1 files changed, 683 insertions, 0 deletions
diff --git a/home/map_objects.asm b/home/map_objects.asm
new file mode 100644
index 000000000..3ebc1b597
--- /dev/null
+++ b/home/map_objects.asm
@@ -0,0 +1,683 @@
+; Functions handling map objects.
+
+
+GetSpritePalette: ; 17ff
+	push hl
+	push de
+	push bc
+	ld c, a
+	callba _GetSpritePalette
+	ld a, c
+	pop bc
+	pop de
+	pop hl
+	ret
+; 180e
+
+
+Function180e: ; 180e
+	push hl
+	push bc
+	ld hl, $d156
+	ld c, $1f
+	ld b, a
+	ld a, [hConnectionStripLength]
+	cp $0
+	jr z, .asm_182b
+	ld a, b
+.asm_181d
+	cp [hl]
+	jr z, .asm_1830
+	inc hl
+	inc hl
+	dec c
+	jr nz, .asm_181d
+	ld a, [$d155]
+	scf
+	jr .asm_1833
+
+.asm_182b
+	ld a, [$d155]
+	jr .asm_1833
+
+.asm_1830
+	inc hl
+	xor a
+	ld a, [hl]
+
+.asm_1833
+	pop bc
+	pop hl
+	ret
+; 1836
+
+Function1836: ; 1836
+	push de
+	push hl
+
+	ld b, a
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(Function142a7)
+	rst Bankswitch
+
+	ld a, b
+	call Function142a7
+	ld c, a
+
+	pop de
+	ld a, d
+	rst Bankswitch
+
+	pop hl
+	pop de
+	ret
+; 184a
+
+
+
+Function184a: ; 184a
+	ld a, [StandingTile]
+	call GetTileCollision
+	ld b, a
+	ret
+; 1852
+
+Function1852: ; 1852
+	ld a, [StandingTile]
+	call GetTileCollision
+	sub 1
+	ret z
+	and a
+	ret
+; 185d
+
+
+GetTileCollision: ; 185d
+; Get the collision type of tile a.
+
+	push de
+	push hl
+
+	ld hl, TileCollisionTable
+	ld e, a
+	ld d, 0
+	add hl, de
+
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(TileCollisionTable)
+	rst Bankswitch
+	ld e, [hl]
+	pop af
+	rst Bankswitch
+
+	ld a, e
+	and $f ; lo nybble only
+
+	pop hl
+	pop de
+	ret
+; 1875
+
+
+Function1875: ; 1875
+	ld d, a
+	and $f0
+	cp $10
+	jr z, .asm_1882
+	cp $20
+	jr z, .asm_1888
+	scf
+	ret
+
+.asm_1882
+	ld a, d
+	and 7
+	ret z
+	scf
+	ret
+
+.asm_1888
+	ld a, d
+	and 7
+	ret z
+	scf
+	ret
+; 188e
+
+Function188e: ; 188e
+	cp $14
+	ret z
+	cp $1c
+	ret
+; 1894
+
+CheckCutTreeTile: ; 1894
+	cp $12
+	ret z
+	cp $1a
+	ret
+; 189a
+
+CheckHeadbuttTreeTile: ; 189a
+	cp $15
+	ret z
+	cp $1d
+	ret
+; 18a0
+
+CheckCounterTile: ; 18a0
+	cp $90
+	ret z
+	cp $98
+	ret
+; 18a6
+
+CheckPitTile: ; 18a6
+	cp $60
+	ret z
+	cp $68
+	ret
+; 18ac
+
+CheckIceTile: ; 18ac
+	cp $23
+	ret z
+	cp $2b
+	ret z
+	scf
+	ret
+; 18b4
+
+CheckWhirlpoolTile: ; 18b4
+	nop
+	cp $24
+	ret z
+	cp $2c
+	ret z
+	scf
+	ret
+; 18bd
+
+CheckWaterfallTile: ; 18bd
+	cp $33
+	ret z
+	cp $3b
+	ret
+; 18c3
+
+CheckStandingOnEntrance: ; 18c3
+	ld a, [StandingTile]
+	cp $71 ; door
+	ret z
+	cp $79
+	ret z
+	cp $7a ; stairs
+	ret z
+	cp $7b ; cave
+	ret
+; 18d2
+
+
+GetMapObject: ; 18d2
+; Return the location of map object a in bc.
