summaryrefslogtreecommitdiff
path: root/src/engine
diff options
context:
space:
mode:
Diffstat (limited to 'src/engine')
-rw-r--r--src/engine/bank03.asm19
-rw-r--r--src/engine/bank04.asm6
-rw-r--r--src/engine/bank20.asm225
-rw-r--r--src/engine/home.asm35
4 files changed, 238 insertions, 47 deletions
diff --git a/src/engine/bank03.asm b/src/engine/bank03.asm
index e63481f..e89bbfb 100644
--- a/src/engine/bank03.asm
+++ b/src/engine/bank03.asm
@@ -128,9 +128,9 @@ Func_c10a: ; c10a (3:410a)
; closes dialogue window. seems to be for other things as well.
CloseDialogueBox: ; c111 (3:4111)
- ld a, [wd0c1]
+ ld a, [wd0c1] ; with 0 set i can't move cursors, can move around
bit 0, a
- call nz, Func_c135
+ call nz, Func_c135 ; seems to actually close the dialog window
ld a, [wd0c1]
bit 1, a
jr z, .asm_c12a
@@ -144,10 +144,11 @@ CloseDialogueBox: ; c111 (3:4111)
ld [wd0bf], a
ret
+; this seems to legitimately close the dialogue box
Func_c135: ; c135 (3:4135)
push hl
- farcall Func_80028
- ld hl, wd0c1
+ farcall Func_80028 ; Draw background of the current room, I think
+ ld hl, wd0c1 ; at this point, the background tiles are back to normal
res 0, [hl]
pop hl
ret
@@ -1236,7 +1237,7 @@ Func_c943: ; c943 (3:4943)
ld [wd4c6], a
ld de, wd3ab
ld bc, $0006
- call Func_3bf5
+ call CopyBankedDataToDE
ld a, [wd3ab]
or a
jr z, .asm_c98f
@@ -2324,12 +2325,12 @@ Func_d0be: ; d0be (3:50be)
farcall Func_1c461
jp IncreaseOWScriptPointerBy3
-Func_d0ce: ; d0ce (3:50ce)
+OWScript_DoFrames: ; d0ce (3:50ce)
push bc
call DoFrameIfLCDEnabled
pop bc
dec c
- jr nz, Func_d0ce
+ jr nz, OWScript_DoFrames
jp IncreaseOWScriptPointerBy2
Func_d0d9: ; d0d9 (3:50d9)
@@ -2922,10 +2923,10 @@ asm_d4e6
OWSequence_d52e: ; d52e (3:552e)
start_script
- run_script Func_d0ce
+ run_script OWScript_DoFrames
db $3c
run_script Func_d3e0
- run_script Func_d0ce
+ run_script OWScript_DoFrames
db $78
run_script Func_d36d
db $02
diff --git a/src/engine/bank04.asm b/src/engine/bank04.asm
index 48b6c12..2ebb399 100644
--- a/src/engine/bank04.asm
+++ b/src/engine/bank04.asm
@@ -1004,7 +1004,7 @@ OverworldScriptTable: ; 1217b (4:617b)
dw Func_d088
dw Func_d095
dw Func_d0be
- dw Func_d0ce
+ dw OWScript_DoFrames
dw Func_d0d9
dw Func_d0f2
dw Func_ce4a
@@ -1331,7 +1331,7 @@ Func_12ae2: ; 12ae2 (4:6ae2)
ld [hli], a
push hl
ld l, $6
- farcall Func_8020f
+ farcall GetMapDataPointer
farcall Func_80229
pop hl
ld a, [wd4c6]
@@ -1374,7 +1374,7 @@ Func_12b13: ; 12b13 (4:6b13)
ld [hl], a
ld de, wd23e
ld bc, $0004
- call Func_3bf5
+ call CopyBankedDataToDE
pop hl
ld de, wd23e
ld a, [de]
diff --git a/src/engine/bank20.asm b/src/engine/bank20.asm
index d2acf6a..967ffb0 100644
--- a/src/engine/bank20.asm
+++ b/src/engine/bank20.asm
@@ -2,7 +2,7 @@ Func_80000: ; 80000 (20:4000)
INCROM $80000, $80028
Func_80028: ; 80028 (20:4028)
- call Func_801f1
+ call Func_801f1 ; Clears the first x800 bytes of S1:a000
ld bc, $0000
call Func_80077
farcall $3, $49c7
@@ -13,6 +13,7 @@ Func_80028: ; 80028 (20:4028)
INCROM $8003d, $80077
+; loads the background it seems. Also includes background tile permissions?
