On Wed, Feb 22, 2017 at 9:11 AM, Gerrit Heitsch <email@example.com> wrote: > On 02/21/2017 09:56 PM, smf wrote: >> >> This thread has a schematic >> >> >> http://www.lemon64.com/forum/viewtopic.php?t=56301&postdays=0&postorder=asc&start=15 >> >> >> It looks like he did alot of testing and had to change a few things each >> time he hit a problem. > > > Yes... And he still uses /CASRAM as /CS without OR with /RAS. That is not > stable, he can only get away with it since he uses such a slow RAM (100ns), > but it's not guaranteed to work in all instances and PLA versions. > > Also, I don't quite understand what he was doing with the diodes and using > anything but plain MA0-MA7. If you use those, you can make a plug in module > for the RAM without needing any other signals (despite what was being said > in the thread) I also didn't get why he needed a '245... but as I didn't try myself (and I'm not going to try), I stop arguing. Frank Message was sent through the cbm-hackers mailing listReceived on 2017-02-22 09:01:11
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