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colorwash routine code comments updates

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Rocco 2015-11-28 22:26:10 +01:00
parent 735b1cd736
commit e90a169815
1 changed files with 6 additions and 6 deletions
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12
code/sub_colorwash.asm
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@ -7,20 +7,20 @@ cycle1 ldy color-1,x ; remember the current color in color table in this it
tya ; transfer our remembered color back to accumulator
dex ; decrement x-register to go to next iteration
bne cycle1 ; repeat if there are iterations left
sta color+$27 ; otherwise store te final color into accumulator
sta color+$27 ; otherwise store te last color from accu into color table
sta $d990 ; ... and into Color Ram
colwash2 ldx #$00 ; load x-register with #$00 to track iterations
lda color2+$27 ; load the last color from the second table
colwash2 ldx #$00 ; load x-register with #$00
lda color2+$27 ; load the last color from the second color table
cycle2 ldy color2,x ; remember previously used color of second table in y-register
sta color2,x ; store that color into accumulator
cycle2 ldy color2,x ; remember color at currently looked color2 table location
sta color2,x ; overwrite location with color from accumulator
sta $d9e0,x ; ... and write it to Color Ram
tya ; transfer our remembered color back to accumulator
inx ; increment x-register to go to next iteraton
cpx #$26 ; have we gone through 39 iterations yet?
bne cycle2 ; if no, repeat
sta color2+$27 ; if yes, store the final color into accumulator
sta color2+$27 ; if yes, store the final color from accu into color2 table
sta $d9e0+$27 ; and write it into Color Ram
rts ; return from subroutine