Func_80077: ; 80077 (20:4077)
ld a, $1
ld [wd292], a
@@ -25,37 +26,187 @@ Func_80077: ; 80077 (20:4077)
push hl
push bc
push de
- call BCCoordToBGMap0Address
+ call BCCoordToBGMap0Address ; de
ld hl, wd4c2
ld [hl], e
inc hl
ld [hl], d
- call $43b9
+ call Func_803b9 ; load more d4c* stuff from mapdatapointers
ld a, [wd4c6]
- ld [wd23d], a
+ ld [wd23d], a ; copies the bank of the data we loaded to wd23d
ld de, wd23e
ld bc, $0006
- call Func_3bf5
+ call CopyBankedDataToDE ; copies 6 bytes to wd23e+
ld l, e
- ld h, d
+ ld h, d ; then copies that data into various other places?
ld a, [hli]
- ld [wd12f], a
+ ld [wd12f], a ; just happens to correspond to size of room
ld a, [hli]
- ld [wd130], a
+ ld [wd130], a ; hmmm
ld a, [hli]
- ld [wd23a], a
+ ld [wd23a], a ; these 3 are before this data and after room collision
ld a, [hli]
ld [wd23b], a
ld a, [hli]
ld [wd23c], a
- call $40bd
+ call Func_800bd ; moves the background data to some place vblank knows about
pop de
pop bc
pop hl
ret
-; 0x800bd
- INCROM $800bd, $801a1
+Func_800bd: ; 800bd (20:40bd)
+ push hl
+ push bc
+ push de
+ ld a, [wd4c4] ; these are still the copy locations
+ add $05
+ ld e, a
+ ld a, [wd4c5]
+ adc $00
+ ld d, a ; de = [wd4c4/5] + 5
+ ld b, $c0 ; b = c0
+ call Func_08bf
+ ld a, [wd4c2]
+ ld e, a
+ ld a, [wd4c3] ; bg map coord from earlier
+ ld d, a
+ call Func_800e0
+ pop de
+ pop bc
+ pop hl
+ ret
+
+; de is a bg map coord
+Func_800e0: ; 800e0 (20:40e0)
+ push hl
+ ld hl, $d28e
+ ld a, [wd12f]
+ ld [hl], a
+ ld a, [wd23c]
+ or a
+ jr z, .asm_800f0
+ sla [hl] ; if wd23c is nonzero, double d28e
+.asm_800f0
+ ld c, $40
+ ld hl, wd23e
+ xor a
+.asm_800f6
+ ld [hli], a
+ dec c
+ jr nz, .asm_800f6 ; clear out wd23e-40+
+ ld a, [wd130]
+ ld c, a
+.asm_800fe
+ push bc ; push the height of this map
+ push de ; push the destination of this map
+ ld b, $00
+ ld a, [$d28e]
+ ld c, a ; bc is now the width
+ ld de, wd23e ; wd23e is the place we copied map data to (The 6 bytes) before
+ call Func_3be4
+ ld a, [wd12f]
+ ld b, a
+ pop de
+ push de
+ ld hl, wd23e
+ call Func_8016e
+ ld a, [wConsole]
+ cp $02
+ jr nz, .asm_8013b
+ call BankswitchVRAM1
+ ld a, [wd12f]
+ ld c, a
+ ld b, $00
+ ld hl, wd23e
+ add hl, bc
+ pop de
+ push de
+ ld a, [wd12f]
+ ld b, a
+ call Func_80148
+ call Func_8016e
+ call BankswitchVRAM0
+.asm_8013b
+ pop de
