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While doing some experiments with BCD arithmetic corner cases I have noticed that the V flag isn't handled properly on the 030 -- it shouldn't be involved in the calculation (contrary to the 68000). I can't test how it performs on the 020, most likely the same, i.e.
xBCD_KEEPS_V_FLAG
should be changed to2
after confirmation.Tested & implemented on Hatari's
cpu/gencpu.c
and backported by hand, I hope I didn't miss anything. Tested on all possible combinations ofZ
,C
and both byte operands (2 * 2 * 256 * 256 tests).