+	ld hl, MapObjects
+	ld bc, $10
+	call AddNTimes
+	ld b, h
+	ld c, l
+	ret
+; 18de
+
+
+Function18de: ; 18de
+	ld [hConnectionStripLength], a
+	call GetMapObject
+	ld hl, $0000
+	add hl, bc
+	ld a, [hl]
+	cp $ff
+	jr z, .asm_18f3
+	ld [hConnectedMapWidth], a
+	call Function1ae5
+	and a
+	ret
+
+.asm_18f3
+	scf
+	ret
+; 18f5
+
+Function18f5: ; 18f5
+	ld hl, $0006
+	add hl, bc
+	ld a, [hl]
+	cp $ff
+	jr nz, .asm_1921
+	ld hl, $0007
+	add hl, bc
+	ld a, [hl]
+	cp $ff
+	jr z, .asm_191c
+	ld hl, .data_191e
+	ld a, [TimeOfDay]
+	add l
+	ld l, a
+	jr nc, .asm_1912
+	inc h
+
+.asm_1912
+	ld a, [hl]
+	ld hl, $0007
+	add hl, bc
+	and [hl]
+	jr nz, .asm_191c
+	scf
+	ret
+
+.asm_191c
+	and a
+	ret
+
+.data_191e
+	db $1
+	db $2
+	db $4
+
+.asm_1921
+	ld hl, $0006
+	add hl, bc
+	ld d, [hl]
+	ld hl, $0007
+	add hl, bc
+	ld e, [hl]
+	ld hl, hHours
+	ld a, d
+	cp e
+	jr z, .asm_1949
+	jr c, .asm_193f
+	ld a, [hl]
+	cp d
+	jr nc, .asm_1949
+	cp e
+	jr c, .asm_1949
+	jr z, .asm_1949
+	jr .asm_194b
+
+.asm_193f
+	ld a, e
+	cp [hl]
+	jr c, .asm_194b
+	ld a, [hl]
+	cp d
+	jr nc, .asm_1949
+	jr .asm_194b
+
+.asm_1949
+	and a
+	ret
+
+.asm_194b
+	scf
+	ret
+; 194d
+
+Function194d: ; 194d
+	ld [hConnectionStripLength], a
+	call GetMapObject
+	call $40e7
+	ret
+; 1956
+
+
+
+Function1956: ; 1956
+	ld [hConnectionStripLength], a
+	call Function271e
+	ld a, [hConnectionStripLength]
+	call GetMapObject
+	ld a, $2
+	ld hl, $40e7
+	rst FarCall
+	ret
+; 1967
+
+Function1967: ; 1967
+	ld [hConnectionStripLength], a
+	call GetMapObject
+	ld hl, $0000
+	add hl, bc
+	ld a, [hl]
+	cp $ff
+	ret z
+	ld [hl], $ff
+	push af
+	call Function1985
+	pop af
+	call Function1ae5
+	callba Function4357
+	ret
+; 1985
+
+Function1985: ; 1985
+	ld hl, $d4cd
+	cp [hl]
+	jr z, .asm_1990
+	ld hl, $d4ce
+	cp [hl]
+	ret nz
+
+.asm_1990
+	callba Function581f
+	ld a, $ff
+	ld [$d4cd], a
+	ld [$d4ce], a
+	ret
+; 199f
+
+Function199f: ; 199f
+	call Function1967
+	call Function2712
+	ret
+; 19a6
+
+Function19a6: ; 19a6
+	push hl
+	call GetMapObject
+	ld d, b
+	ld e, c
+	ld a, $ff
+	ld [de], a
+	inc de
+	pop hl
+	ld bc, $000f
+	call CopyBytes
+	ret
+; 19b8
+
+Function19b8: ; 19b8
+	call GetMapObject
+	ld hl, $0000
+	add hl, bc
+	ld a, [hl]
+	push af
+	ld [hl], $ff
+	inc hl
+	ld bc, $000f
+	xor a
+	call ByteFill
+	pop af
+	cp $ff
+	ret z
+	cp $d
+	ret nc
+	ld b, a
+	ld a, [$d4cd]
+	cp b
+	jr nz, .asm_19de
+	ld a, $ff
+	ld [$d4cd], a
+
+.asm_19de
+	ld a, b
+	call Function1ae5
+	callba Function4357
+	ret
+; 19e9
+
+
+
+Function19e9: ; 19e9
+	ld [$c2e2], a
+	ld a, [hROMBank]
+	ld [$c2e3], a
+	ld a, l
+	ld [$c2e4], a
+	ld a, h
+	ld [$c2e5], a
+	ld a, [$c2e2]
+	call Function18de