+ ld hl, $20
+ add hl, de
+ ld e, l
+ ld d, h
+ pop bc
+ dec c
+ jr nz, .asm_800fe
+ pop hl
+ ret
+; 0x80148
+
+Func_80148: ; 80148 (20:4148)
+ ld a, [$d291]
+ or a
+ ret z
+ ld a, [$d23c]
+ or a
+ jr z, .asm_80162
+ push hl
+ push bc
+.asm_80155
+ push bc
+ ld a, [$d291]
+ add [hl]
+ ld [hli], a
+ pop bc
+ dec b
+ jr nz, .asm_80155
+ pop bc
+ pop hl
+ ret
+.asm_80162
+ push hl
+ push bc
+ ld a, [$d291]
+.asm_80167
+ ld [hli], a
+ dec b
+ jr nz, .asm_80167
+ pop bc
+ pop hl
+ ret
+
+Func_8016e: ; 8016e (20:416e)
+ ld a, [wd292]
+ or a
+ jp z, SafeCopyDataHLtoDE
+ push hl
+ push bc
+ push de
+ ldh a, [hBankSRAM]
+ push af
+ ld a, $01
+ call BankswitchSRAM
+ push hl
+ ld hl, $800
+ ldh a, [hBankVRAM]
+ or a
+ jr z, .asm_8018c
+ ld hl, $c00
+.asm_8018c
+ add hl, de
+ ld e, l
+ ld d, h
+ pop hl
+.asm_80190
+ ld a, [hli]
+ ld [de], a
+ inc de
+ dec b
+ jr nz, .asm_80190
+ pop af
+ call BankswitchSRAM
+ call DisableSRAM
+ pop de
+ pop bc
+ pop hl
+ ret
Func_801a1: ; 801a1 (20:41a1)
push hl
@@ -108,6 +259,7 @@ Func_801a1: ; 801a1 (20:41a1)
pop hl
ret
+; Clears the first x800 bytes of S1:a000
Func_801f1: ; 801f1 (20:41f1)
push hl
push bc
@@ -118,7 +270,7 @@ Func_801f1: ; 801f1 (20:41f1)
ld hl, $a000
ld bc, $0800
xor a
- call $3c10
+ call FillMemoryWithA
pop af
call BankswitchSRAM
call DisableSRAM
@@ -126,7 +278,7 @@ Func_801f1: ; 801f1 (20:41f1)
pop hl
ret
-Func_8020f: ; 8020f (20:420f)
+GetMapDataPointer: ; 8020f (20:420f)
push bc
push af
ld bc, MapDataPointers
@@ -135,17 +287,18 @@ Func_8020f: ; 8020f (20:420f)
ld c, [hl]
inc hl
ld b, [hl]
- pop af
+ pop af ; bc = [MapDataPointers+l]
ld l, a
ld h, $0
sla l
rl h
sla l
rl h
- add hl, bc
+ add hl, bc ; hl = [MapDataPointers+l] + 4*a
pop bc
ret
+; These vars are used as a copy source for something about drawing the background?
Func_80229: ; 80229 (20:4229)
ld a, [hli]
ld [wd4c4], a
@@ -162,7 +315,7 @@ Func_80229: ; 80229 (20:4229)
Func_8025b: ; 8025b (20:425b)
push hl
ld l, $4
- call Func_8020f
+ call GetMapDataPointer
call Func_80229
ld a, [hl]
push af
@@ -234,7 +387,19 @@ Func_802bb: ; 802bb (20:42bb)
ret
; 0x802d4
- INCROM $802d4, $80418
+ INCROM $802d4, $803b9
+
+Func_803b9: ; 803b9 (20:43b9)
+ ld l, $00
+ ld a, [wd131] ; current screen/state/almost room?
+ call GetMapDataPointer
+ call Func_80229 ; basically get pointer to background tilemap?
