mirror of https://github.com/pret/pokecrystal.git
134 lines
1.6 KiB
NASM
134 lines
1.6 KiB
NASM
GBCOnlyScreen:
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ldh a, [hCGB]
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and a
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ret nz
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ld de, MUSIC_NONE
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call PlayMusic
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call ClearTileMap
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ld hl, GBCOnlyGFX
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ld de, wGBCOnlyDecompressBuffer
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ldh a, [rSVBK]
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push af
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ld a, 0 ; this has the same effect as selecting bank 1
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ldh [rSVBK], a
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call Decompress
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pop af
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ldh [rSVBK], a
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ld de, wGBCOnlyDecompressBuffer
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ld hl, vTiles2
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lb bc, BANK(GBCOnlyGFX), 84
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call Get2bpp
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ld de, Font
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ld hl, vTiles1
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lb bc, BANK(Font), $80
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call Get1bpp
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call DrawGBCOnlyScreen
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call WaitBGMap
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; better luck next time
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.loop
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call DelayFrame
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jr .loop
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DrawGBCOnlyScreen:
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call DrawGBCOnlyBorder
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; Pokemon
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hlcoord 3, 2
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ld b, 14
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ld c, 4
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ld a, $8
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call DrawGBCOnlyGraphic
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; Crystal
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hlcoord 5, 6
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ld b, 10
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ld c, 2
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ld a, $40
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call DrawGBCOnlyGraphic
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ld de, GBCOnlyString
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hlcoord 1, 10
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call PlaceString
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ret
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DrawGBCOnlyBorder:
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hlcoord 0, 0
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ld [hl], 0 ; top-left
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inc hl
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ld a, 1 ; top
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call .FillRow
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ld [hl], 2 ; top-right
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hlcoord 0, 1
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ld a, 3 ; left
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call .FillColumn
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hlcoord 19, 1
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ld a, 4 ; right
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call .FillColumn
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hlcoord 0, 17
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ld [hl], 5 ; bottom-left
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inc hl
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ld a, 6 ; bottom
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call .FillRow
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ld [hl], 7 ; bottom-right
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ret
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.FillRow:
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ld c, SCREEN_WIDTH - 2
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.next_column
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ld [hli], a
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dec c
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jr nz, .next_column
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ret
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.FillColumn:
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ld de, SCREEN_WIDTH
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ld c, SCREEN_HEIGHT - 2
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.next_row
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ld [hl], a
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add hl, de
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dec c
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jr nz, .next_row
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ret
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DrawGBCOnlyGraphic:
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ld de, SCREEN_WIDTH
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.y
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push bc
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push hl
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.x
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ld [hli], a
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inc a
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dec b
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jr nz, .x
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pop hl
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add hl, de
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pop bc
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dec c
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jr nz, .y
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ret
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GBCOnlyString:
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db "This Game Pak is"
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next "designed only for"
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next "use on the"
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next "Game Boy Color.@"
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GBCOnlyGFX:
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INCBIN "gfx/sgb/gbc_only.2bpp.lz"
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