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z80_unpacker: optimisations: -1B by keeping write_ptr in DE'

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Peter Helcmanovsky (Ped)
2022-09-13 23:57:59 +02:00
parent 919a892ef0
commit d30baaa91f
2 changed files with 11 additions and 12 deletions
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4
z80_unpacker/example/example.asm
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@@ -24,9 +24,9 @@ start:
ldi a,(ix) ; fake: ld a,(ix) : inc ix
out (254),a
; call unpack of next image directly into VRAM
ld hl,$4000 ; target VRAM
ld de,$4000 ; target VRAM
exx
; IX = packed data, HL' = destination ($4000)
; IX = packed data, DE' = destination ($4000)
; returned IX will point right after the packed data
call upkr.unpack
; do some busy loop with CPU to delay between images