+ ld a, [hl]
+ ld [$d239], a ; the final value in mapDataPointer goes to this mystery
+ ret
+; 0x803c9
+
+ INCROM $803c9, $80418
Func_80418: ; 80418 (20:4418)
INCROM $80418, $80480
@@ -332,5 +497,27 @@ Func_80ba4: ; 80ba4 (20:4ba4)
Unknown_80e5a: ; 80e5a (20:4e5a)
INCROM $80e5a, $80e5d
+; might be closer to "screen specific data" than map data
+; ex: one thing is reading from something that changes multipl times in loading
+; of screens, and changes in duels (4d131)
MapDataPointers: ; 80e5d (20:4e5d)
- INCROM $80e5d, $84000
+ dw MapDataPointers_80e67
+ dw MapDataPointers_8100f
+ dw MapDataPointers_8116b
+ dw MapDataPointers_81333
+ dw MapDataPointers_81697
+
+MapDataPointers_80e67: ; 80e67 (20:4e67)
+ INCROM $80e67, $8100f
+
+MapDataPointers_8100f: ; 8100f (20:500f)
+ INCROM $8100f, $8116b
+
+MapDataPointers_8116b: ; 8116b (20:516b)
+ INCROM $8116b, $81333
+
+MapDataPointers_81333: ; 81333 (20:5333)
+ INCROM $81333, $81697
+
+MapDataPointers_81697: ; 81697 (20:5697)
+ INCROM $81697, $84000
diff --git a/src/engine/home.asm b/src/engine/home.asm
index 5acb742..450d9c1 100644
--- a/src/engine/home.asm
+++ b/src/engine/home.asm
@@ -1537,37 +1537,39 @@ UpdateRNGSources: ; 089b (0:089b)
pop hl
ret
+; ld d, a ; de = wd4c4/5 + 5
+; ld b, $c0 ; b = c0
Func_08bf: ; 08bf (0:08bf)
ld hl, wcad6
ld [hl], e
inc hl
- ld [hl], d
+ ld [hl], d ; load wcad6/7 with [wd4c4]+5
ld hl, wcad8
ld [hl], $1
- inc hl
+ inc hl ; wcad8 is 1, a bunch of things after it are 0
xor a
ld [hli], a
ld [hli], a
ld [hli], a
ld [hli], a
- ld [hl], b
+ ld [hl], b ; then wcad i think is set to c0
inc hl
- ld [hli], a
- ld [hl], $ef
+ ld [hli], a ; 0
+ ld [hl], $ef ; and ef
ld h, b
- ld l, $0
+ ld l, $0 ; hl is now c000, first byte of wram, first card collection or no name
xor a
.asm_8d9
- ld [hl], a
- inc l
+ ld [hl], a ; 0 out ff bytes
+ inc l ; inc the first ff bytes of wram (was an arg so could be other stuff)
jr nz, .asm_8d9
ret
Func_08de: ; 08de (0:08de)
- push hl
- push de
+ push hl ; wd23e + 40 i think?
+ push de ; 6 mdp bytes
.asm_8e0
- push bc
+ push bc ; as of first run, bc is the width
call Func_08ef
ld [de], a
inc de
@@ -1584,7 +1586,7 @@ Func_08ef: ; 08ef (0:08ef)
ld hl, wcadc
ld a, [hl]
or a
- jr z, .asm_902
+ jr z, .asm_902 ; for the purpose of this, we made it 0 earlier
dec [hl]
inc hl
.asm_8f8
@@ -1603,9 +1605,9 @@ Func_08ef: ; 08ef (0:08ef)
ld c, [hl]
inc hl
ld b, [hl]
- inc hl
- dec [hl]
- inc hl
+ inc hl ; get pointer from wcad6/7
+ dec [hl] ; dec wcad8 (was 1)
+ inc hl ; wcad9
jr nz, .asm_914
dec hl
ld [hl], $8
@@ -11329,7 +11331,8 @@ Func_3be4: ; 3be4 (0:3be4)
ret
; 0x3bf5
-Func_3bf5: ; 3bf5 (0:3bf5)
+; Copies bc bytes from [wd4c4] to de
+CopyBankedDataToDE: ; 3bf5 (0:3bf5)
ldh a, [hBankROM]
push af
push hl
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-07 19:03:27 +0000