krzysiobal wrote:
ADC-CLK = Probably non-combinatorial
ADC-!CS! = Probably non-combinatorial
Given prior evidence, those should both latch the values written to the $80s bit at $C003 and $C002 respectively.
Quote:
ADC-D
I'd have thought there should be some way for the CPU to drive this node high ; the ADC requires that the first bit that's clocked into it be high (and, given how this is wired, also the 2nd bit).
Quote:
CPU-D7 Probably non-combinatorial
That's more surprising to me. As far as I can tell, it should "just" relay the value from ADC-D when (address&$E003)==$6003 (and be hi-Z otherwise)
Quote:
REG-CLK = (CPU-A1) | (CPU-A0) | (CPU-R/!W!) | (CPU-!ROMSEL!) | (CPU-A14) | (CPU-A13);
adr 1000000000000000 0x8000
mask 1110000000000011 0xE003
We know for certain that the later revision of this hardware also cares about A2 and A3 ... much to my surprise.
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