48 lines
431 B
ArmAsm
48 lines
431 B
ArmAsm
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.importzp TEMP
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.import popa, popax
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.include "nes.inc"
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.include "zpvars.inc"
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.export _vram_read
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;void __fastcall__ vram_read(unsigned char *dst,unsigned int size);
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_vram_read:
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sta <TEMP
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stx <TEMP+1
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jsr popax
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sta <TEMP+2
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stx <TEMP+3
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lda PPU_DATA
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ldy #0
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@1:
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lda PPU_DATA
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sta (TEMP+2),y
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inc <TEMP+2
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bne @2
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inc <TEMP+3
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@2:
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lda <TEMP
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bne @3
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dec <TEMP+1
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@3:
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dec <TEMP
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lda <TEMP
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ora <TEMP+1
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bne @1
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rts
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