
+ callba Func_c49d ; check if the player sprite is standing on a "door" tile
+ pop bc
+ pop hl
+ jr c,WarpFound1 ; if it is, go to 0735
+ push hl
+ push bc
+ call ExtraWarpCheck ; sets carry if the warp is confirmed
+ pop bc
+ pop hl
+ jr nc,CheckWarpsNoCollisionRetry2
+; if the extra check passed
+ ld a,[W_FLAGS_D733]
+ bit 2,a
+ jr nz,WarpFound1
+ push de
+ push bc
+ call Joypad
+ pop bc
+ pop de
+ ld a,[hJoyHeld] ; current joypad state
+ and a,%11110000 ; bit mask for directional buttons
+ jr z,CheckWarpsNoCollisionRetry2 ; if directional buttons aren't being pressed, do not pass through the warp
+ jr WarpFound1
+
+; check if the player has stepped onto a warp after having collided
+CheckWarpsCollision:: ; 0706 (0:0706)
+ ld a,[wd3ae] ; number of warps
+ ld c,a
+ ld hl,wd3af ; start of warp entries
+.loop
+ ld a,[hli] ; Y coordinate of warp
+ ld b,a
+ ld a,[W_YCOORD]
+ cp b
+ jr nz,.retry1
+ ld a,[hli] ; X coordinate of warp
+ ld b,a
+ ld a,[W_XCOORD]
+ cp b
+ jr nz,.retry2
+ ld a,[hli]
+ ld [wd42f],a ; save target warp ID
+ ld a,[hl]
+ ld [$ff8b],a ; save target map
+ jr WarpFound2
+.retry1
+ inc hl
+.retry2
+ inc hl
+ inc hl
+ dec c
+ jr nz,.loop
+ jp OverworldLoop
+
+CheckWarpsNoCollisionRetry1:: ; 072f (0:072f)
+ inc hl
+CheckWarpsNoCollisionRetry2:: ; 0730 (0:0730)
+ inc hl
+ inc hl
+ jp ContinueCheckWarpsNoCollisionLoop
+
+WarpFound1:: ; 0735 (0:0735)
+ ld a,[hli]
+ ld [wd42f],a ; save target warp ID
+ ld a,[hli]
+ ld [$ff8b],a ; save target map
+
+WarpFound2:: ; 073c (0:073c)
+ ld a,[wd3ae] ; number of warps
+ sub c
+ ld [wd73b],a ; save ID of used warp
+ ld a,[W_CURMAP]
+ ld [wd73c],a
+ call CheckIfInOutsideMap
+ jr nz,.indoorMaps
+; this is for handling "outside" maps that can't have the 0xFF destination map
+ ld a,[W_CURMAP]
+ ld [wLastMap],a
+ ld a,[W_CURMAPWIDTH]
+ ld [wd366],a
+ ld a,[$ff8b] ; destination map number
+ ld [W_CURMAP],a ; change current map to destination map
+ cp a,ROCK_TUNNEL_1
+ jr nz,.notRockTunnel
+ ld a,$06
+ ld [wd35d],a
+ call GBFadeIn1
+.notRockTunnel
+ call PlayMapChangeSound
+ jr .done
+; for maps that can have the 0xFF destination map, which means to return to the outside map; not all these maps are necessarily indoors, though
+.indoorMaps
+ ld a,[$ff8b] ; destination map
+ cp a,$ff
+ jr z,.goBackOutside
+; if not going back to the previous map
+ ld [W_CURMAP],a ; current map number
+ callba Func_70787 ; check if the warp was a Silph Co. teleporter
+ ld a,[wcd5b]
+ dec a
+ jr nz,.notTeleporter
+; if it's a Silph Co. teleporter
+ ld hl,wd732
+ set 3,[hl]
+ call DoFlyOrTeleportAwayGraphics
+ jr .skipMapChangeSound
+.notTeleporter
+ call PlayMapChangeSound
+.skipMapChangeSound
+ ld hl,wd736
+ res 0,[hl]
+ res 1,[hl]
+ jr .done
+.goBackOutside
+ ld a,[wLastMap]
+ ld [W_CURMAP],a
+ call PlayMapChangeSound
+ xor a
+ ld [wd35d],a
+.done
+ ld hl,wd736
+ set 0,[hl]
+ call Func_12da
+ jp EnterMap
+
+ContinueCheckWarpsNoCollisionLoop:: ; 07b5 (0:07b5)
+ inc b ; increment warp number
+ dec c ; decrement number of warps
+ jp nz,CheckWarpsNoCollisionLoop
+
+; if no matching warp was found
+CheckMapConnections:: ; 07ba (0:07ba)
+.checkWestMap
+ ld a,[W_XCOORD]
+ cp a,$ff
+ jr nz,.checkEastMap
+ ld a,[W_MAPCONN3PTR]
+ ld [W_CURMAP],a
+ ld a,[wd38f] ; new X coordinate upon entering west map
+ ld [W_XCOORD],a
+ ld a,[W_YCOORD]
+ ld c,a
+ ld a,[wd38e] ; Y adjustment upon entering west map
+ add c
+ ld c,a
+ ld [W_YCOORD],a
+ ld a,[wd390] ; pointer to upper left corner of map without adjustment for Y position
+ ld l,a
+ ld a,[wd391]
+ ld h,a
+ srl c
+ jr z,.savePointer1
+.pointerAdjustmentLoop1
+ ld a,[wd38d] ; width of connected map
+ add a,$06
+ ld e,a
+ ld d,$00
+ ld b,$00
+ add hl,de
+ dec c
+ jr nz,.pointerAdjustmentLoop1
+.savePointer1
+ ld a,l
+ ld [wd35f],a ; pointer to upper left corner of current tile block map section
+ ld a,h
+ ld [wd360],a
+ jp .loadNewMap
+.checkEastMap
+ ld b,a
+ ld a,[wd525] ; map width
+ cp b
+ jr nz,.checkNorthMap
+ ld a,[W_MAPCONN4PTR]
+ ld [W_CURMAP],a
+ ld a,[wd39a] ; new X coordinate upon entering east map
+ ld [W_XCOORD],a
+ ld a,[W_YCOORD]
+ ld c,a
+ ld a,[wd399] ; Y adjustment upon entering east map
+ add c
+ ld c,a
+ ld [W_YCOORD],a
+ ld a,[wd39b] ; pointer to upper left corner of map without adjustment for Y position
+ ld l,a
+ ld a,[wd39c]
+ ld h,a
+ srl c
+ jr z,.savePointer2
+.pointerAdjustmentLoop2
+ ld a,[wd398]
+ add a,$06
+ ld e,a
+ ld d,$00
+ ld b,$00
+ add hl,de
+ dec c
+ jr nz,.pointerAdjustmentLoop2
+.savePointer2
+ ld a,l
+ ld [wd35f],a ; pointer to upper left corner of current tile block map section
+ ld a,h
+ ld [wd360],a
+ jp .loadNewMap
+.checkNorthMap
+ ld a,[W_YCOORD]
+ cp a,$ff
+ jr nz,.checkSouthMap
+ ld a,[W_MAPCONN1PTR]
+ ld [W_CURMAP],a
+ ld a,[wd378] ; new Y coordinate upon entering north map
+ ld [W_YCOORD],a
+ ld a,[W_XCOORD]
+ ld c,a
+ ld a,[wd379] ; X adjustment upon entering north map
+ add c
+ ld c,a
+ ld [W_XCOORD],a
+ ld a,[wd37a] ; pointer to upper left corner of map without adjustment for X position
+ ld l,a
+ ld a,[wd37b]
+ ld h,a
+ ld b,$00
+ srl c
+ add hl,bc
+ ld a,l
+ ld [wd35f],a ; pointer to upper left corner of current tile block map section
+ ld a,h
+ ld [wd360],a
+ jp .loadNewMap
+.checkSouthMap
+ ld b,a
+ ld a,[wd524]
+ cp b
+ jr nz,.didNotEnterConnectedMap
+ ld a,[W_MAPCONN2PTR]
+ ld [W_CURMAP],a
+ ld a,[wd383] ; new Y coordinate upon entering south map
+ ld [W_YCOORD],a
+ ld a,[W_XCOORD]
+ ld c,a
+ ld a,[wd384] ; X adjustment upon entering south map
+ add c
+ ld c,a
+ ld [W_XCOORD],a
+ ld a,[wd385] ; pointer to upper left corner of map without adjustment for X position
+ ld l,a
+ ld a,[wd386]
+ ld h,a
+ ld b,$00
+ srl c
+ add hl,bc
+ ld a,l
+ ld [wd35f],a ; pointer to upper left corner of current tile block map section
+ ld a,h
+ ld [wd360],a
+.loadNewMap ; load the connected map that was entered
+ call LoadMapHeader
+ call Func_2312 ; music
+ ld b,$09
+ call GoPAL_SET
+; Since the sprite set shouldn't change, this will just update VRAM slots at
+; $C2XE without loading any tile patterns.
+ callba InitMapSprites
+ call LoadTileBlockMap
+ jp OverworldLoopLessDelay
+.didNotEnterConnectedMap
+ jp OverworldLoop
+
+; function to play a sound when changing maps
+PlayMapChangeSound:: ; 08c9 (0:08c9)
+ FuncCoord 8, 8
+ ld a,[Coord] ; upper left tile of the 4x4 square the player's sprite is standing on
+ cp a,$0b ; door tile in tileset 0
+ jr nz,.didNotGoThroughDoor
+ ld a,(SFX_02_57 - SFX_Headers_02) / 3
+ jr .playSound
+.didNotGoThroughDoor
+ ld a,(SFX_02_5c - SFX_Headers_02) / 3
+.playSound
+ call PlaySound
+ ld a,[wd35d]
+ and a
+ ret nz
+ jp GBFadeIn1
+
+CheckIfInOutsideMap:: ; 08e1 (0:08e1)
+; If the player is in an outside map (a town or route), set the z flag
+ ld a, [W_CURMAPTILESET]
+ and a ; most towns/routes have tileset 0 (OVERWORLD)
+ ret z
+ cp PLATEAU ; Route 23 / Indigo Plateau
+ ret
+
+; this function is an extra check that sometimes has to pass in order to warp, beyond just standing on a warp
+; the "sometimes" qualification is necessary because of CheckWarpsNoCollision's behavior
+; depending on the map, either "function 1" or "function 2" is used for the check
+; "function 1" passes when the player is at the edge of the map and is facing towards the outside of the map
+; "function 2" passes when the the tile in front of the player is among a certain set
+; sets carry if the check passes, otherwise clears carry
+ExtraWarpCheck:: ; 08e9 (0:08e9)
+ ld a, [W_CURMAP]
+ cp SS_ANNE_3
+ jr z, .useFunction1
+ cp ROCKET_HIDEOUT_1
+ jr z, .useFunction2
+ cp ROCKET_HIDEOUT_2
+ jr z, .useFunction2
+ cp ROCKET_HIDEOUT_4
+ jr z, .useFunction2
+ cp ROCK_TUNNEL_1
+ jr z, .useFunction2
+ ld a, [W_CURMAPTILESET]
+ and a ; outside tileset (OVERWORLD)
+ jr z, .useFunction2
+ cp SHIP ; S.S. Anne tileset
+ jr z, .useFunction2
+ cp SHIP_PORT ; Vermilion Port tileset
+ jr z, .useFunction2
+ cp PLATEAU ; Indigo Plateau tileset
+ jr z, .useFunction2
+.useFunction1
+ ld hl, Func_c3ff
+ jr .doBankswitch
+.useFunction2
+ ld hl, Func_c44e
+.doBankswitch
+ ld b, BANK(Func_c44e)
+ jp Bankswitch
+
+MapEntryAfterBattle:: ; 091f (0:091f)
+ callba Func_c35f ; function that appears to disable warp testing after collisions if the player is standing on a warp
+ ld a,[wd35d]
+ and a
+ jp z,GBFadeIn2
+ jp LoadGBPal
+
+HandleBlackOut::
+; For when all the player's pokemon faint.
+; Does not print the "blacked out" message.
+
+ call GBFadeIn1
+ ld a, $08
+ call StopMusic
+ ld hl, wd72e
+ res 5, [hl]
+ ld a, Bank(Func_40b0) ; also Bank(Func_62ce) and Bank(Func_5d5f)
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
+ call Func_40b0
+ call Func_62ce
+ call Func_2312
+ jp Func_5d5f
+
+StopMusic::
+ ld [wMusicHeaderPointer], a
+ ld a, $ff
+ ld [wc0ee], a
+ call PlaySound
+.wait
+ ld a, [wMusicHeaderPointer]
+ and a
+ jr nz, .wait
+ jp StopAllSounds
+
+HandleFlyOrTeleportAway::
+ call UpdateSprites
+ call Delay3
+ xor a
+ ld [wcf0b], a
+ ld [wd700], a
+ ld [W_ISINBATTLE], a
+ ld [wd35d], a
+ ld hl, wd732
+ set 2, [hl]
+ res 5, [hl]
+ call DoFlyOrTeleportAwayGraphics
+ ld a, Bank(Func_62ce)
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+ call Func_62ce
+ jp Func_5d5f
+
+DoFlyOrTeleportAwayGraphics::
+ ld b, BANK(_DoFlyOrTeleportAwayGraphics)
+ ld hl, _DoFlyOrTeleportAwayGraphics
+ jp Bankswitch
+
+LoadPlayerSpriteGraphics::
+; Load sprite graphics based on whether the player is standing, biking, or surfing.
+
+ ; 0: standing
+ ; 1: biking
+ ; 2: surfing
+
+ ld a, [wd700]
+ dec a
+ jr z, .ridingBike
+
+ ld a, [$ffd7]
+ and a
+ jr nz, .determineGraphics
+ jr .startWalking
+
+.ridingBike
+ ; If the bike can't be used,
+ ; start walking instead.
+ call IsBikeRidingAllowed
+ jr c, .determineGraphics
+
+.startWalking
+ xor a
+ ld [wd700], a
+ ld [wd11a], a
+ jp LoadWalkingPlayerSpriteGraphics
+
+.determineGraphics
+ ld a, [wd700]
+ and a
+ jp z, LoadWalkingPlayerSpriteGraphics
+ dec a
+ jp z, LoadBikePlayerSpriteGraphics
+ dec a
+ jp z, LoadSurfingPlayerSpriteGraphics
+ jp LoadWalkingPlayerSpriteGraphics
+
+IsBikeRidingAllowed::
+; The bike can be used on Route 23 and Indigo Plateau,
+; or maps with tilesets in BikeRidingTilesets.
+; Return carry if biking is allowed.
