18 lines
256 B
Text
18 lines
256 B
Text
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LDY #0
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LDX #20
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LOOP:
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LDA $FE ;load a random byte
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BMI LOOP ;IF GREATER THAN 7F, ROLL AGAIN
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CMP #$21 ;ASCII CODE FOR !
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BCC LOOP
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CMP #$5C
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BEQ LOOP ;NO \
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CMP #$60
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BEQ LOOP ;NO `
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;else, must be a good character
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STA $0200,Y
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INY
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DEX
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BNE LOOP
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BRK ;end program
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