ref: 056c2403667a6670815528e220b4e1e4ea974e32
dir: /home/map_objects.asm/
; 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 Function80e7 ret ; 1956 Function1956: ; 1956 ld [hConnectionStripLength], a call Function271e ld a, [hConnectionStripLength] call GetMapObject callba Function80e7 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