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4am 2018-10-31 22:41:49 -04:00
parent 66b33dfd2f
commit 0db950038c
1 changed files with 4 additions and 10 deletions
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14
src/fx/fx.hgr.common.a
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@ -33,22 +33,19 @@ HGRBlockCopy
; in: A = HGR row / 8 (0x00..0x17)
; Y = HGR column (0x00..0x27)
; out: Y preserved
; X = #$FF
; X = #$00
; Z set
; all other flags and registers clobbered
sty @y
asl
asl
asl
jsr HGRCalc
clc
ldx #$08
@y=*+1
ldy #$FD ; modified at runtime
@loop
lda ($3c),y
sta ($26),y
lda $27
clc
adc #$04
sta $27
eor #$60
@ -61,22 +58,19 @@ HGRBlockToWhite
; in: A = HGR row / 8 (0x00..0x17)
; Y = HGR column (0x00..0x27)
; out: Y preserved
; X = #$FF
; X = #$00
; Z set
; all other flags and registers clobbered
sty @y
asl
asl
asl
jsr HGRCalc
clc
ldx #$08
@y=*+1
ldy #$FD ; modified at runtime
@loop
lda #$7F
sta ($26),y
lda $27
clc
adc #$04
sta $27
eor #$60