Re: SSv5 + REU + T232?

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Nicolas Welte wrote:
> > are used for other functions. Perhaps it's a feature of the
> > C-128 MMU?
> 
> No, it's an extra output on the address decoder chip (LS139 probably) that
> decodes $d400 (SID) and $d600 (VDC). I think $d500 is not used, because the
> MMU decodes itself internally, and $d700 can be used for external stuff, if

$d700 is on U3 (74LS138) pin 12. $d500 is available there on pin 14, but I
don't think it would work, at least in C128 mode.

ytm

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