61 lines
511 B
ArmAsm
61 lines
511 B
ArmAsm
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.importzp TEMP
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.include "nes.inc"
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.include "zpvars.inc"
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.export _vram_unrle
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;void __fastcall__ vram_unrle(const unsigned char *data);
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_vram_unrle:
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tay
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stx <RLE_HIGH
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lda #0
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sta <RLE_LOW
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lda (RLE_LOW),y
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sta <RLE_TAG
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iny
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bne @1
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inc <RLE_HIGH
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@1:
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lda (RLE_LOW),y
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iny
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bne @11
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inc <RLE_HIGH
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@11:
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cmp <RLE_TAG
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beq @2
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sta PPU_DATA
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sta <RLE_BYTE
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bne @1
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@2:
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lda (RLE_LOW),y
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beq @4
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iny
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bne @21
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inc <RLE_HIGH
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@21:
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tax
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lda <RLE_BYTE
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@3:
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sta PPU_DATA
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dex
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bne @3
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beq @1
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@4:
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rts
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