> Matty_ > > thanks for Info, can you tell me in which part of MAME is the byte-at-a-time PIO > transfer being made? > > Thanks for your help!
The CPS-3 BIOS code is programming the WD33C93 to do it. This is the advantage of low-level emulation: we don't know what the ultimate behavior is going to be, we just have to enable it.
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