Martin Donlon @wickerwaka.com · Nov 12 It's loading a byte from a lookup table, multiplying it by some value and dividing it my a constant. There is always the chance of some weird hardware-specific edge case in something like a multiply/divide but that wasn't the problem here.
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The problem is the `xch aw,cw` which is swapping those two registers. It's basically a no-op in this case because those two values are going to get multiplied together in the next instruction anyway and the order doesn't matter.