Does anyone happen to know the pinout of the custom chip on the Capcom CPS1 'C board' please? Specifically I'm curious what pin 1 does. I guess all of the various custom chips use the same pinout?
It seems pin 1 of the 'CPS-B-21' (and all others I think) is tied to pin 69 of the 'CPS-A-01' on motherboard.Signal is called 'XSEL' on the 'CPS-A-01', I guess it's some enable signal for horizontal scrolling (so it should be an output from 'CPS-B-21')