+
+ ld a, [W_CURMAP]
+ cp ROUTE_23
+ jr z, .allowed
+ cp INDIGO_PLATEAU
+ jr z, .allowed
+
+ ld a, [W_CURMAPTILESET]
+ ld b, a
+ ld hl, BikeRidingTilesets
+.loop
+ ld a, [hli]
+ cp b
+ jr z, .allowed
+ inc a
+ jr nz, .loop
+ and a
+ ret
+
+.allowed
+ scf
+ ret
+
+INCLUDE "data/bike_riding_tilesets.asm"
+
+; load the tile pattern data of the current tileset into VRAM
+LoadTilesetTilePatternData:: ; 09e8 (0:09e8)
+ ld a,[W_TILESETGFXPTR]
+ ld l,a
+ ld a,[W_TILESETGFXPTR + 1]
+ ld h,a
+ ld de,vTileset
+ ld bc,$600
+ ld a,[W_TILESETBANK]
+ jp FarCopyData2
+
+; this loads the current maps complete tile map (which references blocks, not individual tiles) to C6E8
+; it can also load partial tile maps of connected maps into a border of length 3 around the current map
+LoadTileBlockMap:: ; 09fc (0:09fc)
+; fill C6E8-CBFB with the background tile
+ ld hl,wOverworldMap
+ ld a,[wd3ad] ; background tile number
+ ld d,a
+ ld bc,$0514
+.backgroundTileLoop
+ ld a,d
+ ld [hli],a
+ dec bc
+ ld a,c
+ or b
+ jr nz,.backgroundTileLoop
+; load tile map of current map (made of tile block IDs)
+; a 3-byte border at the edges of the map is kept so that there is space for map connections
+ ld hl,wOverworldMap
+ ld a,[W_CURMAPWIDTH]
+ ld [$ff8c],a
+ add a,$06 ; border (east and west)
+ ld [$ff8b],a ; map width + border
+ ld b,$00
+ ld c,a
+; make space for north border (next 3 lines)
+ add hl,bc
+ add hl,bc
+ add hl,bc
+ ld c,$03
+ add hl,bc ; this puts us past the (west) border
+ ld a,[W_MAPDATAPTR] ; tile map pointer
+ ld e,a
+ ld a,[W_MAPDATAPTR + 1]
+ ld d,a ; de = tile map pointer
+ ld a,[W_CURMAPHEIGHT]
+ ld b,a
+.rowLoop ; copy one row each iteration
+ push hl
+ ld a,[$ff8c] ; map width (without border)
+ ld c,a
+.rowInnerLoop
+ ld a,[de]
+ inc de
+ ld [hli],a
+ dec c
+ jr nz,.rowInnerLoop
+; add the map width plus the border to the base address of the current row to get the next row's address
+ pop hl
+ ld a,[$ff8b] ; map width + border
+ add l
+ ld l,a
+ jr nc,.noCarry
+ inc h
+.noCarry
+ dec b
+ jr nz,.rowLoop
+.northConnection
+ ld a,[W_MAPCONN1PTR]
+ cp a,$ff
+ jr z,.southConnection
+ call SwitchToMapRomBank
+ ld a,[wd372]
+ ld l,a
+ ld a,[wd373]
+ ld h,a
+ ld a,[wd374]
+ ld e,a
+ ld a,[wd375]
+ ld d,a
+ ld a,[wd376]
+ ld [$ff8b],a
+ ld a,[wd377]
+ ld [$ff8c],a
+ call LoadNorthSouthConnectionsTileMap
+.southConnection
+ ld a,[W_MAPCONN2PTR]
+ cp a,$ff
+ jr z,.westConnection
+ call SwitchToMapRomBank
+ ld a,[wd37d]
+ ld l,a
+ ld a,[wd37e]
+ ld h,a
+ ld a,[wd37f]
+ ld e,a
+ ld a,[wd380]
+ ld d,a
+ ld a,[wd381]
+ ld [$ff8b],a
+ ld a,[wd382]
+ ld [$ff8c],a
+ call LoadNorthSouthConnectionsTileMap
+.westConnection
+ ld a,[W_MAPCONN3PTR]
+ cp a,$ff
+ jr z,.eastConnection
+ call SwitchToMapRomBank
+ ld a,[wd388]
+ ld l,a
+ ld a,[wd389]
+ ld h,a
+ ld a,[wd38a]
+ ld e,a
+ ld a,[wd38b]
+ ld d,a
+ ld a,[wd38c]
+ ld b,a
+ ld a,[wd38d]
+ ld [$ff8b],a
+ call LoadEastWestConnectionsTileMap
+.eastConnection
+ ld a,[W_MAPCONN4PTR]
+ cp a,$ff
+ jr z,.done
+ call SwitchToMapRomBank
+ ld a,[wd393]
+ ld l,a
+ ld a,[wd394]
+ ld h,a
+ ld a,[wd395]
+ ld e,a
+ ld a,[wd396]
+ ld d,a
+ ld a,[wd397]
+ ld b,a
+ ld a,[wd398]
+ ld [$ff8b],a
+ call LoadEastWestConnectionsTileMap
+.done
+ ret
+
+LoadNorthSouthConnectionsTileMap:: ; 0ade (0:0ade)
+ ld c,$03
+.loop
+ push de
+ push hl
+ ld a,[$ff8b] ; width of connection
+ ld b,a
+.innerLoop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec b
+ jr nz,.innerLoop
+ pop hl
+ pop de
+ ld a,[$ff8c] ; width of connected map
+ add l
+ ld l,a
+ jr nc,.noCarry1
+ inc h
+.noCarry1
+ ld a,[W_CURMAPWIDTH]
+ add a,$06
+ add e
+ ld e,a
+ jr nc,.noCarry2
+ inc d
+.noCarry2
+ dec c
+ jr nz,.loop
+ ret
+
+LoadEastWestConnectionsTileMap:: ; 0b02 (0:0b02)
+ push hl
+ push de
+ ld c,$03
+.innerLoop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec c
+ jr nz,.innerLoop
+ pop de
+ pop hl
+ ld a,[$ff8b] ; width of connected map
+ add l
+ ld l,a
+ jr nc,.noCarry1
+ inc h
+.noCarry1
+ ld a,[W_CURMAPWIDTH]
+ add a,$06
+ add e
+ ld e,a
+ jr nc,.noCarry2
+ inc d
+.noCarry2
+ dec b
+ jr nz,LoadEastWestConnectionsTileMap
+ ret
+
+; function to check if there is a sign or sprite in front of the player
+; if so, it is stored in [$FF8C]
+; if not, [$FF8C] is set to 0
+IsSpriteOrSignInFrontOfPlayer:: ; 0b23 (0:0b23)
+ xor a
+ ld [$ff8c],a
+ ld a,[wd4b0] ; number of signs in the map
+ and a
+ jr z,.extendRangeOverCounter
+; if there are signs
+ ld a,$35
+ call Predef ; get the coordinates in front of the player in de
+ ld hl,wd4b1 ; start of sign coordinates
+ ld a,[wd4b0] ; number of signs in the map
+ ld b,a
+ ld c,$00
+.signLoop
+ inc c
+ ld a,[hli] ; sign Y
+ cp d
+ jr z,.yCoordMatched
+ inc hl
+ jr .retry
+.yCoordMatched
+ ld a,[hli] ; sign X
+ cp e
+ jr nz,.retry
+.xCoordMatched
+; found sign
+ push hl
+ push bc
+ ld hl,wd4d1 ; start of sign text ID's
+ ld b,$00
+ dec c
+ add hl,bc
+ ld a,[hl]
+ ld [$ff8c],a ; store sign text ID
+ pop bc
+ pop hl
+ ret
+.retry
+ dec b
+ jr nz,.signLoop
+; check if the player is front of a counter in a pokemon center, pokemart, etc. and if so, extend the range at which he can talk to the NPC
+.extendRangeOverCounter
+ ld a,$35
+ call Predef ; get the tile in front of the player in c
+ ld hl,W_TILESETTALKINGOVERTILES ; list of tiles that extend talking range (counter tiles)
+ ld b,$03
+ ld d,$20 ; talking range in pixels (long range)
+.counterTilesLoop
+ ld a,[hli]
+ cp c
+ jr z,IsSpriteInFrontOfPlayer2 ; jumps if the tile in front of the player is a counter tile
+ dec b
+ jr nz,.counterTilesLoop
+
+; part of the above function, but sometimes its called on its own, when signs are irrelevant
+; the caller must zero [$FF8C]
+IsSpriteInFrontOfPlayer:: ; 0b6b (0:0b6b)
+ ld d,$10 ; talking range in pixels (normal range)
+IsSpriteInFrontOfPlayer2:: ; 0b6d (0:0b6d)
+ ld bc,$3c40 ; Y and X position of player sprite
+ ld a,[wSpriteStateData1 + 9] ; direction the player is facing
+.checkIfPlayerFacingUp
+ cp a,$04
+ jr nz,.checkIfPlayerFacingDown
+; facing up
+ ld a,b
+ sub d
+ ld b,a
+ ld a,$08
+ jr .doneCheckingDirection
+.checkIfPlayerFacingDown
+ cp a,$00
+ jr nz,.checkIfPlayerFacingRight
+; facing down
+ ld a,b
+ add d
+ ld b,a
+ ld a,$04
+ jr .doneCheckingDirection
+.checkIfPlayerFacingRight
+ cp a,$0c
+ jr nz,.playerFacingLeft
+; facing right
+ ld a,c
+ add d
+ ld c,a
+ ld a,$01
+ jr .doneCheckingDirection
+.playerFacingLeft
+; facing left
+ ld a,c
+ sub d
+ ld c,a
+ ld a,$02
+.doneCheckingDirection
+ ld [wd52a],a
+ ld a,[W_NUMSPRITES] ; number of sprites
+ and a
+ ret z
+; if there are sprites
+ ld hl,wSpriteStateData1 + $10
+ ld d,a
+ ld e,$01
+.spriteLoop
+ push hl
+ ld a,[hli] ; image (0 if no sprite)
+ and a
+ jr z,.nextSprite
+ inc l
+ ld a,[hli] ; sprite visibility
+ inc a
+ jr z,.nextSprite
+ inc l
+ ld a,[hli] ; Y location
+ cp b
+ jr nz,.nextSprite
+ inc l
+ ld a,[hl] ; X location
+ cp c
+ jr z,.foundSpriteInFrontOfPlayer
+.nextSprite
+ pop hl
+ ld a,l
+ add a,$10
+ ld l,a
+ inc e
+ dec d
+ jr nz,.spriteLoop
+ ret
+.foundSpriteInFrontOfPlayer
+ pop hl
+ ld a,l
+ and a,$f0
+ inc a
+ ld l,a
+ set 7,[hl]
+ ld a,e
+ ld [$ff8c],a ; store sprite ID
+ ret
+
+; function to check if the player will jump down a ledge and check if the tile ahead is passable (when not surfing)
+; sets the carry flag if there is a collision, and unsets it if there isn't a collision
+CollisionCheckOnLand:: ; 0bd1 (0:0bd1)
+ ld a,[wd736]
+ bit 6,a ; is the player jumping?
+ jr nz,.noCollision
+; if not jumping a ledge
+ ld a,[wcd38]
+ and a
+ jr nz,.noCollision
+ ld a,[wd52a] ; the direction that the player is trying to go in
+ ld d,a
+ ld a,[wSpriteStateData1 + 12] ; the player sprite's collision data (bit field) (set in the sprite movement code)
+ and d ; check if a sprite is in the direction the player is trying to go
+ jr nz,.collision
+ xor a
+ ld [$ff8c],a
+ call IsSpriteInFrontOfPlayer ; check for sprite collisions again? when does the above check fail to detect a sprite collision?
+ ld a,[$ff8c]
+ and a ; was there a sprite collision?
+ jr nz,.collision
+; if no sprite collision
+ ld hl,TilePairCollisionsLand
+ call CheckForJumpingAndTilePairCollisions
+ jr c,.collision
+ call CheckTilePassable
+ jr nc,.noCollision
+.collision
+ ld a,[wc02a]
+ cp a,(SFX_02_5b - SFX_Headers_02) / 3 ; check if collision sound is already playing
+ jr z,.setCarry
+ ld a,(SFX_02_5b - SFX_Headers_02) / 3
+ call PlaySound ; play collision sound (if it's not already playing)
+.setCarry
+ scf
+ ret
+.noCollision
+ and a
+ ret
+
+; function that checks if the tile in front of the player is passable
+; clears carry if it is, sets carry if not
+CheckTilePassable:: ; 0c10 (0:0c10)
+ ld a,$35
+ call Predef ; get tile in front of player
+ ld a,[wcfc6] ; tile in front of player
+ ld c,a
+ ld hl,W_TILESETCOLLISIONPTR ; pointer to list of passable tiles
+ ld a,[hli]
+ ld h,[hl]
+ ld l,a ; hl now points to passable tiles
+.loop
+ ld a,[hli]
+ cp a,$ff
+ jr z,.tileNotPassable
+ cp c
+ ret z
+ jr .loop
+.tileNotPassable
+ scf
+ ret
+
+; check if the player is going to jump down a small ledge
+; and check for collisions that only occur between certain pairs of tiles
+; Input: hl - address of directional collision data
+; sets carry if there is a collision and unsets carry if not
+CheckForJumpingAndTilePairCollisions:: ; 0c2a (0:0c2a)
+ push hl
+ ld a,$35
+ call Predef ; get the tile in front of the player
+ push de
+ push bc
+ callba HandleLedges ; check if the player is trying to jump a ledge
+ pop bc
+ pop de
+ pop hl
+ and a
+ ld a,[wd736]
+ bit 6,a ; is the player jumping?
+ ret nz
+; if not jumping
+
+Func_c44:: ; 0c44 (0:0c44)
+ FuncCoord 8, 9
+ ld a,[Coord] ; tile the player is on
+ ld [wcf0e],a
+
+CheckForTilePairCollisions:: ; 0c4a (0:0c4a)
+ ld a,[wcfc6] ; tile in front of the player
+ ld c,a
+.tilePairCollisionLoop
+ ld a,[W_CURMAPTILESET] ; tileset number
+ ld b,a
+ ld a,[hli]
+ cp a,$ff
+ jr z,.noMatch
+ cp b
+ jr z,.tilesetMatches
+ inc hl
+.retry
+ inc hl
+ jr .tilePairCollisionLoop
+.tilesetMatches
+ ld a,[wcf0e] ; tile the player is on
+ ld b,a
+ ld a,[hl]
+ cp b
+ jr z,.currentTileMatchesFirstInPair
+ inc hl
+ ld a,[hl]
+ cp b
+ jr z,.currentTileMatchesSecondInPair
+ jr .retry
+.currentTileMatchesFirstInPair
+ inc hl
+ ld a,[hl]
+ cp c
+ jr z,.foundMatch
+ jr .tilePairCollisionLoop
+.currentTileMatchesSecondInPair
+ dec hl
+ ld a,[hli]
+ cp c
+ inc hl
+ jr nz,.tilePairCollisionLoop
+.foundMatch
+ scf
+ ret
+.noMatch
+ and a
+ ret
+
+; FORMAT: tileset number, tile 1, tile 2
+; terminated by 0xFF
+; these entries indicate that the player may not cross between tile 1 and tile 2
+; it's mainly used to simulate differences in elevation
+
+TilePairCollisionsLand:: ; 0c7e (0:0c7e)
+ db CAVERN, $20, $05
+ db CAVERN, $41, $05
+ db FOREST, $30, $2E
+ db CAVERN, $2A, $05
+ db CAVERN, $05, $21
+ db FOREST, $52, $2E
+ db FOREST, $55, $2E
+ db FOREST, $56, $2E
+ db FOREST, $20, $2E
+ db FOREST, $5E, $2E
+ db FOREST, $5F, $2E
+ db $FF
+
+TilePairCollisionsWater:: ; 0ca0 (0:0ca0)
+ db FOREST, $14, $2E
+ db FOREST, $48, $2E
+ db CAVERN, $14, $05
+ db $FF
+
+; this builds a tile map from the tile block map based on the current X/Y coordinates of the player's character
+LoadCurrentMapView:: ; 0caa (0:0caa)
+ ld a,[H_LOADEDROMBANK]
+ push af
+ ld a,[W_TILESETBANK] ; tile data ROM bank
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a ; switch to ROM bank that contains tile data
+ ld a,[wd35f] ; address of upper left corner of current map view
+ ld e,a
+ ld a,[wd360]
+ ld d,a
+ ld hl,wTileMapBackup
+ ld b,$05
+.rowLoop ; each loop iteration fills in one row of tile blocks
+ push hl
+ push de
+ ld c,$06
+.rowInnerLoop ; loop to draw each tile block of the current row
+ push bc
+ push de
+ push hl
+ ld a,[de]
+ ld c,a ; tile block number
+ call DrawTileBlock
+ pop hl
+ pop de
+ pop bc
+ inc hl
+ inc hl
+ inc hl
+ inc hl
+ inc de
+ dec c
+ jr nz,.rowInnerLoop
+; update tile block map pointer to next row's address
+ pop de
+ ld a,[W_CURMAPWIDTH]
+ add a,$06
+ add e
+ ld e,a
+ jr nc,.noCarry
+ inc d
+.noCarry
+; update tile map pointer to next row's address
+ pop hl
+ ld a,$60
+ add l
+ ld l,a
+ jr nc,.noCarry2
+ inc h
+.noCarry2
+ dec b
+ jr nz,.rowLoop
+ ld hl,wTileMapBackup
+ ld bc,$0000
+.adjustForYCoordWithinTileBlock
+ ld a,[W_YBLOCKCOORD]
+ and a
+ jr z,.adjustForXCoordWithinTileBlock
+ ld bc,$0030
+ add hl,bc
+.adjustForXCoordWithinTileBlock
+ ld a,[W_XBLOCKCOORD]
+ and a
+ jr z,.copyToVisibleAreaBuffer
+ ld bc,$0002
+ add hl,bc
+.copyToVisibleAreaBuffer
+ ld de,wTileMap ; base address for the tiles that are directly transfered to VRAM during V-blank
+ ld b,$12
+.rowLoop2
+ ld c,$14
+.rowInnerLoop2
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec c
+ jr nz,.rowInnerLoop2
+ ld a,$04
+ add l
+ ld l,a
+ jr nc,.noCarry3
+ inc h
+.noCarry3
+ dec b
+ jr nz,.rowLoop2
+ pop af
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a ; restore previous ROM bank
+ ret
+
+AdvancePlayerSprite:: ; 0d27 (0:0d27)
+ ld a,[wSpriteStateData1 + 3] ; delta Y
+ ld b,a
+ ld a,[wSpriteStateData1 + 5] ; delta X
+ ld c,a
+ ld hl,wWalkCounter ; walking animation counter
+ dec [hl]
+ jr nz,.afterUpdateMapCoords
+; if it's the end of the animation, update the player's map coordinates
+ ld a,[W_YCOORD]
+ add b
+ ld [W_YCOORD],a
+ ld a,[W_XCOORD]
+ add c
+ ld [W_XCOORD],a
+.afterUpdateMapCoords
+ ld a,[wWalkCounter] ; walking animation counter
+ cp a,$07
+ jp nz,.scrollBackgroundAndSprites
+; if this is the first iteration of the animation
+ ld a,c
+ cp a,$01
+ jr nz,.checkIfMovingWest
+; moving east
+ ld a,[wd526]
+ ld e,a
+ and a,$e0
+ ld d,a
+ ld a,e
+ add a,$02
+ and a,$1f
+ or d
+ ld [wd526],a
+ jr .adjustXCoordWithinBlock
+.checkIfMovingWest
+ cp a,$ff
+ jr nz,.checkIfMovingSouth
+; moving west
+ ld a,[wd526]
+ ld e,a
+ and a,$e0
+ ld d,a
+ ld a,e
+ sub a,$02
+ and a,$1f
+ or d
+ ld [wd526],a
+ jr .adjustXCoordWithinBlock
+.checkIfMovingSouth
+ ld a,b
+ cp a,$01
+ jr nz,.checkIfMovingNorth
+; moving south
+ ld a,[wd526]
+ add a,$40
+ ld [wd526],a
+ jr nc,.adjustXCoordWithinBlock
+ ld a,[wd527]
+ inc a
+ and a,$03
+ or a,$98
+ ld [wd527],a
+ jr .adjustXCoordWithinBlock
+.checkIfMovingNorth
+ cp a,$ff
+ jr nz,.adjustXCoordWithinBlock
+; moving north
+ ld a,[wd526]
+ sub a,$40
+ ld [wd526],a
+ jr nc,.adjustXCoordWithinBlock
+ ld a,[wd527]
+ dec a
+ and a,$03
+ or a,$98
+ ld [wd527],a
+.adjustXCoordWithinBlock
+ ld a,c
+ and a
+ jr z,.pointlessJump ; mistake?
