On Sun, Jun 10, 2018 at 3:22 PM, Gerrit Heitsch <gerrit@laosinh.s.bawue.de> wrote: > On 06/10/2018 03:03 PM, Francesco Messineo wrote: >> >> On Sun, Jun 10, 2018 at 2:49 PM, Clockmeister >> <clockmeister@internode.on.net> wrote: >>> >>> I know nothing of such things, but would it be easier and cheaper to >>> simulate a 6526 using an Atmel controller(s) of some kind? >>> >> >> probably the best thing would be re-creating a clone of the 6525 in a >> MAX7000 (5V series) CPLD. I can help (but I haven't a lot of spare >> time) if anyone likes doing that. > > > Might not be possible since the 6525 has NMOS output drivers which allow you > to do things that you can't do with CMOS output drivers. Namely having 2 > outputs (one LOW, one HIGH) directly connected. if this "feature" has really been exploited, then it could be probably emulated with open drain outputs or other "tricks" (like series shottkys) but it really depends if and how it's used. FrankReceived on 2018-06-10 16:01:37
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