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base:rasterbars_small_source [2015-04-17 04:33] (current)
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 +====== Rasterbars 3 source ======
 +
 +A minimalistic rasterbar routine. No timing tables used.
 +
 +<code>
 +;coded by Graham/Oxyron
 +
 + *= $c000
 +
 + lda #$7f
 + sta $dc0d
 + and $d011
 + sta $d011
 + lda #$32
 + sta $d012
 +
 + sei
 + lda #<irq
 + sta $0314
 + lda #>irq
 + sta $0315
 + lda #$01
 + sta $d01a
 + cli
 + rts
 +
 +irq:
 + lda #$ff
 + sta $d019
 +
 + ldx #$05
 +d dex
 + bne d
 +
 + ldx #$00
 +c ldy #$08
 +a lda colors,x
 + sta $d020
 + sta $d021
 + inx
 + dey
 + beq c
 +
 + txa
 + ldx #$07
 +b dex
 + bne b
 + tax
 +
 + cpx #$8c
 + bcc a
 +
 + jmp $ea34
 +
 + *= $c100
 +colors:
 + .byte $09,$02,$08,$0a,$0f,$07,$01,$07,$0f,$0a,$08,$02,$09,$00
 + .byte $06,$04,$0e,$05,$03,$0d,$01,$0d,$03,$05,$0e,$04,$06,$00
 + .byte $09,$02,$08,$0a,$0f,$07,$01,$07,$0f,$0a,$08,$02,$09,$00
 + .byte $06,$04,$0e,$05,$03,$0d,$01,$0d,$03,$05,$0e,$04,$06,$00
 + .byte $09,$02,$08,$0a,$0f,$07,$01,$07,$0f,$0a,$08,$02,$09,$00
 + .byte $06,$04,$0e,$05,$03,$0d,$01,$0d,$03,$05,$0e,$04,$06,$00
 + .byte $09,$02,$08,$0a,$0f,$07,$01,$07,$0f,$0a,$08,$02,$09,$00
 + .byte $06,$04,$0e,$05,$03,$0d,$01,$0d,$03,$05,$0e,$04,$06,$00
 + .byte $09,$02,$08,$0a,$0f,$07,$01,$07,$0f,$0a,$08,$02,$09,$00
 + .byte $06,$04,$0e,$05,$03,$0d,$01,$0d,$03,$05,$0e,$04,$06,$00
 +</code>
  
base/rasterbars_small_source.txt ยท Last modified: 2015-04-17 04:33 (external edit)