+.pointlessJump
+ ld hl,W_XBLOCKCOORD
+ ld a,[hl]
+ add c
+ ld [hl],a
+ cp a,$02
+ jr nz,.checkForMoveToWestBlock
+; moved into the tile block to the east
+ xor a
+ ld [hl],a
+ ld hl,wd4e3
+ inc [hl]
+ ld de,wd35f
+ call MoveTileBlockMapPointerEast
+ jr .updateMapView
+.checkForMoveToWestBlock
+ cp a,$ff
+ jr nz,.adjustYCoordWithinBlock
+; moved into the tile block to the west
+ ld a,$01
+ ld [hl],a
+ ld hl,wd4e3
+ dec [hl]
+ ld de,wd35f
+ call MoveTileBlockMapPointerWest
+ jr .updateMapView
+.adjustYCoordWithinBlock
+ ld hl,W_YBLOCKCOORD
+ ld a,[hl]
+ add b
+ ld [hl],a
+ cp a,$02
+ jr nz,.checkForMoveToNorthBlock
+; moved into the tile block to the south
+ xor a
+ ld [hl],a
+ ld hl,wd4e2
+ inc [hl]
+ ld de,wd35f
+ ld a,[W_CURMAPWIDTH]
+ call MoveTileBlockMapPointerSouth
+ jr .updateMapView
+.checkForMoveToNorthBlock
+ cp a,$ff
+ jr nz,.updateMapView
+; moved into the tile block to the north
+ ld a,$01
+ ld [hl],a
+ ld hl,wd4e2
+ dec [hl]
+ ld de,wd35f
+ ld a,[W_CURMAPWIDTH]
+ call MoveTileBlockMapPointerNorth
+.updateMapView
+ call LoadCurrentMapView
+ ld a,[wSpriteStateData1 + 3] ; delta Y
+ cp a,$01
+ jr nz,.checkIfMovingNorth2
+; if moving south
+ call ScheduleSouthRowRedraw
+ jr .scrollBackgroundAndSprites
+.checkIfMovingNorth2
+ cp a,$ff
+ jr nz,.checkIfMovingEast2
+; if moving north
+ call ScheduleNorthRowRedraw
+ jr .scrollBackgroundAndSprites
+.checkIfMovingEast2
+ ld a,[wSpriteStateData1 + 5] ; delta X
+ cp a,$01
+ jr nz,.checkIfMovingWest2
+; if moving east
+ call ScheduleEastColumnRedraw
+ jr .scrollBackgroundAndSprites
+.checkIfMovingWest2
+ cp a,$ff
+ jr nz,.scrollBackgroundAndSprites
+; if moving west
+ call ScheduleWestColumnRedraw
+.scrollBackgroundAndSprites
+ ld a,[wSpriteStateData1 + 3] ; delta Y
+ ld b,a
+ ld a,[wSpriteStateData1 + 5] ; delta X
+ ld c,a
+ sla b
+ sla c
+ ld a,[$ffaf]
+ add b
+ ld [$ffaf],a ; update background scroll Y
+ ld a,[$ffae]
+ add c
+ ld [$ffae],a ; update background scroll X
+; shift all the sprites in the direction opposite of the player's motion
+; so that the player appears to move relative to them
+ ld hl,wSpriteStateData1 + $14
+ ld a,[W_NUMSPRITES] ; number of sprites
+ and a ; are there any sprites?
+ jr z,.done
+ ld e,a
+.spriteShiftLoop
+ ld a,[hl]
+ sub b
+ ld [hli],a
+ inc l
+ ld a,[hl]
+ sub c
+ ld [hl],a
+ ld a,$0e
+ add l
+ ld l,a
+ dec e
+ jr nz,.spriteShiftLoop
+.done
+ ret
+
+; the following four functions are used to move the pointer to the upper left
+; corner of the tile block map in the direction of motion
+
+MoveTileBlockMapPointerEast:: ; 0e65 (0:0e65)
+ ld a,[de]
+ add a,$01
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ inc a
+ ld [de],a
+ ret
+
+MoveTileBlockMapPointerWest:: ; 0e6f (0:0e6f)
+ ld a,[de]
+ sub a,$01
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ dec a
+ ld [de],a
+ ret
+
+MoveTileBlockMapPointerSouth:: ; 0e79 (0:0e79)
+ add a,$06
+ ld b,a
+ ld a,[de]
+ add b
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ inc a
+ ld [de],a
+ ret
+
+MoveTileBlockMapPointerNorth:: ; 0e85 (0:0e85)
+ add a,$06
+ ld b,a
+ ld a,[de]
+ sub b
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ dec a
+ ld [de],a
+ ret
+
+; the following 6 functions are used to tell the V-blank handler to redraw
+; the portion of the map that was newly exposed due to the player's movement
+
+ScheduleNorthRowRedraw:: ; 0e91 (0:0e91)
+ FuncCoord 0, 0
+ ld hl,Coord
+ call ScheduleRowRedrawHelper
+ ld a,[wd526]
+ ld [H_SCREENEDGEREDRAWADDR],a
+ ld a,[wd527]
+ ld [H_SCREENEDGEREDRAWADDR + 1],a
+ ld a,REDRAWROW
+ ld [H_SCREENEDGEREDRAW],a
+ ret
+
+ScheduleRowRedrawHelper:: ; 0ea6 (0:0ea6)
+ ld de,wScreenEdgeTiles
+ ld c,$28
+.loop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec c
+ jr nz,.loop
+ ret
+
+ScheduleSouthRowRedraw:: ; 0eb2 (0:0eb2)
+ FuncCoord 0,16
+ ld hl,Coord
+ call ScheduleRowRedrawHelper
+ ld a,[wd526]
+ ld l,a
+ ld a,[wd527]
+ ld h,a
+ ld bc,$0200
+ add hl,bc
+ ld a,h
+ and a,$03
+ or a,$98
+ ld [H_SCREENEDGEREDRAWADDR + 1],a
+ ld a,l
+ ld [H_SCREENEDGEREDRAWADDR],a
+ ld a,REDRAWROW
+ ld [H_SCREENEDGEREDRAW],a
+ ret
+
+ScheduleEastColumnRedraw:: ; 0ed3 (0:0ed3)
+ FuncCoord 18,0
+ ld hl,Coord
+ call ScheduleColumnRedrawHelper
+ ld a,[wd526]
+ ld c,a
+ and a,$e0
+ ld b,a
+ ld a,c
+ add a,18
+ and a,$1f
+ or b
+ ld [H_SCREENEDGEREDRAWADDR],a
+ ld a,[wd527]
+ ld [H_SCREENEDGEREDRAWADDR + 1],a
+ ld a,REDRAWCOL
+ ld [H_SCREENEDGEREDRAW],a
+ ret
+
+ScheduleColumnRedrawHelper:: ; 0ef2 (0:0ef2)
+ ld de,wScreenEdgeTiles
+ ld c,$12
+.loop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ ld a,[hl]
+ ld [de],a
+ inc de
+ ld a,19
+ add l
+ ld l,a
+ jr nc,.noCarry
+ inc h
+.noCarry
+ dec c
+ jr nz,.loop
+ ret
+
+ScheduleWestColumnRedraw:: ; 0f08 (0:0f08)
+ FuncCoord 0,0
+ ld hl,Coord
+ call ScheduleColumnRedrawHelper
+ ld a,[wd526]
+ ld [H_SCREENEDGEREDRAWADDR],a
+ ld a,[wd527]
+ ld [H_SCREENEDGEREDRAWADDR + 1],a
+ ld a,REDRAWCOL
+ ld [H_SCREENEDGEREDRAW],a
+ ret
+
+; function to write the tiles that make up a tile block to memory
+; Input: c = tile block ID, hl = destination address
+DrawTileBlock:: ; 0f1d (0:0f1d)
+ push hl
+ ld a,[W_TILESETBLOCKSPTR] ; pointer to tiles
+ ld l,a
+ ld a,[W_TILESETBLOCKSPTR + 1]
+ ld h,a
+ ld a,c
+ swap a
+ ld b,a
+ and a,$f0
+ ld c,a
+ ld a,b
+ and a,$0f
+ ld b,a ; bc = tile block ID * 0x10
+ add hl,bc
+ ld d,h
+ ld e,l ; de = address of the tile block's tiles
+ pop hl
+ ld c,$04 ; 4 loop iterations
+.loop ; each loop iteration, write 4 tile numbers
+ push bc
+ ld a,[de]
+ ld [hli],a
+ inc de
+ ld a,[de]
+ ld [hli],a
+ inc de
+ ld a,[de]
+ ld [hli],a
+ inc de
+ ld a,[de]
+ ld [hl],a
+ inc de
+ ld bc,$0015
+ add hl,bc
+ pop bc
+ dec c
+ jr nz,.loop
+ ret
+
+; function to update joypad state and simulate button presses
+JoypadOverworld:: ; 0f4d (0:0f4d)
+ xor a
+ ld [wSpriteStateData1 + 3],a
+ ld [wSpriteStateData1 + 5],a
+ call RunMapScript
+ call Joypad
+ ld a,[W_FLAGS_D733]
+ bit 3,a ; check if a trainer wants a challenge
+ jr nz,.notForcedDownwards
+ ld a,[W_CURMAP]
+ cp a,ROUTE_17 ; Cycling Road
+ jr nz,.notForcedDownwards
+ ld a,[hJoyHeld] ; current joypad state
+ and a,%11110011 ; bit mask for all directions and A/B
+ jr nz,.notForcedDownwards
+ ld a,%10000000 ; down pressed
+ ld [hJoyHeld],a ; on the cycling road, if there isn't a trainer and the player isn't pressing buttons, simulate a down press
+.notForcedDownwards
+ ld a,[wd730]
+ bit 7,a
+ ret z
+; if simulating button presses
+ ld a,[hJoyHeld] ; current joypad state
+ ld b,a
+ ld a,[wcd3b] ; bit mask for button presses that override simulated ones
+ and b
+ ret nz ; return if the simulated button presses are overridden
+ ld hl,wcd38 ; index of current simulated button press
+ dec [hl]
+ ld a,[hl]
+ cp a,$ff
+ jr z,.doneSimulating ; if the end of the simulated button presses has been reached
+ ld hl,wccd3 ; base address of simulated button presses
+; add offset to base address
+ add l
+ ld l,a
+ jr nc,.noCarry
+ inc h
+.noCarry
+ ld a,[hl]
+ ld [hJoyHeld],a ; store simulated button press in joypad state
+ and a
+ ret nz
+ ld [hJoyPressed],a
+ ld [hJoyReleased],a
+ ret
+; if done simulating button presses
+.doneSimulating
+ xor a
+ ld [wcd3a],a
+ ld [wcd38],a
+ ld [wccd3],a
+ ld [wJoyIgnore],a
+ ld [hJoyHeld],a
+ ld hl,wd736
+ ld a,[hl]
+ and a,$f8
+ ld [hl],a
+ ld hl,wd730
+ res 7,[hl]
+ ret
+
+; function to check the tile ahead to determine if the character should get on land or keep surfing
+; sets carry if there is a collision and clears carry otherwise
+; It seems that this function has a bug in it, but due to luck, it doesn't
+; show up. After detecting a sprite collision, it jumps to the code that
+; checks if the next tile is passable instead of just directly jumping to the
+; "collision detected" code. However, it doesn't store the next tile in c,
+; so the old value of c is used. 2429 is always called before this function,
+; and 2429 always sets c to 0xF0. There is no 0xF0 background tile, so it
+; is considered impassable and it is detected as a collision.
+CollisionCheckOnWater:: ; 0fb7 (0:0fb7)
+ ld a,[wd730]
+ bit 7,a
+ jp nz,.noCollision ; return and clear carry if button presses are being simulated
+ ld a,[wd52a] ; the direction that the player is trying to go in
+ ld d,a
+ ld a,[wSpriteStateData1 + 12] ; the player sprite's collision data (bit field) (set in the sprite movement code)
+ and d ; check if a sprite is in the direction the player is trying to go
+ jr nz,.checkIfNextTileIsPassable ; bug?
+ ld hl,TilePairCollisionsWater
+ call CheckForJumpingAndTilePairCollisions
+ jr c,.collision
+ ld a,$35
+ call Predef ; get tile in front of player (puts it in c and [wcfc6])
+ ld a,[wcfc6] ; tile in front of player
+ cp a,$14 ; water tile
+ jr z,.noCollision ; keep surfing if it's a water tile
+ cp a,$32 ; either the left tile of the S.S. Anne boarding platform or the tile on eastern coastlines (depending on the current tileset)
+ jr z,.checkIfVermilionDockTileset
+ cp a,$48 ; tile on right on coast lines in Safari Zone
+ jr z,.noCollision ; keep surfing
+; check if the [land] tile in front of the player is passable
+.checkIfNextTileIsPassable
+ ld hl,W_TILESETCOLLISIONPTR ; pointer to list of passable tiles
+ ld a,[hli]
+ ld h,[hl]
+ ld l,a
+.loop
+ ld a,[hli]
+ cp a,$ff
+ jr z,.collision
+ cp c
+ jr z,.stopSurfing ; stop surfing if the tile is passable
+ jr .loop
+.collision
+ ld a,[wc02a]
+ cp a,(SFX_02_5b - SFX_Headers_02) / 3 ; check if collision sound is already playing
+ jr z,.setCarry
+ ld a,(SFX_02_5b - SFX_Headers_02) / 3
+ call PlaySound ; play collision sound (if it's not already playing)
+.setCarry
+ scf
+ jr .done
+.noCollision
+ and a
+.done
+ ret
+.stopSurfing
+ xor a
+ ld [wd700],a
+ call LoadPlayerSpriteGraphics
+ call Func_2307
+ jr .noCollision
+.checkIfVermilionDockTileset
+ ld a, [W_CURMAPTILESET] ; tileset
+ cp SHIP_PORT ; Vermilion Dock tileset
+ jr nz, .noCollision ; keep surfing if it's not the boarding platform tile
+ jr .stopSurfing ; if it is the boarding platform tile, stop surfing
+
+; function to run the current map's script
+RunMapScript:: ; 101b (0:101b)
+ push hl
+ push de
+ push bc
+ callba Func_f225 ; check if the player is pushing a boulder
+ ld a,[wFlags_0xcd60]
+ bit 1,a ; is the player pushing a boulder?
