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correction

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Irmen de Jong 2021-11-28 18:59:36 +01:00
parent 9256f910f0
commit cafab98d10
1 changed files with 5 additions and 6 deletions
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11
examples/plasma.p8
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@ -77,16 +77,15 @@ main {
for y in 24 downto 0 { for y in 24 downto 0 {
for x in 39 downto 0 { for x in 39 downto 0 {
; using a temp var here to enable expression optimization that can't be done on a 'problematic' ROM/RAM memory location ; using a temp var here to enable expression optimization that can't be done on a 'problematic' ROM/RAM memory location
ubyte cc = xbuf[x] + ybuf[y] ubyte @zp cc = xbuf[x] + ybuf[y]
@(screen+x) = cc @(screen+x) = cc
; this is the fastest way to do this inner part: ; this is the fastest way to do this inner part:
; %asm {{ ; %asm {{
; ldy i ; ldy y
; lda xbuf,y ; lda ybuf,y
; ldy ii ; ldy x
; clc ; clc
; adc ybuf,y ; adc xbuf,y
; ldy #0
; sta (screen),y ; sta (screen),y
; }} ; }}
} }