> > It's the analog "paddle" stuff, which is mapped to some oddly nonconsecutive bytes.
> > What's even more odd about that is that the ADC on the board is a MSM6253, which
> has
> > a microprocessor bus-compatible serial readout.
>
> I vaguely recall the SH2 has some kind of serial interface, sure it isn't hooked up
> to that, and the current hookup is just skipping that part?
While at least some SuperH models have an on-chip SCI peripheral, I don't recall the code configuring anything like that. It wouldn't make sense from a hardware standpoint, seeing as the SH-2 is way over on the opposite corner of the PCB from the MSM6253.
I do recall SCI or something like it being used in the Saturn for communication between the SCSP and the SH-1.
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