+ jr z,.afterBoulderEffect
+ callba Func_f2b5 ; displays dust effect when pushing a boulder
+.afterBoulderEffect
+ pop bc
+ pop de
+ pop hl
+ call Func_310e
+ ld a,[W_CURMAP] ; current map number
+ call SwitchToMapRomBank ; change to the ROM bank the map's data is in
+ ld hl,W_MAPSCRIPTPTR
+ ld a,[hli]
+ ld h,[hl]
+ ld l,a
+ ld de,.return
+ push de
+ jp [hl] ; jump to script
+.return
+ ret
+
+LoadWalkingPlayerSpriteGraphics:: ; 104d (0:104d)
+ ld de,RedSprite ; $4180
+ ld hl,vNPCSprites
+ jr LoadPlayerSpriteGraphicsCommon
+
+LoadSurfingPlayerSpriteGraphics:: ; 1055 (0:1055)
+ ld de,SeelSprite
+ ld hl,vNPCSprites
+ jr LoadPlayerSpriteGraphicsCommon
+
+LoadBikePlayerSpriteGraphics:: ; 105d (0:105d)
+ ld de,RedCyclingSprite
+ ld hl,vNPCSprites
+
+LoadPlayerSpriteGraphicsCommon:: ; 1063 (0:1063)
+ push de
+ push hl
+ ld bc,(BANK(RedSprite) << 8) + $0c
+ call CopyVideoData
+ pop hl
+ pop de
+ ld a,$c0
+ add e
+ ld e,a
+ jr nc,.noCarry
+ inc d
+.noCarry
+ set 3,h
+ ld bc,$050c
+ jp CopyVideoData
+
+; function to load data from the map header
+LoadMapHeader:: ; 107c (0:107c)
+ callba Func_f113
+ ld a,[W_CURMAPTILESET]
+ ld [wd119],a
+ ld a,[W_CURMAP]
+ call SwitchToMapRomBank
+ ld a,[W_CURMAPTILESET]
+ ld b,a
+ res 7,a
+ ld [W_CURMAPTILESET],a
+ ld [$ff8b],a
+ bit 7,b
+ ret nz
+ ld hl,MapHeaderPointers
+ ld a,[W_CURMAP]
+ sla a
+ jr nc,.noCarry1
+ inc h
+.noCarry1
+ add l
+ ld l,a
+ jr nc,.noCarry2
+ inc h
+.noCarry2
+ ld a,[hli]
+ ld h,[hl]
+ ld l,a ; hl = base of map header
+; copy the first 10 bytes (the fixed area) of the map data to D367-D370
+ ld de,W_CURMAPTILESET
+ ld c,$0a
+.copyFixedHeaderLoop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec c
+ jr nz,.copyFixedHeaderLoop
+; initialize all the connected maps to disabled at first, before loading the actual values
+ ld a,$ff
+ ld [W_MAPCONN1PTR],a
+ ld [W_MAPCONN2PTR],a
+ ld [W_MAPCONN3PTR],a
+ ld [W_MAPCONN4PTR],a
+; copy connection data (if any) to WRAM
+ ld a,[W_MAPCONNECTIONS]
+ ld b,a
+.checkNorth
+ bit 3,b
+ jr z,.checkSouth
+ ld de,W_MAPCONN1PTR
+ call CopyMapConnectionHeader
+.checkSouth
+ bit 2,b
+ jr z,.checkWest
+ ld de,W_MAPCONN2PTR
+ call CopyMapConnectionHeader
+.checkWest
+ bit 1,b
+ jr z,.checkEast
+ ld de,W_MAPCONN3PTR
+ call CopyMapConnectionHeader
+.checkEast
+ bit 0,b
+ jr z,.getObjectDataPointer
+ ld de,W_MAPCONN4PTR
+ call CopyMapConnectionHeader
+.getObjectDataPointer
+ ld a,[hli]
+ ld [wd3a9],a
+ ld a,[hli]
+ ld [wd3aa],a
+ push hl
+ ld a,[wd3a9]
+ ld l,a
+ ld a,[wd3aa]
+ ld h,a ; hl = base of object data
+ ld de,wd3ad ; background tile ID
+ ld a,[hli]
+ ld [de],a ; save background tile ID
+.loadWarpData
+ ld a,[hli] ; number of warps
+ ld [wd3ae],a ; save the number of warps
+ and a ; are there any warps?
+ jr z,.loadSignData ; if not, skip this
+ ld c,a
+ ld de,wd3af ; base address of warps
+.warpLoop ; one warp per loop iteration
+ ld b,$04
+.warpInnerLoop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec b
+ jr nz,.warpInnerLoop
+ dec c
+ jr nz,.warpLoop
+.loadSignData
+ ld a,[hli] ; number of signs
+ ld [wd4b0],a ; save the number of signs
+ and a ; are there any signs?
+ jr z,.loadSpriteData ; if not, skip this
+ ld c,a
+ ld de,wd4d1 ; base address of sign text IDs
+ ld a,d
+ ld [$ff95],a
+ ld a,e
+ ld [$ff96],a
+ ld de,wd4b1 ; base address of sign coordinates
+.signLoop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ ld a,[hli]
+ ld [de],a
+ inc de
+ push de
+ ld a,[$ff95]
+ ld d,a
+ ld a,[$ff96]
+ ld e,a
+ ld a,[hli]
+ ld [de],a
+ inc de
+ ld a,d
+ ld [$ff95],a
+ ld a,e
+ ld [$ff96],a
+ pop de
+ dec c
+ jr nz,.signLoop
+.loadSpriteData
+ ld a,[wd72e]
+ bit 5,a ; did a battle happen immediately before this?
+ jp nz,.finishUp ; if so, skip this because battles don't destroy this data
+ ld a,[hli]
+ ld [W_NUMSPRITES],a ; save the number of sprites
+ push hl
+; zero C110-C1FF and C210-C2FF
+ ld hl,wSpriteStateData1 + $10
+ ld de,wSpriteStateData2 + $10
+ xor a
+ ld b,$f0
+.zeroSpriteDataLoop
+ ld [hli],a
+ ld [de],a
+ inc e
+ dec b
+ jr nz,.zeroSpriteDataLoop
+; initialize all C100-C1FF sprite entries to disabled (other than player's)
+ ld hl,wSpriteStateData1 + $12
+ ld de,$0010
+ ld c,$0f
+.disableSpriteEntriesLoop
+ ld [hl],$ff
+ add hl,de
+ dec c
+ jr nz,.disableSpriteEntriesLoop
+ pop hl
+ ld de,wSpriteStateData1 + $10
+ ld a,[W_NUMSPRITES] ; number of sprites
+ and a ; are there any sprites?
+ jp z,.finishUp ; if there are no sprites, skip the rest
+ ld b,a
+ ld c,$00
+.loadSpriteLoop
+ ld a,[hli]
+ ld [de],a ; store picture ID at C1X0
+ inc d
+ ld a,$04
+ add e
+ ld e,a
+ ld a,[hli]
+ ld [de],a ; store Y position at C2X4
+ inc e
+ ld a,[hli]
+ ld [de],a ; store X position at C2X5
+ inc e
+ ld a,[hli]
+ ld [de],a ; store movement byte 1 at C2X6
+ ld a,[hli]
+ ld [$ff8d],a ; save movement byte 2
+ ld a,[hli]
+ ld [$ff8e],a ; save text ID and flags byte
+ push bc
+ push hl
+ ld b,$00
+ ld hl,W_MAPSPRITEDATA
+ add hl,bc
+ ld a,[$ff8d]
+ ld [hli],a ; store movement byte 2 in byte 0 of sprite entry
+ ld a,[$ff8e]
+ ld [hl],a ; this appears pointless, since the value is overwritten immediately after
+ ld a,[$ff8e]
+ ld [$ff8d],a
+ and a,$3f
+ ld [hl],a ; store text ID in byte 1 of sprite entry
+ pop hl
+ ld a,[$ff8d]
+ bit 6,a
+ jr nz,.trainerSprite
+ bit 7,a
+ jr nz,.itemBallSprite
+ jr .regularSprite
+.trainerSprite
+ ld a,[hli]
+ ld [$ff8d],a ; save trainer class
+ ld a,[hli]
+ ld [$ff8e],a ; save trainer number (within class)
+ push hl
+ ld hl,W_MAPSPRITEEXTRADATA
+ add hl,bc
+ ld a,[$ff8d]
+ ld [hli],a ; store trainer class in byte 0 of the entry
+ ld a,[$ff8e]
+ ld [hl],a ; store trainer number in byte 1 of the entry
+ pop hl
+ jr .nextSprite
+.itemBallSprite
+ ld a,[hli]
+ ld [$ff8d],a ; save item number
+ push hl
+ ld hl,W_MAPSPRITEEXTRADATA
+ add hl,bc
+ ld a,[$ff8d]
+ ld [hli],a ; store item number in byte 0 of the entry
+ xor a
+ ld [hl],a ; zero byte 1, since it is not used
+ pop hl
+ jr .nextSprite
+.regularSprite
+ push hl
+ ld hl,W_MAPSPRITEEXTRADATA
+ add hl,bc
+; zero both bytes, since regular sprites don't use this extra space
+ xor a
+ ld [hli],a
+ ld [hl],a
+ pop hl
+.nextSprite
+ pop bc
+ dec d
+ ld a,$0a
+ add e
+ ld e,a
+ inc c
+ inc c
+ dec b
+ jp nz,.loadSpriteLoop
+.finishUp
+ ld a,$19
+ call Predef ; load tileset data
+ callab LoadWildData ; load wild pokemon data
+ pop hl ; restore hl from before going to the warp/sign/sprite data (this value was saved for seemingly no purpose)
+ ld a,[W_CURMAPHEIGHT] ; map height in 4x4 tile blocks
+ add a ; double it
+ ld [wd524],a ; store map height in 2x2 tile blocks
+ ld a,[W_CURMAPWIDTH] ; map width in 4x4 tile blocks
+ add a ; double it
+ ld [wd525],a ; map width in 2x2 tile blocks
+ ld a,[W_CURMAP]
+ ld c,a
+ ld b,$00
+ ld a,[H_LOADEDROMBANK]
+ push af
+ ld a, BANK(MapSongBanks)
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a
+ ld hl, MapSongBanks
+ add hl,bc
+ add hl,bc
+ ld a,[hli]
+ ld [wd35b],a ; music 1
+ ld a,[hl]
+ ld [wd35c],a ; music 2
+ pop af
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a
+ ret
+
+; function to copy map connection data from ROM to WRAM
+; Input: hl = source, de = destination
+CopyMapConnectionHeader:: ; 1238 (0:1238)
+ ld c,$0b
+.loop
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec c
+ jr nz,.loop
+ ret
+
+; function to load map data
+LoadMapData:: ; 1241 (0:1241)
+ ld a,[H_LOADEDROMBANK]
+ push af
+ call DisableLCD
+ ld a,$98
+ ld [wd527],a
+ xor a
+ ld [wd526],a
+ ld [$ffaf],a
+ ld [$ffae],a
+ ld [wWalkCounter],a
+ ld [wd119],a
+ ld [wd11a],a
+ ld [W_SPRITESETID],a
+ call LoadTextBoxTilePatterns
+ call LoadMapHeader
+ callba InitMapSprites ; load tile pattern data for sprites
+ call LoadTileBlockMap
+ call LoadTilesetTilePatternData
+ call LoadCurrentMapView
+; copy current map view to VRAM
+ ld hl,wTileMap
+ ld de,vBGMap0
+ ld b,18
+.vramCopyLoop
+ ld c,20
+.vramCopyInnerLoop
+ ld a,[hli]
+ ld [de],a
+ inc e
+ dec c
+ jr nz,.vramCopyInnerLoop
+ ld a,32 - 20
+ add e
+ ld e,a
+ jr nc,.noCarry
+ inc d
+.noCarry
+ dec b
+ jr nz,.vramCopyLoop
+ ld a,$01
+ ld [wcfcb],a
+ call EnableLCD
+ ld b,$09
+ call GoPAL_SET
+ call LoadPlayerSpriteGraphics
+ ld a,[wd732]
+ and a,$18 ; did the player fly or teleport in?
+ jr nz,.restoreRomBank
+ ld a,[W_FLAGS_D733]
+ bit 1,a
+ jr nz,.restoreRomBank
+ call Func_235f ; music related
+ call Func_2312 ; music related
+.restoreRomBank
+ pop af
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a
+ ret
+
+; function to switch to the ROM bank that a map is stored in
+; Input: a = map number
+SwitchToMapRomBank:: ; 12bc (0:12bc)
+ push hl
+ push bc
+ ld c,a
+ ld b,$00
+ ld a,Bank(MapHeaderBanks)
+ call BankswitchHome ; switch to ROM bank 3
+ ld hl,MapHeaderBanks
+ add hl,bc
+ ld a,[hl]
+ ld [$ffe8],a ; save map ROM bank
+ call BankswitchBack
+ ld a,[$ffe8]
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a ; switch to map ROM bank
+ pop bc
+ pop hl
+ ret
+
+Func_12da:: ; 12da (0:12da)
+ ld a, $1e
+ ld [wd13a], a
+ ld hl, wd730
+ ld a, [hl]
+ or $26
+ ld [hl], a
+ ret
+
+Func_12e7:: ; 12e7 (0:12e7)
+ ld hl, wd728
+ res 0, [hl]
+ ret
+
+ForceBikeOrSurf:: ; 12ed (0:12ed)
+ ld b, BANK(RedSprite)
+ ld hl, LoadPlayerSpriteGraphics
+ call Bankswitch
+ jp Func_2307 ; update map/player state?
