E on 6821 = phi2 6520 even a 6524 probably works as a replacement of 6520 :) or a bulgarian CM602 :) On 02/02/2017 16:03, Francesco Messineo wrote: > Looking at the datasheet, it appears that pin25 of the 6821 is called > E (enable) and on 6820 is the familiar phi2 or pih0. Timings look > compatible (but I didn't quite read all the datasheets), so I might > give it a try and see what I get. > > On Thu, Feb 2, 2017 at 3:58 PM, Gerrit Heitsch > <gerrit@laosinh.s.bawue.de> wrote: >> On 02/02/2017 03:18 PM, Francesco Messineo wrote: >>> I've spoken too soon :( >>> Swapping the 6520s gives no cursor and no keyboard input, so I think I >>> have to find a spare PIA (or design my own PLD version, if I want to >>> spend some months of spare time doing it). >>> Does anyone have a 6520 I can buy? >> >> I read somewhere that you can also use an 6821, but I'm not 100% sure. Can >> anyone confirm or deny it? And if deny, what are the differences? >> >> Gerrit >> >> >> >> >> 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 2017-02-02 16:01:47
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