+	ret c
+	ld hl, $0003
+	add hl, bc
+	ld [hl], $14
+	ld hl, $0009
+	add hl, bc
+	ld [hl], $0
+	ld hl, VramState
+	set 7, [hl]
+	and a
+	ret
+; 1a13
+
+
+
+Function1a13: ; 1a13
+	push bc
+	push de
+	ld hl, $d4d6
+	ld de, $0028
+	ld c, $d
+.asm_1a1d
+	ld a, [hl]
+	and a
+	jr z, .asm_1a28
+	add hl, de
+	dec c
+	jr nz, .asm_1a1d
+	xor a
+	jr .asm_1a2c
+
+.asm_1a28
+	ld a, $d
+	sub c
+	scf
+
+.asm_1a2c
+	pop de
+	pop bc
+	ret
+; 1a2f
+
+
+
+Function1a2f: ; 1a2f
+	ld hl, $0003
+	add hl, bc
+	ld a, [hl]
+	cp $25
+	jr c, .asm_1a39
+	xor a
+
+.asm_1a39
+	ld hl, Data4273
+	ld e, a
+	ld d, 0
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	ld a, [hl]
+	ret
+; 1a47
+
+Function1a47: ; 1a47
+	push bc
+	push de
+	ld e, a
+	ld d, 0
+	ld hl, Data4273 + 1
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	ld a, BANK(Data4273)
+	call GetFarByte
+	add a
+	add a
+	and $c
+	pop de
+	pop bc
+	ret
+; 1a61
+
+
+Function1a61: ; 1a61
+	ld l, a
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(Data4273)
+	rst Bankswitch
+	ld a, l
+	push bc
+
+	call Function1a71
+
+	pop bc
+	pop af
+	rst Bankswitch
+
+	ret
+; 1a71
+
+Function1a71: ; 1a71
+	ld hl, $0003
+	add hl, de
+	ld [hl], a
+	push de
+	ld e, a
+	ld d, 0
+	ld hl, Data4273 + 1
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	ld b, h
+	ld c, l
+	pop de
+	ld a, [bc]
+	inc bc
+	rlca
+	rlca
+	and $c
+	ld hl, $0008
+	add hl, de
+	ld [hl], a
+	ld a, [bc]
+	inc bc
+	ld hl, $000b
+	add hl, de
+	ld [hl], a
+	ld a, [bc]
+	inc bc
+	ld hl, $0004
+	add hl, de
+	ld [hl], a
+	ld a, [bc]
+	inc bc
+	ld hl, $0005
+	add hl, de
+	ld [hl], a
+	ld a, [bc]
+	inc bc
+	ld hl, $0006
+	add hl, de
+	ld [hl], a
+	ret
+; 1aae
+
+Function1aae: ; 1aae
+	ld a, [hROMBank]
+	push af
+	ld a, [hli]
+	rst Bankswitch
+
+	ld a, [hli]
+	ld d, [hl]
+	ld hl, $001b
+	add hl, bc
+	add [hl]
+	ld e, a
+	ld a, d
+	adc $0
+	ld d, a
+	inc [hl]
+	ld a, [de]
+	ld h, a
+	pop af
+	rst Bankswitch
+
+	ld a, h
+	ret
+; 1ac6
+
+Function1ac6: ; 1ac6
+	ld hl, VramState
+	set 0, [hl]
+	ret
+; 1acc
+
+Function1acc: ; 1acc
+	ld hl, VramState
+	res 0, [hl]
+	ret
+; 1ad2
+
+
+Function1ad2: ; 1ad2
+	ld a, [VramState]
+	bit 0, a
+	ret z
+	callba Function55e0
+	callba Function5920
+	ret
+; 1ae5
+
+
+Function1ae5: ; 1ae5
+	ld bc, $0028
+	ld hl, $d4d6
+	call AddNTimes
+	ld b, h
+	ld c, l
+	ret
+; 1af1
+
+Function1af1: ; 1af1
+	ld hl, $0000
+	add hl, bc
+	ld a, [hl]
+	and a
+	ret
+; 1af8
+
+Function1af8: ; 1af8
+	push af
+	ld hl, $0008
+	add hl, bc
+	ld a, [hl]
+	and $f3
+	ld e, a
+	pop af
+	and $c
+	or e
+	ld [hl], a
+	ret
+; 1b07
+
+
+GetSpriteDirection: ; 1b07
+	ld hl, $0008
+	add hl, bc
+	ld a, [hl]
+	and $c
+	ret
+; 1b0f
+