diff --git a/home/pic.asm b/home/pic.asm
new file mode 100644
index 00000000..6aa2e5c0
--- /dev/null
+++ b/home/pic.asm
@@ -0,0 +1,591 @@
+; bankswitches and runs _UncompressSpriteData
+; bank is given in a, sprite input stream is pointed to in W_SPRITEINPUTPTR
+UncompressSpriteData:: ; 24fd (0:24fd)
+ ld b, a
+ ld a, [H_LOADEDROMBANK]
+ push af
+ ld a, b
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+ ld a, $a
+ ld [$0], a
+ xor a
+ ld [$4000], a
+ call _UncompressSpriteData
+ pop af
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+ ret
+
+; initializes necessary data to load a sprite and runs UncompressSpriteDataLoop
+_UncompressSpriteData:: ; 251a (0:251a)
+ ld hl, S_SPRITEBUFFER1
+ ld c, (2*SPRITEBUFFERSIZE) % $100
+ ld b, (2*SPRITEBUFFERSIZE) / $100
+ xor a
+ call FillMemory ; clear sprite buffer 1 and 2
+ ld a, $1
+ ld [W_SPRITEINPUTBITCOUNTER], a
+ ld a, $3
+ ld [W_SPRITEOUTPUTBITOFFSET], a
+ xor a
+ ld [W_SPRITECURPOSX], a
+ ld [W_SPRITECURPOSY], a
+ ld [W_SPRITELOADFLAGS], a ; wd0a8
+ call ReadNextInputByte ; first byte of input determines sprite width (high nybble) and height (low nybble) in tiles (8x8 pixels)
+ ld b, a
+ and $f
+ add a
+ add a
+ add a
+ ld [W_SPRITEHEIGHT], a
+ ld a, b
+ swap a
+ and $f
+ add a
+ add a
+ add a
+ ld [W_SPRITEWITDH], a
+ call ReadNextInputBit
+ ld [W_SPRITELOADFLAGS], a ; initialite bit1 to 0 and bit0 to the first input bit
+ ; this will load two chunks of data to S_SPRITEBUFFER1 and S_SPRITEBUFFER2
+ ; bit 0 decides in which one the first chunk is placed
+ ; fall through
+
+; uncompresses a chunk from the sprite input data stream (pointed to at wd0da) into S_SPRITEBUFFER1 or S_SPRITEBUFFER2
+; each chunk is a 1bpp sprite. A 2bpp sprite consist of two chunks which are merged afterwards
+; note that this is an endless loop which is terminated during a call to MoveToNextBufferPosition by manipulating the stack
+UncompressSpriteDataLoop:: ; 2556 (0:2556)
+ ld hl, S_SPRITEBUFFER1
+ ld a, [W_SPRITELOADFLAGS] ; wd0a8
+ bit 0, a
+ jr z, .useSpriteBuffer1 ; check which buffer to use
+ ld hl, S_SPRITEBUFFER2
+.useSpriteBuffer1
+ call StoreSpriteOutputPointer
+ ld a, [W_SPRITELOADFLAGS] ; wd0a8
+ bit 1, a
+ jr z, .startDecompression ; check if last iteration
+ call ReadNextInputBit ; if last chunk, read 1-2 bit unpacking mode
+ and a
+ jr z, .unpackingMode0 ; 0 -> mode 0
+ call ReadNextInputBit ; 1 0 -> mode 1
+ inc a ; 1 1 -> mode 2
+.unpackingMode0
+ ld [W_SPRITEUNPACKMODE], a
+.startDecompression
+ call ReadNextInputBit
+ and a
+ jr z, .readRLEncodedZeros ; if first bit is 0, the input starts with zeroes, otherwise with (non-zero) input
+.readNextInput
+ call ReadNextInputBit
+ ld c, a
+ call ReadNextInputBit
+ sla c
+ or c ; read next two bits into c
+ and a
+ jr z, .readRLEncodedZeros ; 00 -> RLEncoded zeroes following
+ call WriteSpriteBitsToBuffer ; otherwise write input to output and repeat
+ call MoveToNextBufferPosition
+ jr .readNextInput
+.readRLEncodedZeros
+ ld c, $0 ; number of zeroes it length encoded, the number
+.countConsecutiveOnesLoop ; of consecutive ones determines the number of bits the number has
+ call ReadNextInputBit
+ and a
+ jr z, .countConsecutiveOnesFinished
+ inc c
+ jr .countConsecutiveOnesLoop
+.countConsecutiveOnesFinished
+ ld a, c
+ add a
+ ld hl, LengthEncodingOffsetList
+ add l
+ ld l, a
+ jr nc, .noCarry
+ inc h
+.noCarry
+ ld a, [hli] ; read offset that is added to the number later on
+ ld e, a ; adding an offset of 2^length - 1 makes every integer uniquely
+ ld d, [hl] ; representable in the length encoding and saves bits
+ push de
+ inc c
+ ld e, $0
+ ld d, e
+.readNumberOfZerosLoop ; reads the next c+1 bits of input
+ call ReadNextInputBit
+ or e
+ ld e, a
+ dec c
+ jr z, .readNumberOfZerosDone
+ sla e
+ rl d
+ jr .readNumberOfZerosLoop
+.readNumberOfZerosDone
+ pop hl ; add the offset
+ add hl, de
+ ld e, l
+ ld d, h
+.writeZerosLoop
+ ld b, e
+ xor a ; write 00 to buffer
+ call WriteSpriteBitsToBuffer
+ ld e, b
+ call MoveToNextBufferPosition
+ dec de
+ ld a, d
+ and a
+ jr nz, .continueLoop
+ ld a, e
+ and a
+.continueLoop
+ jr nz, .writeZerosLoop
+ jr .readNextInput
+
+; moves output pointer to next position
+; also cancels the calling function if the all output is done (by removing the return pointer from stack)
+; and calls postprocessing functions according to the unpack mode
+MoveToNextBufferPosition:: ; 25d8 (0:25d8)
+ ld a, [W_SPRITEHEIGHT]
+ ld b, a
+ ld a, [W_SPRITECURPOSY]
+ inc a
+ cp b
+ jr z, .curColumnDone
+ ld [W_SPRITECURPOSY], a
+ ld a, [W_SPRITEOUTPUTPTR]
+ inc a
+ ld [W_SPRITEOUTPUTPTR], a
+ ret nz
+ ld a, [W_SPRITEOUTPUTPTR+1]
+ inc a
+ ld [W_SPRITEOUTPUTPTR+1], a
+ ret
+.curColumnDone
+ xor a
+ ld [W_SPRITECURPOSY], a
+ ld a, [W_SPRITEOUTPUTBITOFFSET]
+ and a
+ jr z, .bitOffsetsDone
+ dec a
+ ld [W_SPRITEOUTPUTBITOFFSET], a
+ ld hl, W_SPRITEOUTPUTPTRCACHED
+ ld a, [hli]
+ ld [W_SPRITEOUTPUTPTR], a
+ ld a, [hl]
+ ld [W_SPRITEOUTPUTPTR+1], a
+ ret
+.bitOffsetsDone
+ ld a, $3
+ ld [W_SPRITEOUTPUTBITOFFSET], a
+ ld a, [W_SPRITECURPOSX]
+ add $8
+ ld [W_SPRITECURPOSX], a
+ ld b, a
+ ld a, [W_SPRITEWITDH]
+ cp b
+ jr z, .allColumnsDone
+ ld a, [W_SPRITEOUTPUTPTR]
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTR+1]
+ ld h, a
+ inc hl
+ jp StoreSpriteOutputPointer
+.allColumnsDone
+ pop hl
+ xor a
+ ld [W_SPRITECURPOSX], a
+ ld a, [W_SPRITELOADFLAGS] ; wd0a8
+ bit 1, a
+ jr nz, .done ; test if there is one more sprite to go
+ xor $1
+ set 1, a
+ ld [W_SPRITELOADFLAGS], a ; wd0a8
+ jp UncompressSpriteDataLoop
+.done
+ jp UnpackSprite
+
+; writes 2 bits (from a) to the output buffer (pointed to from W_SPRITEOUTPUTPTR)
+WriteSpriteBitsToBuffer:: ; 2649 (0:2649)
+ ld e, a
+ ld a, [W_SPRITEOUTPUTBITOFFSET]
+ and a
+ jr z, .offset0
+ cp $2
+ jr c, .offset1
+ jr z, .offset2
+ rrc e ; offset 3
+ rrc e
+ jr .offset0
+.offset1
+ sla e
+ sla e
+ jr .offset0
+.offset2
+ swap e
+.offset0
+ ld a, [W_SPRITEOUTPUTPTR]
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTR+1]
+ ld h, a
+ ld a, [hl]
+ or e
+ ld [hl], a
+ ret
+
+; reads next bit from input stream and returns it in a
+ReadNextInputBit:: ; 2670 (0:2670)
+ ld a, [W_SPRITEINPUTBITCOUNTER]
+ dec a
+ jr nz, .curByteHasMoreBitsToRead
+ call ReadNextInputByte
+ ld [W_SPRITEINPUTCURBYTE], a
+ ld a, $8
+.curByteHasMoreBitsToRead
+ ld [W_SPRITEINPUTBITCOUNTER], a
+ ld a, [W_SPRITEINPUTCURBYTE]
+ rlca
+ ld [W_SPRITEINPUTCURBYTE], a
+ and $1
+ ret
+
+; reads next byte from input stream and returns it in a
+ReadNextInputByte:: ; 268b (0:268b)
+ ld a, [W_SPRITEINPUTPTR]
+ ld l, a
+ ld a, [W_SPRITEINPUTPTR+1]
+ ld h, a
+ ld a, [hli]
+ ld b, a
+ ld a, l
+ ld [W_SPRITEINPUTPTR], a
+ ld a, h
+ ld [W_SPRITEINPUTPTR+1], a
+ ld a, b
+ ret
+
+; the nth item is 2^n - 1
+LengthEncodingOffsetList:: ; 269f (0:269f)
+ dw %0000000000000001
+ dw %0000000000000011
+ dw %0000000000000111
+ dw %0000000000001111
+ dw %0000000000011111
+ dw %0000000000111111
+ dw %0000000001111111
+ dw %0000000011111111
+ dw %0000000111111111
+ dw %0000001111111111
+ dw %0000011111111111
+ dw %0000111111111111
+ dw %0001111111111111
+ dw %0011111111111111
+ dw %0111111111111111
+ dw %1111111111111111
+
+; unpacks the sprite data depending on the unpack mode
+UnpackSprite:: ; 26bf (0:26bf)
+ ld a, [W_SPRITEUNPACKMODE]
+ cp $2
+ jp z, UnpackSpriteMode2
+ and a
+ jp nz, XorSpriteChunks
+ ld hl, S_SPRITEBUFFER1
+ call SpriteDifferentialDecode
+ ld hl, S_SPRITEBUFFER2
+ ; fall through
+
+; decodes differential encoded sprite data
+; input bit value 0 preserves the current bit value and input bit value 1 toggles it (starting from initial value 0).
+SpriteDifferentialDecode:: ; 26d4 (0:26d4)
+ xor a
+ ld [W_SPRITECURPOSX], a
+ ld [W_SPRITECURPOSY], a
+ call StoreSpriteOutputPointer
+ ld a, [W_SPRITEFLIPPED]
+ and a
+ jr z, .notFlipped
+ ld hl, DecodeNybble0TableFlipped
+ ld de, DecodeNybble1TableFlipped
+ jr .storeDecodeTablesPointers
+.notFlipped
+ ld hl, DecodeNybble0Table
+ ld de, DecodeNybble1Table
+.storeDecodeTablesPointers
+ ld a, l
+ ld [W_SPRITEDECODETABLE0PTR], a
+ ld a, h
+ ld [W_SPRITEDECODETABLE0PTR+1], a
+ ld a, e
+ ld [W_SPRITEDECODETABLE1PTR], a
+ ld a, d
+ ld [W_SPRITEDECODETABLE1PTR+1], a
+ ld e, $0 ; last decoded nybble, initialized to 0
+.decodeNextByteLoop
+ ld a, [W_SPRITEOUTPUTPTR]
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTR+1]
+ ld h, a
+ ld a, [hl]
+ ld b, a
+ swap a
+ and $f
+ call DifferentialDecodeNybble ; decode high nybble
+ swap a
+ ld d, a
+ ld a, b
+ and $f
+ call DifferentialDecodeNybble ; decode low nybble
+ or d
+ ld b, a
+ ld a, [W_SPRITEOUTPUTPTR]
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTR+1]
+ ld h, a
+ ld a, b
+ ld [hl], a ; write back decoded data
+ ld a, [W_SPRITEHEIGHT]
+ add l ; move on to next column
+ jr nc, .noCarry
+ inc h
+.noCarry
+ ld [W_SPRITEOUTPUTPTR], a
+ ld a, h
+ ld [W_SPRITEOUTPUTPTR+1], a
+ ld a, [W_SPRITECURPOSX]
+ add $8
+ ld [W_SPRITECURPOSX], a
+ ld b, a
+ ld a, [W_SPRITEWITDH]
+ cp b
+ jr nz, .decodeNextByteLoop ; test if current row is done
+ xor a
+ ld e, a
+ ld [W_SPRITECURPOSX], a
+ ld a, [W_SPRITECURPOSY] ; move on to next row
+ inc a
+ ld [W_SPRITECURPOSY], a
+ ld b, a
+ ld a, [W_SPRITEHEIGHT]
+ cp b
+ jr z, .done ; test if all rows finished
+ ld a, [W_SPRITEOUTPUTPTRCACHED]
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTRCACHED+1]
+ ld h, a
+ inc hl
+ call StoreSpriteOutputPointer
+ jr .decodeNextByteLoop
+.done
+ xor a
+ ld [W_SPRITECURPOSY], a
+ ret
+
+; decodes the nybble stored in a. Last decoded data is assumed to be in e (needed to determine if initial value is 0 or 1)
+DifferentialDecodeNybble:: ; 276d (0:276d)
+ srl a ; c=a%2, a/=2
+ ld c, $0
+ jr nc, .evenNumber
+ ld c, $1
+.evenNumber
+ ld l, a
+ ld a, [W_SPRITEFLIPPED]
+ and a
+ jr z, .notFlipped ; determine if initial value is 0 or one
+ bit 3, e ; if flipped, consider MSB of last data
+ jr .selectLookupTable
+.notFlipped
+ bit 0, e ; else consider LSB
+.selectLookupTable
+ ld e, l
+ jr nz, .initialValue1 ; load the appropriate table
+ ld a, [W_SPRITEDECODETABLE0PTR]
+ ld l, a
+ ld a, [W_SPRITEDECODETABLE0PTR+1]
+ jr .tableLookup
+.initialValue1
+ ld a, [W_SPRITEDECODETABLE1PTR]
+ ld l, a
+ ld a, [W_SPRITEDECODETABLE1PTR+1]
+.tableLookup
+ ld h, a
+ ld a, e
+ add l
+ ld l, a
+ jr nc, .noCarry
+ inc h
+.noCarry
+ ld a, [hl]
+ bit 0, c
+ jr nz, .selectLowNybble
+ swap a ; select high nybble
+.selectLowNybble
+ and $f
+ ld e, a ; update last decoded data
+ ret
+
+DecodeNybble0Table:: ; 27a7 (0:27a7)
+ dn $0, $1
+ dn $3, $2
+ dn $7, $6
+ dn $4, $5
+ dn $f, $e
+ dn $c, $d
+ dn $8, $9
+ dn $b, $a
+DecodeNybble1Table:: ; 27af (0:27af)
+ dn $f, $e
+ dn $c, $d
+ dn $8, $9
+ dn $b, $a
+ dn $0, $1
+ dn $3, $2
+ dn $7, $6
+ dn $4, $5
+DecodeNybble0TableFlipped:: ; 27b7 (0:27b7)
+ dn $0, $8
+ dn $c, $4
+ dn $e, $6
+ dn $2, $a
+ dn $f, $7
+ dn $3, $b
+ dn $1, $9
+ dn $d, $5
+DecodeNybble1TableFlipped:: ; 27bf (0:27bf)
+ dn $f, $7
+ dn $3, $b
+ dn $1, $9
+ dn $d, $5
+ dn $0, $8
+ dn $c, $4
+ dn $e, $6
+ dn $2, $a
+
+; combines the two loaded chunks with xor (the chunk loaded second is the destination). The source chunk is differeintial decoded beforehand.
