L'effet de redondance Raster sur Commodore 64

[@igork3522]

Great video. Thank you.

[@johnhendrick8794]

💯👍👏

[@Commodoreretro-programming]

Et voici le code *=$C000 SEI LDA #$7f STA $dc0d STA $dd0d LDA #$35 ; deactivate KERNAL+BASIC STA $01 DEFAULT ; DEFAULT VALUES LDX #0 ; color code for black LDY #06 ; color code for blue LDA #51 ; starting ligne number 51 for rasterbar ; ou 256+51=307 START BIT $D011 ; must wait raster beam's position be BPL *-3 ; on $D012=0 and bit7 $D011=0 BIT $D011 BMI *-3 CMP $D012 BNE *-3 STX $D020 ;STX $D020 STX $D021 ;CLC ; Carry set if branch not taken ; (if A=Memory) ADC #5 ; add 6 actually CMP $D012 BNE *-3 STY $D020 ;STY $D020 STY $D021 ;COMPUTE NEW_RASTER_LINE ;SEC Carry is set as branch not taken ;(A=Memory) SBC #5 ; subtracts 5 actually CMP #246 BCC @no_default ; A equals 246 or less ;LOAD_DEFAULT_VALUE LDA #51 @no_default JMP START