> > > 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.
that might be what I was thinking of then, yeah, or possible SH3 (the touchscreen on the Mahjong game?)
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