7 lines
282 B
Text
7 lines
282 B
Text
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LDA #$FF
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CLC ;clear the carry. That way, ROR will not accidentally shift a 1 into the top bit of a positive number
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BPL SKIP
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SEC ;if the value in A is negative, setting the carry will ensure that ROR will insert a 1 into bit 7 of A upon rotating.
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SKIP:
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ROR
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