On 03/04/2018 07:31, Baltissen, GJPAA (Ruud) wrote: > I beg your pardon but isn't this a bit far sought? What about > piggybacking a 6526 on top of an existing one? With a 74LS139 you can > either demirror one of the existing 6526s, VIC and/or SID. (Or use IO1 > or IO2 to address it but then you'll lose some functionality). > The biggest advantage of this solution IMHO: there is only one CPU you have to program for, thus only one source of possible trouble. You lose that mirror address, so you could end up with compatibility issues. Plus you can't just unplug the rom and insert the module, you have to do other work.Received on 2018-04-03 11:00:03
Archive generated by hypermail 2.2.0.