+XorSpriteChunks:: ; 27c7 (0:27c7)
+ xor a
+ ld [W_SPRITECURPOSX], a
+ ld [W_SPRITECURPOSY], a
+ call ResetSpriteBufferPointers
+ ld a, [W_SPRITEOUTPUTPTR] ; points to buffer 1 or 2, depending on flags
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTR+1]
+ ld h, a
+ call SpriteDifferentialDecode ; decode buffer 1 or 2, depending on flags
+ call ResetSpriteBufferPointers
+ ld a, [W_SPRITEOUTPUTPTR] ; source buffer, points to buffer 1 or 2, depending on flags
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTR+1]
+ ld h, a
+ ld a, [W_SPRITEOUTPUTPTRCACHED] ; destination buffer, points to buffer 2 or 1, depending on flags
+ ld e, a
+ ld a, [W_SPRITEOUTPUTPTRCACHED+1]
+ ld d, a
+.xorChunksLoop
+ ld a, [W_SPRITEFLIPPED]
+ and a
+ jr z, .notFlipped
+ push de
+ ld a, [de]
+ ld b, a
+ swap a
+ and $f
+ call ReverseNybble ; if flipped reverse the nybbles in the destination buffer
+ swap a
+ ld c, a
+ ld a, b
+ and $f
+ call ReverseNybble
+ or c
+ pop de
+ ld [de], a
+.notFlipped
+ ld a, [hli]
+ ld b, a
+ ld a, [de]
+ xor b
+ ld [de], a
+ inc de
+ ld a, [W_SPRITECURPOSY]
+ inc a
+ ld [W_SPRITECURPOSY], a ; go to next row
+ ld b, a
+ ld a, [W_SPRITEHEIGHT]
+ cp b
+ jr nz, .xorChunksLoop ; test if column finished
+ xor a
+ ld [W_SPRITECURPOSY], a
+ ld a, [W_SPRITECURPOSX]
+ add $8
+ ld [W_SPRITECURPOSX], a ; go to next column
+ ld b, a
+ ld a, [W_SPRITEWITDH]
+ cp b
+ jr nz, .xorChunksLoop ; test if all columns finished
+ xor a
+ ld [W_SPRITECURPOSX], a
+ ret
+
+; reverses the bits in the nybble given in register a
+ReverseNybble:: ; 2837 (0:2837)
+ ld de, NybbleReverseTable
+ add e
+ ld e, a
+ jr nc, .asm_283f
+ inc d
+.asm_283f
+ ld a, [de]
+ ret
+
+; resets sprite buffer pointers to buffer 1 and 2, depending on W_SPRITELOADFLAGS
+ResetSpriteBufferPointers:: ; 2841 (0:2841)
+ ld a, [W_SPRITELOADFLAGS] ; wd0a8
+ bit 0, a
+ jr nz, .buffer2Selected
+ ld de, S_SPRITEBUFFER1
+ ld hl, S_SPRITEBUFFER2
+ jr .storeBufferPointers
+.buffer2Selected
+ ld de, S_SPRITEBUFFER2
+ ld hl, S_SPRITEBUFFER1
+.storeBufferPointers
+ ld a, l
+ ld [W_SPRITEOUTPUTPTR], a
+ ld a, h
+ ld [W_SPRITEOUTPUTPTR+1], a
+ ld a, e
+ ld [W_SPRITEOUTPUTPTRCACHED], a
+ ld a, d
+ ld [W_SPRITEOUTPUTPTRCACHED+1], a
+ ret
+
+; maps each nybble to its reverse
+NybbleReverseTable:: ; 2867 (0:2867)
+ db $0, $8, $4, $c, $2, $a, $6 ,$e, $1, $9, $5, $d, $3, $b, $7 ,$f
+
+; combines the two loaded chunks with xor (the chunk loaded second is the destination). Both chunks are differeintial decoded beforehand.
+UnpackSpriteMode2:: ; 2877 (0:2877)
+ call ResetSpriteBufferPointers
+ ld a, [W_SPRITEFLIPPED]
+ push af
+ xor a
+ ld [W_SPRITEFLIPPED], a ; temporarily clear flipped flag for decoding the destination chunk
+ ld a, [W_SPRITEOUTPUTPTRCACHED]
+ ld l, a
+ ld a, [W_SPRITEOUTPUTPTRCACHED+1]
+ ld h, a
+ call SpriteDifferentialDecode
+ call ResetSpriteBufferPointers
+ pop af
+ ld [W_SPRITEFLIPPED], a
+ jp XorSpriteChunks
+
+; stores hl into the output pointers
+StoreSpriteOutputPointer:: ; 2897 (0:2897)
+ ld a, l
+ ld [W_SPRITEOUTPUTPTR], a
+ ld [W_SPRITEOUTPUTPTRCACHED], a
+ ld a, h
+ ld [W_SPRITEOUTPUTPTR+1], a
+ ld [W_SPRITEOUTPUTPTRCACHED+1], a
+ ret
diff --git a/home/predef.asm b/home/predef.asm
new file mode 100644
index 00000000..1777d09f
--- /dev/null
+++ b/home/predef.asm
@@ -0,0 +1,50 @@
+Predef::
+; Call predefined function a.
+; To preserve other registers, have the
+; destination call GetPredefRegisters.
+
+ ; Save the predef id for GetPredefPointer.
+ ld [wPredefID], a
+
+ ; A hack for LoadDestinationWarpPosition.
+ ; See Func_c754 (predef $19).
+ ld a, [H_LOADEDROMBANK]
+ ld [wPredefParentBank], a
+
+ push af
+ ld a, BANK(GetPredefPointer)
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+
+ call GetPredefPointer
+
+ ld a, [wPredefBank]
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+
+ ld de, .done
+ push de
+ jp [hl]
+.done
+
+ pop af
+ ld [H_LOADEDROMBANK], a
+ ld [$2000], a
+ ret
+
+GetPredefRegisters::
+; Restore the contents of register pairs
+; when GetPredefPointer was called.
+ ld a, [wPredefRegisters + 0]
+ ld h, a
+ ld a, [wPredefRegisters + 1]
+ ld l, a
+ ld a, [wPredefRegisters + 2]
+ ld d, a
+ ld a, [wPredefRegisters + 3]
+ ld e, a
+ ld a, [wPredefRegisters + 4]
+ ld b, a
+ ld a, [wPredefRegisters + 5]
+ ld c, a
+ ret
diff --git a/home/text.asm b/home/text.asm
new file mode 100644
index 00000000..7d8ea61b
--- /dev/null
+++ b/home/text.asm
@@ -0,0 +1,738 @@
+TextBoxBorder::
+; Draw a cxb text box at hl.
+
+ ; top row
+ push hl
+ ld a, "┌"
+ ld [hli], a
+ inc a ; ─
+ call NPlaceChar
+ inc a ; ┐
+ ld [hl], a
+ pop hl
+
+ ld de, 20
+ add hl, de
+
+ ; middle rows
+.next
+ push hl
+ ld a, "│"
+ ld [hli],a
+ ld a, " "
+ call NPlaceChar
+ ld [hl], "│"
+ pop hl
+
+ ld de, 20
+ add hl, de
+ dec b
+ jr nz, .next
+
+ ; bottom row
+ ld a, "└"
+ ld [hli], a
+ ld a, "─"
+ call NPlaceChar
+ ld [hl], "┘"
+ ret
+
+NPlaceChar::
+; Place char a c times.
+ ld d, c
+.loop
+ ld [hli], a
+ dec d
+ jr nz, .loop
+ ret
+
+PlaceString:: ; 1955 (0:1955)
+ push hl
+PlaceNextChar:: ; 1956 (0:1956)
+ ld a,[de]
+
+ cp "@"
+ jr nz,.PlaceText
+ ld b,h
+ ld c,l
+ pop hl
+ ret
+
+.PlaceText
+ cp $4E
+ jr nz,.next
+ ld bc,$0028
+ ld a,[$FFF6]
+ bit 2,a
+ jr z,.next2
+ ld bc,$14
+.next2
+ pop hl
+ add hl,bc
+ push hl
+ jp Next19E8
+
+.next
+ cp $4F
+ jr nz,.next3
+ pop hl
+ FuncCoord 1, 16
+ ld hl,Coord
+ push hl
+ jp Next19E8
+
+.next3 ; Check against a dictionary
+ and a
+ jp z,Char00
+ cp $4C
+ jp z,Char4C
+ cp $4B
+ jp z,Char4B
+ cp $51
+ jp z,Char51
+ cp $49
+ jp z,Char49
+ cp $52
+ jp z,Char52
+ cp $53
+ jp z,Char53
+ cp $54
+ jp z,Char54
+ cp $5B
+ jp z,Char5B
+ cp $5E
+ jp z,Char5E
+ cp $5C
+ jp z,Char5C
+ cp $5D
+ jp z,Char5D
+ cp $55
+ jp z,Char55
+ cp $56
+ jp z,Char56
+ cp $57
+ jp z,Char57
+ cp $58
+ jp z,Char58
+ cp $4A
+ jp z,Char4A
+ cp $5F
+ jp z,Char5F
+ cp $59
+ jp z,Char59
+ cp $5A
+ jp z,Char5A
+ ld [hli],a
+ call PrintLetterDelay
+Next19E8:: ; 19e8 (0:19e8)
+ inc de
+ jp PlaceNextChar
+
+Char00:: ; 19ec (0:19ec)
+ ld b,h
+ ld c,l
+ pop hl
+ ld de,Char00Text
+ dec de
+ ret
+
+Char00Text:: ; 0x19f4 “%d ERROR.”
+ TX_FAR _Char00Text
+ db "@"
+
+Char52:: ; 0x19f9 player’s name
+ push de
+ ld de,W_PLAYERNAME
+ jr FinishDTE
+
+Char53:: ; 19ff (0:19ff) ; rival’s name
+ push de
+ ld de,W_RIVALNAME
+ jr FinishDTE
+
+Char5D:: ; 1a05 (0:1a05) ; TRAINER
+ push de
+ ld de,Char5DText
+ jr FinishDTE
+
+Char5C:: ; 1a0b (0:1a0b) ; TM
+ push de
+ ld de,Char5CText
+ jr FinishDTE
+
+Char5B:: ; 1a11 (0:1a11) ; PC
+ push de
+ ld de,Char5BText
+ jr FinishDTE
+
+Char5E:: ; 1a17 (0:1a17) ; ROCKET
+ push de
+ ld de,Char5EText
+ jr FinishDTE
+
+Char54:: ; 1a1d (0:1a1d) ; POKé
+ push de
+ ld de,Char54Text
+ jr FinishDTE
+
+Char56:: ; 1a23 (0:1a23) ; ……
+ push de
+ ld de,Char56Text
+ jr FinishDTE
+
+Char4A:: ; 1a29 (0:1a29) ; PKMN
+ push de
+ ld de,Char4AText
+ jr FinishDTE
+
+Char59:: ; 1a2f (0:1a2f)
+; depending on whose turn it is, print
+; enemy active monster’s name, prefixed with “Enemy ”
+; or
+; player active monster’s name
+; (like Char5A but flipped)
+ ld a,[H_WHOSETURN]
+ xor 1
+ jr MonsterNameCharsCommon
+
+Char5A:: ; 1a35 (0:1a35)
+; depending on whose turn it is, print
+; player active monster’s name
+; or
+; enemy active monster’s name, prefixed with “Enemy ”
+ ld a,[H_WHOSETURN]
+MonsterNameCharsCommon:: ; 1a37 (0:1a37)
+ push de
+ and a
+ jr nz,.Enemy
+ ld de,W_PLAYERMONNAME ; player active monster name
+ jr FinishDTE
+
+.Enemy ; 1A40
+ ; print “Enemy ”
+ ld de,Char5AText
+ call PlaceString
+
+ ld h,b
+ ld l,c
+ ld de,W_ENEMYMONNAME ; enemy active monster name
+
+FinishDTE:: ; 1a4b (0:1a4b)
+ call PlaceString
+ ld h,b
+ ld l,c
+ pop de
+ inc de
+ jp PlaceNextChar
+
+Char5CText:: ; 1a55 (0:1a55)
+ db "TM@"
+Char5DText:: ; 1a58 (0:1a58)
+ db "TRAINER@"
+Char5BText:: ; 1a60 (0:1a60)
+ db "PC@"
+Char5EText:: ; 1a63 (0:1a63)
+ db "ROCKET@"
+Char54Text:: ; 1a6a (0:1a6a)
+ db "POKé@"
+Char56Text:: ; 1a6f (0:1a6f)
+ db "……@"
+Char5AText:: ; 1a72 (0:1a72)
+ db "Enemy @"
+Char4AText:: ; 1a79 (0:1a79)
+ db $E1,$E2,"@" ; PKMN
+
+Char55:: ; 1a7c (0:1a7c)
+ push de
+ ld b,h
+ ld c,l
+ ld hl,Char55Text
+ call TextCommandProcessor
+ ld h,b
+ ld l,c
+ pop de
+ inc de
+ jp PlaceNextChar
+
+Char55Text:: ; 1a8c (0:1a8c)
+; equivalent to Char4B
+ TX_FAR _Char55Text
+ db "@"
+
+Char5F:: ; 1a91 (0:1a91)
+; ends a Pokédex entry
+ ld [hl],"."
