2017-12-15 18:22:26 -08:00
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RotateUnownFrontpic: ; e0000
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; something to do with Unown printer
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push de
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xor a
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call GetSRAMBank
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ld hl, sScratch
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ld bc, 0
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.loop
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push bc
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push hl
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push bc
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ld de, wd002
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call .Copy
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call .Rotate
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ld hl, UnownPrinter_OverworldMapRectangle
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pop bc
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add hl, bc
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add hl, bc
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ld a, [hli]
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ld e, a
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ld d, [hl]
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ld hl, wd012
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call .Copy
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pop hl
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ld bc, $10
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add hl, bc
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pop bc
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inc c
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ld a, c
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cp 7 * 7
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jr c, .loop
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ld hl, OverworldMap
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ld de, sScratch
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ld bc, 7 * 7 tiles
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call CopyBytes
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pop hl
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ld de, sScratch
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ld c, 7 * 7
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ld a, [hROMBank]
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ld b, a
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call Get2bpp
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call CloseSRAM
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ret
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.Copy: ; e004e
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ld c, $10
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.loop_copy
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ld a, [hli]
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ld [de], a
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inc de
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dec c
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jr nz, .loop_copy
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ret
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.Rotate: ; e0057
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ld hl, wd012
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ld e, %10000000
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ld d, 8
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.loop_decompress
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push hl
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ld hl, wd002
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call .CountSetBit
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pop hl
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ld a, b
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ld [hli], a
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push hl
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ld hl, wd003
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call .CountSetBit
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pop hl
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ld a, b
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ld [hli], a
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srl e
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dec d
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jr nz, .loop_decompress
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ret
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.CountSetBit: ; e0078
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ld b, 0
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ld c, 8
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.loop_count
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ld a, [hli]
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and e
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jr z, .clear
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scf
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jr .apply
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.clear
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and a
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.apply
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rr b
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inc hl
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dec c
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jr nz, .loop_count
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ret
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overworldmaprect: MACRO
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y = 0
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rept \1
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x = \1 * (\2 +- 1) + y
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rept \2
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dw OverworldMap tile x
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x = x +- \2
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endr
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y = y + 1
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endr
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2017-12-28 13:31:16 -08:00
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ENDM
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2017-12-15 18:22:26 -08:00
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UnownPrinter_OverworldMapRectangle: ; e008b
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overworldmaprect 7, 7
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