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6809 attempt
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ORG $4E21 | |
LDX #$600 ; Screen base address | |
LDB #$00 ; | |
BOX LDA #$FF ; | |
STA ,X ; | |
LDA #$81 ; | |
STA 32,X ; | |
STA 64,X ; | |
STA 96,X ; | |
STA 128,X ; | |
STA 160,X ; | |
STA 192,X ; | |
LDA #$FF ; | |
STA 224,X ; | |
ADDB #$01 ; | |
ABX ; | |
CMPB #$10 ; | |
BLE BOX ; | |
RTS |
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