incorrect ADD IX,IX and ADD IY,IY

suzukiplan / z80

Single header Z80 emulator for C++ (C++11 or later)

MIT License

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Closed suzukiplan closed 2 years ago

suzukiplan commented 2 years ago

When ADD IX,IX or ADD IY,IY are executed, the result of HL addition is set to IX or IY.

ADD IX, IX ... IX = IX + IX
ADD IY, IY ... IY = IY + IY

ADD IX, IX ... IX = IX + HL
ADD IY, IY ... IY = IY + HL

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