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base:rasterbars_4_source

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base:rasterbars_4_source [2022-03-15 19:10]
erhan created
base:rasterbars_4_source [2022-03-16 09:27] (current)
erhan
Line 18: Line 18:
  ldx #$00  ldx #$00
  ldy #$01  ldy #$01
- nop ;NTSC : change this byte to $d1, becomes cmp ($ea),y + nop ;NTSC : change this byte to $d1, becomes cmp ($ea),y
 br1 nop br1 nop
  cmp ($00,x)  cmp ($00,x)
-br2 lda #$00 ;NTSC : change this to lda $00,x +br2 lda #$00 ;NTSC : change this to lda $00,x
  cmp ($00,x)  cmp ($00,x)
   
Line 40: Line 40:
  bne br1  bne br1
 val1 lda #$00 ;badline code. Y=0 val1 lda #$00 ;badline code. Y=0
- sta $d021 ;NTSC : change this to sta$d021,y  + sta $d021 ;NTSC : change this to sta$d021,y  
- sta $d020 ;NTSC : change this to sta$d020,y + sta $d020 ;NTSC : change this to sta$d020,y
 val2 lda #$00  val2 lda #$00
  sta $d022,y  sta $d022,y
base/rasterbars_4_source.txt · Last modified: 2022-03-16 09:27 by erhan