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