From: Nicolas Welte (welte_at_chemie.uni-konstanz.de)
Date: 2002-04-17 16:14:52
Professor Dredd wrote: > 4,5,6 = Address Control: > - 4,6 selects $DE00 (default) > - 5,6 selects $DF00 > > > > Use a C128, and put the T232 to $d700, I think this is > > even described in the > > I have no idea how to accomplish that. It's not covered in > the T232 documentations and, as you can see, all the pins > 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 you run a wire from the correct pin to the T232 cartridge. It looks like pin 6 from above chart would be the correct choice :-) Nicolas Message was sent through the cbm-hackers mailing list
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