+ pop hl
+ ret
+
+Char58:: ; 1a95 (0:1a95)
+ ld a,[W_ISLINKBATTLE]
+ cp 4
+ jp z,Next1AA2
+ ld a,$EE
+ FuncCoord 18, 16
+ ld [Coord],a
+Next1AA2:: ; 1aa2 (0:1aa2)
+ call ProtectedDelay3
+ call ManualTextScroll
+ ld a,$7F
+ FuncCoord 18, 16
+ ld [Coord],a
+Char57:: ; 1aad (0:1aad)
+ pop hl
+ ld de,Char58Text
+ dec de
+ ret
+
+Char58Text:: ; 1ab3 (0:1ab3)
+ db "@"
+
+Char51:: ; 1ab4 (0:1ab4)
+ push de
+ ld a,$EE
+ FuncCoord 18, 16
+ ld [Coord],a
+ call ProtectedDelay3
+ call ManualTextScroll
+ FuncCoord 1, 13
+ ld hl,Coord
+ ld bc,$0412
+ call ClearScreenArea
+ ld c,$14
+ call DelayFrames
+ pop de
+ FuncCoord 1, 14
+ ld hl,Coord
+ jp Next19E8
+
+Char49:: ; 1ad5 (0:1ad5)
+ push de
+ ld a,$EE
+ FuncCoord 18, 16
+ ld [Coord],a
+ call ProtectedDelay3
+ call ManualTextScroll
+ FuncCoord 1, 10
+ ld hl,Coord
+ ld bc,$0712
+ call ClearScreenArea
+ ld c,$14
+ call DelayFrames
+ pop de
+ pop hl
+ FuncCoord 1, 11
+ ld hl,Coord
+ push hl
+ jp Next19E8
+
+Char4B:: ; 1af8 (0:1af8)
+ ld a,$EE
+ FuncCoord 18, 16
+ ld [Coord],a
+ call ProtectedDelay3
+ push de
+ call ManualTextScroll
+ pop de
+ ld a,$7F
+ FuncCoord 18, 16
+ ld [Coord],a
+ ;fall through
+Char4C:: ; 1b0a (0:1b0a)
+ push de
+ call Next1B18
+ call Next1B18
+ FuncCoord 1, 16
+ ld hl,Coord
+ pop de
+ jp Next19E8
+
+Next1B18:: ; 1b18 (0:1b18)
+ FuncCoord 0, 14
+ ld hl,Coord
+ FuncCoord 0, 13
+ ld de,Coord
+ ld b,$3C
+.next
+ ld a,[hli]
+ ld [de],a
+ inc de
+ dec b
+ jr nz,.next
+ FuncCoord 1, 16
+ ld hl,Coord
+ ld a,$7F
+ ld b,$12
+.next2
+ ld [hli],a
+ dec b
+ jr nz,.next2
+
+ ; wait five frames
+ ld b,5
+.WaitFrame
+ call DelayFrame
+ dec b
+ jr nz,.WaitFrame
+
+ ret
+
+ProtectedDelay3:: ; 1b3a (0:1b3a)
+ push bc
+ call Delay3
+ pop bc
+ ret
+
+TextCommandProcessor:: ; 1b40 (0:1b40)
+ ld a,[wd358]
+ push af
+ set 1,a
+ ld e,a
+ ld a,[$fff4]
+ xor e
+ ld [wd358],a
+ ld a,c
+ ld [wcc3a],a
+ ld a,b
+ ld [wcc3b],a
+
+NextTextCommand:: ; 1b55 (0:1b55)
+ ld a,[hli]
+ cp a, "@" ; terminator
+ jr nz,.doTextCommand
+ pop af
+ ld [wd358],a
+ ret
+.doTextCommand
+ push hl
+ cp a,$17
+ jp z,TextCommand17
+ cp a,$0e
+ jp nc,TextCommand0B ; if a != 0x17 and a >= 0xE, go to command 0xB
+; if a < 0xE, use a jump table
+ ld hl,TextCommandJumpTable
+ push bc
+ add a
+ ld b,$00
+ ld c,a
+ add hl,bc
+ pop bc
+ ld a,[hli]
+ ld h,[hl]
+ ld l,a
+ jp [hl]
+
+; draw box
+; 04AAAABBCC
+; AAAA = address of upper left corner
+; BB = height
+; CC = width
+TextCommand04:: ; 1b78 (0:1b78)
+ pop hl
+ ld a,[hli]
+ ld e,a
+ ld a,[hli]
+ ld d,a
+ ld a,[hli]
+ ld b,a
+ ld a,[hli]
+ ld c,a
+ push hl
+ ld h,d
+ ld l,e
+ call TextBoxBorder
+ pop hl
+ jr NextTextCommand
+
+; place string inline
+; 00{string}
+TextCommand00:: ; 1b8a (0:1b8a)
+ pop hl
+ ld d,h
+ ld e,l
+ ld h,b
+ ld l,c
+ call PlaceString
+ ld h,d
+ ld l,e
+ inc hl
+ jr NextTextCommand
+
+; place string from RAM
+; 01AAAA
+; AAAA = address of string
+TextCommand01:: ; 1b97 (0:1b97)
+ pop hl
+ ld a,[hli]
+ ld e,a
+ ld a,[hli]
+ ld d,a
+ push hl
+ ld h,b
+ ld l,c
+ call PlaceString
+ pop hl
+ jr NextTextCommand
+
+; print BCD number
+; 02AAAABB
+; AAAA = address of BCD number
+; BB
+; bits 0-4 = length in bytes
+; bits 5-7 = unknown flags
+TextCommand02:: ; 1ba5 (0:1ba5)
+ pop hl
+ ld a,[hli]
+ ld e,a
+ ld a,[hli]
+ ld d,a
+ ld a,[hli]
+ push hl
+ ld h,b
+ ld l,c
+ ld c,a
+ call PrintBCDNumber
+ ld b,h
+ ld c,l
+ pop hl
+ jr NextTextCommand
+
+; repoint destination address
+; 03AAAA
+; AAAA = new destination address
+TextCommand03:: ; 1bb7 (0:1bb7)
+ pop hl
+ ld a,[hli]
+ ld [wcc3a],a
+ ld c,a
+ ld a,[hli]
+ ld [wcc3b],a
+ ld b,a
+ jp NextTextCommand
+
+; repoint destination to second line of dialogue text box
+; 05
+; (no arguments)
+TextCommand05:: ; 1bc5 (0:1bc5)
+ pop hl
+ FuncCoord 1, 16
+ ld bc,Coord ; address of second line of dialogue text box
+ jp NextTextCommand
+
+; blink arrow and wait for A or B to be pressed
+; 06
+; (no arguments)
+TextCommand06:: ; 1bcc (0:1bcc)
+ ld a,[W_ISLINKBATTLE]
+ cp a,$04
+ jp z,TextCommand0D
+ ld a,$ee ; down arrow
+ FuncCoord 18, 16
+ ld [Coord],a ; place down arrow in lower right corner of dialogue text box
+ push bc
+ call ManualTextScroll ; blink arrow and wait for A or B to be pressed
+ pop bc
+ ld a," "
+ FuncCoord 18, 16
+ ld [Coord],a ; overwrite down arrow with blank space
+ pop hl
+ jp NextTextCommand
+
+; scroll text up one line
+; 07
+; (no arguments)
+TextCommand07:: ; 1be7 (0:1be7)
+ ld a," "
+ FuncCoord 18, 16
+ ld [Coord],a ; place blank space in lower right corner of dialogue text box
+ call Next1B18 ; scroll up text
+ call Next1B18
+ pop hl
+ FuncCoord 1, 16
+ ld bc,Coord ; address of second line of dialogue text box
+ jp NextTextCommand
+
+; execute asm inline
+; 08{code}
+TextCommand08:: ; 1bf9 (0:1bf9)
+ pop hl
+ ld de,NextTextCommand
+ push de ; return address
+ jp [hl]
+
+; print decimal number (converted from binary number)
+; 09AAAABB
+; AAAA = address of number
+; BB
+; bits 0-3 = how many digits to display
+; bits 4-7 = how long the number is in bytes
+TextCommand09:: ; 1bff (0:1bff)
+ pop hl
+ ld a,[hli]
+ ld e,a
+ ld a,[hli]
+ ld d,a
+ ld a,[hli]
+ push hl
+ ld h,b
+ ld l,c
+ ld b,a
+ and a,$0f
+ ld c,a
+ ld a,b
+ and a,$f0
+ swap a
+ set 6,a
+ ld b,a
+ call PrintNumber
+ ld b,h
+ ld c,l
+ pop hl
+ jp NextTextCommand
+
+; wait half a second if the user doesn't hold A or B
+; 0A
+; (no arguments)
+TextCommand0A:: ; 1c1d (0:1c1d)
+ push bc
+ call Joypad
+ ld a,[hJoyHeld]
+ and a,%00000011 ; A and B buttons
+ jr nz,.skipDelay
+ ld c,30
+ call DelayFrames
+.skipDelay
+ pop bc
+ pop hl
+ jp NextTextCommand
+
+; plays sounds
+; this actually handles various command ID's, not just 0B
+; (no arguments)
+TextCommand0B:: ; 1c31 (0:1c31)
+ pop hl
+ push bc
+ dec hl
+ ld a,[hli]
+ ld b,a ; b = command number that got us here
+ push hl
+ ld hl,TextCommandSounds
+.loop
+ ld a,[hli]
+ cp b
+ jr z,.matchFound
+ inc hl
+ jr .loop
+.matchFound
+ cp a,$14
+ jr z,.pokemonCry
+ cp a,$15
+ jr z,.pokemonCry
+ cp a,$16
+ jr z,.pokemonCry
+ ld a,[hl]
+ call PlaySound
+ call WaitForSoundToFinish
+ pop hl
+ pop bc
+ jp NextTextCommand
+.pokemonCry
+ push de
+ ld a,[hl]
+ call PlayCry
+ pop de
+ pop hl
+ pop bc
+ jp NextTextCommand
+
+; format: text command ID, sound ID or cry ID
+TextCommandSounds:: ; 1c64 (0:1c64)
+ db $0B,(SFX_02_3a - SFX_Headers_02) / 3
+ db $12,(SFX_02_46 - SFX_Headers_02) / 3
+ db $0E,(SFX_02_41 - SFX_Headers_02) / 3
+ db $0F,(SFX_02_3a - SFX_Headers_02) / 3
+ db $10,(SFX_02_3b - SFX_Headers_02) / 3
+ db $11,(SFX_02_42 - SFX_Headers_02) / 3
+ db $13,(SFX_02_44 - SFX_Headers_02) / 3
+ db $14,NIDORINA ; used in OakSpeech
+ db $15,PIDGEOT ; used in SaffronCityText12
+ db $16,DEWGONG ; unused?
+
+; draw ellipses
+; 0CAA
+; AA = number of ellipses to draw
+TextCommand0C:: ; 1c78 (0:1c78)
+ pop hl
+ ld a,[hli]
+ ld d,a
+ push hl
+ ld h,b
+ ld l,c
+.loop
+ ld a,$75 ; ellipsis
+ ld [hli],a
+ push de
+ call Joypad
+ pop de
+ ld a,[hJoyHeld] ; joypad state
+ and a,%00000011 ; is A or B button pressed?
+ jr nz,.skipDelay ; if so, skip the delay
+ ld c,10
+ call DelayFrames
+.skipDelay
+ dec d
+ jr nz,.loop
+ ld b,h
+ ld c,l
+ pop hl
+ jp NextTextCommand
+
+; wait for A or B to be pressed
+; 0D
+; (no arguments)
+TextCommand0D:: ; 1c9a (0:1c9a)
+ push bc
+ call ManualTextScroll ; wait for A or B to be pressed
+ pop bc
+ pop hl
+ jp NextTextCommand
+
+; process text commands in another ROM bank
+; 17AAAABB
+; AAAA = address of text commands
+; BB = bank
+TextCommand17:: ; 1ca3 (0:1ca3)
+ pop hl
+ ld a,[H_LOADEDROMBANK]
+ push af
+ ld a,[hli]
+ ld e,a
+ ld a,[hli]
+ ld d,a
+ ld a,[hli]
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a
+ push hl
+ ld l,e
+ ld h,d
+ call TextCommandProcessor
+ pop hl
+ pop af
+ ld [H_LOADEDROMBANK],a
+ ld [$2000],a
+ jp NextTextCommand
+
+TextCommandJumpTable:: ; 1cc1 (0:1cc1)
+ dw TextCommand00
+ dw TextCommand01
+ dw TextCommand02
+ dw TextCommand03
+ dw TextCommand04
+ dw TextCommand05
+ dw TextCommand06
+ dw TextCommand07
+ dw TextCommand08
+ dw TextCommand09
+ dw TextCommand0A
+ dw TextCommand0B
+ dw TextCommand0C
+ dw TextCommand0D
diff --git a/home/vblank.asm b/home/vblank.asm
new file mode 100644
index 00000000..ec82eb7d
--- /dev/null
+++ b/home/vblank.asm
@@ -0,0 +1,105 @@
+VBlank::
+
+ push af
+ push bc
+ push de
+ push hl
+
+ ld a, [H_LOADEDROMBANK]
+ ld [wd122], a
+
+ ld a, [$ffae]
+ ld [rSCX], a
+ ld a, [$ffaf]
+ ld [rSCY], a
+
+ ld a, [wd0a0]
+ and a
+ jr nz, .ok
+ ld a, [$ffb0]
+ ld [rWY], a
+.ok
+
+ call AutoBgMapTransfer
+ call VBlankCopyBgMap
+ call RedrawExposedScreenEdge
+ call VBlankCopy
+ call VBlankCopyDouble
+ call UpdateMovingBgTiles
+ call $ff80 ; hOAMDMA
+ ld a, Bank(PrepareOAMData)
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
+ call PrepareOAMData
+
+ ; VBlank-sensitive operations end.
+
+ call Random
+
+ ld a, [H_VBLANKOCCURRED]
+ and a
+ jr z, .vblanked
+ xor a
+ ld [H_VBLANKOCCURRED], a
+.vblanked
+
+ ld a, [H_FRAMECOUNTER]
+ and a
+ jr z, .decced
+ dec a
+ ld [H_FRAMECOUNTER], a
+.decced
+
+ call Func_28cb
+
+ ld a, [wc0ef] ; music ROM bank
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
+
+ cp BANK(Func_9103)
+ jr nz, .notbank2
+.bank2
+ call Func_9103
+ jr .afterMusic
+.notbank2
+ cp 8
+ jr nz, .bank1F
+.bank8
+ call Func_2136e
+ call Func_21879
+ jr .afterMusic
+.bank1F
+ call Func_7d177
+.afterMusic
+
+ callba Func_18dee ; keep track of time played
+
+ ld a, [$fff9]
+ and a
+ call z, ReadJoypad
+
+ ld a, [wd122]
+ ld [H_LOADEDROMBANK], a
+ ld [MBC3RomBank], a
+
+ pop hl
+ pop de
+ pop bc
+ pop af
+ reti
+
+
+DelayFrame::
+; Wait for the next vblank interrupt.
+; As a bonus, this saves battery.
+
+NOT_VBLANKED EQU 1
+
+ ld a, NOT_VBLANKED
+ ld [H_VBLANKOCCURRED], a
+.halt
+ halt
+ ld a, [H_VBLANKOCCURRED]
+ and a
+ jr nz, .halt
+ ret
diff --git a/home/vcopy.asm b/home/vcopy.asm
new file mode 100644
index 00000000..9f152841
--- /dev/null
+++ b/home/vcopy.asm
@@ -0,0 +1,450 @@
+; this function seems to be used only once
+; it store the address of a row and column of the VRAM background map in hl
+; INPUT: h - row, l - column, b - high byte of background tile map address in VRAM
+GetRowColAddressBgMap:: ; 1cdd (0:1cdd)
+ xor a
+ srl h
+ rr a
+ srl h
+ rr a
+ srl h
+ rr a
+ or l
+ ld l,a
+ ld a,b
+ or h
+ ld h,a
+ ret
+
+; clears a VRAM background map with blank space tiles
+; INPUT: h - high byte of background tile map address in VRAM
+ClearBgMap:: ; 1cf0 (0:1cf0)
+ ld a," "
+ jr .next
+ ld a,l
+.next
+ ld de,$400 ; size of VRAM background map
+ ld l,e
+.loop
+ ld [hli],a
+ dec e
+ jr nz,.loop
+ dec d
+ jr nz,.loop
+ ret
+
+; When the player takes a step, a row or column of 2x2 tile blocks at the edge
+; of the screen toward which they moved is exposed and has to be redrawn.
+; This function does the redrawing.
+RedrawExposedScreenEdge:: ; 1d01 (0:1d01)
+ ld a,[H_SCREENEDGEREDRAW]
+ and a
+ ret z
+ ld b,a
+ xor a
+ ld [H_SCREENEDGEREDRAW],a
+ dec b
+ jr nz,.redrawRow
+.redrawColumn
+ ld hl,wScreenEdgeTiles
+ ld a,[H_SCREENEDGEREDRAWADDR]
+ ld e,a
+ ld a,[H_SCREENEDGEREDRAWADDR + 1]
+ ld d,a
+ ld c,18 ; screen height
+.loop1
+ ld a,[hli]
+ ld [de],a
+ inc de
+ ld a,[hli]
+ ld [de],a
+ ld a,31
+ add e
+ ld e,a
+ jr nc,.noCarry
+ inc d
+.noCarry
+; the following 4 lines wrap us from bottom to top if necessary
+ ld a,d
+ and a,$03
+ or a,$98
+ ld d,a
+ dec c
+ jr nz,.loop1
+ xor a
+ ld [H_SCREENEDGEREDRAW],a
+ ret
+.redrawRow
+ ld hl,wScreenEdgeTiles
+ ld a,[H_SCREENEDGEREDRAWADDR]
+ ld e,a
+ ld a,[H_SCREENEDGEREDRAWADDR + 1]
+ ld d,a
+ push de
+ call .drawHalf ; draw upper half
+ pop de
+ ld a,32 ; width of VRAM background map
+ add e
+ ld e,a
+ ; draw lower half
+.drawHalf
+ ld c,10
+.loop2
+ ld a,[hli]
+ ld [de],a
+ inc de
+ ld a,[hli]
+ ld [de],a
+ ld a,e
+ inc a
+; the following 6 lines wrap us from the right edge to the left edge if necessary
+ and a,$1f
+ ld b,a
+ ld a,e
+ and a,$e0
+ or b
+ ld e,a
+ dec c
+ jr nz,.loop2
+ ret
+
+; This function automatically transfers tile number data from the tile map at
+; wTileMap to VRAM during V-blank. Note that it only transfers one third of the
+; background per V-blank. It cycles through which third it draws.
+; This transfer is turned off when walking around the map, but is turned
+; on when talking to sprites, battling, using menus, etc. This is because
+; the above function, RedrawExposedScreenEdge, is used when walking to
+; improve efficiency.
+AutoBgMapTransfer:: ; 1d57 (0:1d57)
+ ld a,[H_AUTOBGTRANSFERENABLED]
+ and a
+ ret z
+ ld hl,[sp + 0]
+ ld a,h
+ ld [H_SPTEMP],a
+ ld a,l
+ ld [H_SPTEMP + 1],a ; save stack pinter
+ ld a,[H_AUTOBGTRANSFERPORTION]
+ and a
+ jr z,.transferTopThird
+ dec a
+ jr z,.transferMiddleThird
+.transferBottomThird
+ FuncCoord 0,12
+ ld hl,Coord
+ ld sp,hl
+ ld a,[H_AUTOBGTRANSFERDEST + 1]
+ ld h,a
+ ld a,[H_AUTOBGTRANSFERDEST]
+ ld l,a
+ ld de,(12 * 32)
+ add hl,de
+ xor a ; TRANSFERTOP
+ jr .doTransfer
+.transferTopThird
+ FuncCoord 0,0
+ ld hl,Coord
+ ld sp,hl
+ ld a,[H_AUTOBGTRANSFERDEST + 1]
+ ld h,a
+ ld a,[H_AUTOBGTRANSFERDEST]
+ ld l,a
+ ld a,TRANSFERMIDDLE
+ jr .doTransfer
+.transferMiddleThird
+ FuncCoord 0,6
+ ld hl,Coord
+ ld sp,hl
+ ld a,[H_AUTOBGTRANSFERDEST + 1]
+ ld h,a
+ ld a,[H_AUTOBGTRANSFERDEST]
+ ld l,a
+ ld de,(6 * 32)
+ add hl,de
+ ld a,TRANSFERBOTTOM
+.doTransfer
+ ld [H_AUTOBGTRANSFERPORTION],a ; store next portion
+ ld b,6
+
+TransferBgRows:: ; 1d9e (0:1d9e)
+; unrolled loop and using pop for speed
+
+ rept 20 / 2 - 1
+ pop de
+ ld [hl], e
+ inc l
+ ld [hl], d
+ inc l
+ endr
+
+ pop de
+ ld [hl], e
+ inc l
+ ld [hl], d
+
+i ld a, 32 - (20 - 1)
+ add l
+ ld l, a
+ jr nc, .ok
+ inc h
+.ok
+ dec b
+ jr nz, TransferBgRows
+
+ ld a, [H_SPTEMP]
+ ld h, a
+ ld a, [H_SPTEMP + 1]
+ ld l, a
+ ld sp, hl
+ ret
+
+; Copies [H_VBCOPYBGNUMROWS] rows from H_VBCOPYBGSRC to H_VBCOPYBGDEST.
