Thanks, it's what I thought but I was not sure... I was thinking to rebuild an eprom programmer for the cbm 8032 to reprogram the 2532... (in fact adapting one for SYM 1) On 09/11/2016 21:42, André Fachat wrote: > It's even worse. The high active chip select lines of at least the VIA > and PIAs are simply connected to address lines A4, A5 and A6 (and CRTC > maybe to A7). This creates the known addresses $e81x, e82x and e84x. > The only problem is that if you access a combination like e83x you > access the two PIAs in this case at the same time! You can easily > write to multiple chips like that, but you create bus conflicts on read. > > So, as summary, you can't use the gaps between the chip address ranges > for your own stuff. > > I've seen module space in $9xxx or $Axxx for this > > Regards > André > > > Am 9. November 2016 21:30:36 schrieb didier derny <firstname.lastname@example.org>: > >> Hi >> >> Is there any solution to use in area between $e800-$e8ff to add extra >> chips ? (PIA / ACIA) ? >> >> is the decoding partial and standard chips shadowed or any free >> places ? >> >> -- >> didier >> >> >> >> >> Message was sent through the cbm-hackers mailing list > > > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2016-11-09 21:02:04
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