Re: A83: Negative or positive?
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Re: A83: Negative or positive?
I sit corrected...
David Phillips wrote:
>
> It's 'rla', not 'rra', I made a mistake there. But this isn't 6502.
> Loading the accumulator does NOT affect the flags. You could do an 'or a'
> or an 'and a' which would set the flags based on the value of the
> accumulator, but then you'd still have to use an absolute jump, since
> relative jumps only have conditionals for the zero and carry flags. So
> you'd use an extra byte, and still have to have the byte to set the flags.
> But if you're just checking for negative, then it doesn't matter much.
> Especially if you do the load using HL, since that's only one byte for the
> load.
>
--
Scott "_Wrath_" Dial
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TimeCity AI Guy II - www.timecity.org
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