+; If H_VBCOPYBGSRC is XX00, the transfer is disabled.
+VBlankCopyBgMap:: ; 1de1 (0:1de1)
+ ld a,[H_VBCOPYBGSRC] ; doubles as enabling byte
+ and a
+ ret z
+ ld hl,[sp + 0]
+ ld a,h
+ ld [H_SPTEMP],a
+ ld a,l
+ ld [H_SPTEMP + 1],a ; save stack pointer
+ ld a,[H_VBCOPYBGSRC]
+ ld l,a
+ ld a,[H_VBCOPYBGSRC + 1]
+ ld h,a
+ ld sp,hl
+ ld a,[H_VBCOPYBGDEST]
+ ld l,a
+ ld a,[H_VBCOPYBGDEST + 1]
+ ld h,a
+ ld a,[H_VBCOPYBGNUMROWS]
+ ld b,a
+ xor a
+ ld [H_VBCOPYBGSRC],a ; disable transfer so it doesn't continue next V-blank
+ jr TransferBgRows
+
+
+VBlankCopyDouble::
+; Copy [H_VBCOPYDOUBLESIZE] 1bpp tiles
+; from H_VBCOPYDOUBLESRC to H_VBCOPYDOUBLEDEST.
+
+; While we're here, convert to 2bpp.
+; The process is straightforward:
+; copy each byte twice.
+
+ ld a, [H_VBCOPYDOUBLESIZE]
+ and a
+ ret z
+
+ ld hl, [sp + 0]
+ ld a, h
+ ld [H_SPTEMP], a
+ ld a, l
+ ld [H_SPTEMP + 1], a
+
+ ld a, [H_VBCOPYDOUBLESRC]
+ ld l, a
+ ld a, [H_VBCOPYDOUBLESRC + 1]
+ ld h, a
+ ld sp, hl
+
+ ld a, [H_VBCOPYDOUBLEDEST]
+ ld l, a
+ ld a, [H_VBCOPYDOUBLEDEST + 1]
+ ld h, a
+
+ ld a, [H_VBCOPYDOUBLESIZE]
+ ld b, a
+ xor a ; transferred
+ ld [H_VBCOPYDOUBLESIZE], a
+
+.loop
+ rept 3
+ pop de
+ ld [hl], e
+ inc l
+ ld [hl], e
+ inc l
+ ld [hl], d
+ inc l
+ ld [hl], d
+ inc l
+ endr
+
+ pop de
+ ld [hl], e
+ inc l
+ ld [hl], e
+ inc l
+ ld [hl], d
+ inc l
+ ld [hl], d
+ inc hl
+ dec b
+ jr nz, .loop
+
+ ld a, l
+ ld [H_VBCOPYDOUBLEDEST], a
+ ld a, h
+ ld [H_VBCOPYDOUBLEDEST + 1], a
+
+ ld hl, [sp + 0]
+ ld a, l
+ ld [H_VBCOPYDOUBLESRC], a
+ ld a, h
+ ld [H_VBCOPYDOUBLESRC + 1], a
+
+ ld a, [H_SPTEMP]
+ ld h, a
+ ld a, [H_SPTEMP + 1]
+ ld l, a
+ ld sp, hl
+
+ ret
+
+
+VBlankCopy::
+; Copy [H_VBCOPYSIZE] 2bpp tiles
+; from H_VBCOPYSRC to H_VBCOPYDEST.
+
+; Source and destination addresses
+; are updated, so transfer can
+; continue in subsequent calls.
+
+ ld a, [H_VBCOPYSIZE]
+ and a
+ ret z
+
+ ld hl, [sp + 0]
+ ld a, h
+ ld [H_SPTEMP], a
+ ld a, l
+ ld [H_SPTEMP + 1], a
+
+ ld a, [H_VBCOPYSRC]
+ ld l, a
+ ld a, [H_VBCOPYSRC + 1]
+ ld h, a
+ ld sp, hl
+
+ ld a, [H_VBCOPYDEST]
+ ld l, a
+ ld a, [H_VBCOPYDEST + 1]
+ ld h, a
+
+ ld a, [H_VBCOPYSIZE]
+ ld b, a
+ xor a ; transferred
+ ld [H_VBCOPYSIZE], a
+
+.loop
+ rept 7
+ pop de
+ ld [hl], e
+ inc l
+ ld [hl], d
+ inc l
+ endr
+
+ pop de
+ ld [hl], e
+ inc l
+ ld [hl], d
+ inc hl
+ dec b
+ jr nz, .loop
+
+ ld a, l
+ ld [H_VBCOPYDEST], a
+ ld a, h
+ ld [H_VBCOPYDEST + 1], a
+
+ ld hl, [sp + 0]
+ ld a, l
+ ld [H_VBCOPYSRC], a
+ ld a, h
+ ld [H_VBCOPYSRC + 1], a
+
+ ld a, [H_SPTEMP]
+ ld h, a
+ ld a, [H_SPTEMP + 1]
+ ld l, a
+ ld sp, hl
+
+ ret
+
+
+UpdateMovingBgTiles::
+; Animate water and flower
+; tiles in the overworld.
+
+ ld a, [$ffd7]
+ and a
+ ret z
+
+ ld a, [$ffd8]
+ inc a
+ ld [$ffd8], a
+ cp $14
+ ret c
+ cp $15
+ jr z, .flower
+
+ ld hl, vTileset + $14 * $10
+ ld c, $10
+
+ ld a, [wd085]
+ inc a
+ and 7
+ ld [wd085], a
+
+ and 4
+ jr nz, .left
+.right
+ ld a, [hl]
+ rrca
+ ld [hli], a
+ dec c
+ jr nz, .right
+ jr .done
+.left
+ ld a, [hl]
+ rlca
+ ld [hli], a
+ dec c
+ jr nz, .left
+.done
+ ld a, [$ffd7]
+ rrca
+ ret nc
+ xor a
+ ld [$ffd8], a
+ ret
+
+.flower
+ xor a
+ ld [$ffd8], a
+
+ ld a, [wd085]
+ and 3
+ cp 2
+ ld hl, FlowerTile1
+ jr c, .copy
+ ld hl, FlowerTile2
+ jr z, .copy
+ ld hl, FlowerTile3
+.copy
+ ld de, vTileset + $3 * $10
+ ld c, $10
+.loop
+ ld a, [hli]
+ ld [de], a
+ inc de
+ dec c
+ jr nz, .loop
+ ret
+
+FlowerTile1: INCBIN "gfx/tilesets/flower/flower1.2bpp"
+FlowerTile2: INCBIN "gfx/tilesets/flower/flower2.2bpp"
+FlowerTile3: INCBIN "gfx/tilesets/flower/flower3.2bpp"
diff --git a/main.asm b/main.asm
index 4ba797f2..f6a021ad 100755
--- a/main.asm
+++ b/main.asm
@@ -1,5 +1,16 @@
INCLUDE "constants.asm"
+NPC_SPRITES_1 EQU $4
+NPC_SPRITES_2 EQU $5
+
+GFX EQU $4
+
+PICS_1 EQU $9
+PICS_2 EQU $A
+PICS_3 EQU $B
+PICS_4 EQU $C
+PICS_5 EQU $D
+
INCLUDE "home.asm"
@@ -1940,57 +1951,7 @@ Func_7c18: ; 7c18 (1:7c18)
SECTION "bank3",ROMX,BANK[$3]
-_Joypad::
- ld a, [hJoyInput]
- cp A_BUTTON + B_BUTTON + SELECT + START ; soft reset
- jp z, TrySoftReset
- ld b, a
- ld a, [hJoyHeldLast]
- ld e, a
- xor b
- ld d, a
- and e
- ld [hJoyReleased], a
- ld a, d
- and b
- ld [hJoyPressed], a
- ld a, b
- ld [hJoyHeldLast], a
- ld a, [wd730]
- bit 5, a
- jr nz, DiscardButtonPresses
- ld a, [hJoyHeldLast]
- ld [hJoyHeld], a
- ld a, [wJoyIgnore]
- and a
- ret z
- cpl
- ld b, a
- ld a, [hJoyHeld]
- and b
- ld [hJoyHeld], a
- ld a, [hJoyPressed]
- and b
- ld [hJoyPressed], a
- ret
-
-DiscardButtonPresses:
- xor a
- ld [hJoyHeld], a
- ld [hJoyPressed], a
- ld [hJoyReleased], a
- ret
-
-TrySoftReset:
- call DelayFrame
- ; reset joypad (to make sure the
- ; player is really trying to reset)
- ld a, $30
- ld [rJOYP], a
- ld hl, hSoftReset
- dec [hl]
- jp z, SoftReset
- jp Joypad
+INCLUDE "engine/joypad.asm"
INCLUDE "data/map_songs.asm"
@@ -4657,7 +4618,7 @@ INCLUDE "engine/hp_bar.asm"
INCLUDE "engine/hidden_object_functions3.asm"
-SECTION "bank4",ROMX,BANK[$4]
+SECTION "NPC Sprites 1", ROMX, BANK[NPC_SPRITES_1]
OakAideSprite: INCBIN "gfx/sprites/oak_aide.2bpp"
RockerSprite: INCBIN "gfx/sprites/rocker.2bpp"
@@ -4687,6 +4648,9 @@ SnorlaxSprite: INCBIN "gfx/sprites/snorlax.2bpp"
OldAmberSprite: INCBIN "gfx/sprites/old_amber.2bpp"
LyingOldManSprite: INCBIN "gfx/sprites/lying_old_man.2bpp"
+
+SECTION "Graphics", ROMX, BANK[GFX]
+
PokemonLogoGraphics: INCBIN "gfx/pokemon_logo.2bpp"
FontGraphics: INCBIN "gfx/font.1bpp"
ABTiles: INCBIN "gfx/AB.2bpp"
@@ -4701,6 +4665,9 @@ PokedexTileGraphics: INCBIN "gfx/pokedex.2bpp"
WorldMapTileGraphics: INCBIN "gfx/town_map.2bpp"
PlayerCharacterTitleGraphics: INCBIN "gfx/player_title.2bpp"
+
+SECTION "Battle (bank 4)", ROMX, BANK[$4]
+
INCLUDE "engine/battle/4.asm"
INCLUDE "engine/menu/status_screen.asm"
INCLUDE "engine/menu/party_menu.asm"
@@ -4710,17 +4677,13 @@ ShrinkPic1:: INCBIN "pic/trainer/shrink1.pic"
ShrinkPic2:: INCBIN "pic/trainer/shrink2.pic"
INCLUDE "engine/turn_sprite.asm"
-
INCLUDE "engine/menu/start_sub_menus.asm"
-
INCLUDE "engine/items/tms.asm"
-
INCLUDE "engine/battle/4_2.asm"
-
INCLUDE "engine/random.asm"
-SECTION "bank5",ROMX,BANK[$5]
+SECTION "NPC Sprites 2", ROMX, BANK[NPC_SPRITES_2]
RedCyclingSprite: INCBIN "gfx/sprites/cycling.2bpp"
RedSprite: INCBIN "gfx/sprites/red.2bpp"
@@ -4763,15 +4726,14 @@ BrunoSprite: INCBIN "gfx/sprites/bruno.2bpp"
LoreleiSprite: INCBIN "gfx/sprites/lorelei.2bpp"
SeelSprite: INCBIN "gfx/sprites/seel.2bpp"
-INCLUDE "engine/load_pokedex_tiles.asm"
+SECTION "Battle (bank 5)", ROMX, BANK[$5]
+
+INCLUDE "engine/load_pokedex_tiles.asm"
INCLUDE "engine/overworld/map_sprites.asm"
INCLUDE "engine/overworld/emotion_bubbles.asm"
-
INCLUDE "engine/evolve_trade.asm"
-
INCLUDE "engine/battle/5.asm"
-
INCLUDE "engine/menu/pc.asm"
@@ -5031,7 +4993,7 @@ INCLUDE "engine/menu/oaks_pc.asm"
INCLUDE "engine/hidden_object_functions7.asm"
-SECTION "bank9",ROMX,BANK[$9]
+SECTION "Pics 1", ROMX, BANK[PICS_1]
RhydonPicFront:: INCBIN "pic/bmon/rhydon.pic"
RhydonPicBack:: INCBIN "pic/monback/rhydonb.pic"
@@ -5092,10 +5054,12 @@ PinsirPicBack:: INCBIN "pic/monback/pinsirb.pic"
TangelaPicFront:: INCBIN "pic/bmon/tangela.pic"
TangelaPicBack:: INCBIN "pic/monback/tangelab.pic"
+
+SECTION "Battle (bank 9)", ROMX, BANK[$9]
INCLUDE "engine/battle/9.asm"
-SECTION "bankA",ROMX,BANK[$A]
+SECTION "Pics 2", ROMX, BANK[PICS_2]
GrowlithePicFront:: INCBIN "pic/bmon/growlithe.pic"
GrowlithePicBack:: INCBIN "pic/monback/growlitheb.pic"
@@ -5162,10 +5126,12 @@ JynxPicBack:: INCBIN "pic/monback/jynxb.pic"
MoltresPicFront:: INCBIN "pic/bmon/moltres.pic"
MoltresPicBack:: INCBIN "pic/monback/moltresb.pic"
+
+SECTION "Battle (bank A)", ROMX, BANK[$A]
INCLUDE "engine/battle/a.asm"
-SECTION "bankB",ROMX,BANK[$B]
+SECTION "Pics 3", ROMX, BANK[PICS_3]
ArticunoPicFront:: INCBIN "pic/bmon/articuno.pic"
ArticunoPicBack:: INCBIN "pic/monback/articunob.pic"
@@ -5238,6 +5204,9 @@ BeedrillPicBack:: INCBIN "pic/monback/beedrillb.pic"
FossilKabutopsPic:: INCBIN "pic/bmon/fossilkabutops.pic"
+
+SECTION "Battle (bank B)", ROMX, BANK[$B]
+
INCLUDE "engine/battle/b.asm"
TrainerInfoTextBoxTileGraphics: INCBIN "gfx/trainer_info.2bpp"
@@ -5250,7 +5219,7 @@ INCLUDE "engine/battle/b_2.asm"
INCLUDE "engine/game_corner_slots2.asm"
-SECTION "bankC",ROMX,BANK[$C]
+SECTION "Pics 4", ROMX, BANK[PICS_4]
DodrioPicFront:: INCBIN "pic/bmon/dodrio.pic"
DodrioPicBack:: INCBIN "pic/monback/dodriob.pic"
@@ -5314,10 +5283,12 @@ StarmiePicBack:: INCBIN "pic/monback/starmieb.pic"
RedPicBack:: INCBIN "pic/trainer/redb.pic"
OldManPic:: INCBIN "pic/trainer/oldman.pic"
+
+SECTION "Battle (bank C)", ROMX, BANK[$C]
INCLUDE "engine/battle/c.asm"
-SECTION "bankD",ROMX,BANK[$D]
+SECTION "Pics 5", ROMX, BANK[PICS_5]
BulbasaurPicFront:: INCBIN "pic/bmon/bulbasaur.pic"
BulbasaurPicBack:: INCBIN "pic/monback/bulbasaurb.pic"
@@ -5374,6 +5345,9 @@ WeepinbellPicBack:: INCBIN "pic/monback/weepinbellb.pic"
VictreebelPicFront:: INCBIN "pic/bmon/victreebel.pic"
VictreebelPicBack:: INCBIN "pic/monback/victreebelb.pic"
+
+SECTION "Battle (bank D)", ROMX, BANK[$D]
+
INCLUDE "engine/titlescreen2.asm"
INCLUDE "engine/battle/d.asm"
INCLUDE "engine/slot_machine.asm"
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-06 00:05:36 +0000