Hi, When I was using this board, I never saw the extension But some people told me it was for a numeric processor I checked in the chip of this epoch and found the AMD 9511 http://www.cpu-world.com/CPUs/9511/index.html 24 pins Vcc on pin 2 Vss on pin 1 No idea if pin 3 of am9511 can be tied to gnd Any idea ? is it compatible with what you can see on the board ? -- didier -----Message d'origine----- De : email@example.com [mailto:firstname.lastname@example.org] De la part de Mike Naberezny EnvoyÃ© : lundi 23 novembre 2009 21:38 Ã€ : email@example.com Objet : Re: info cpm board for cbm 8032 Hi Ruud, Ruud@Baltissen.org wrote: > The unpopulated socket is meant for a 6502. As the you can see there > is no EPROM onboard. The unpopulated 24 pins socket is NOT meant for > an ERPOM. Pin 1 and 3 are connected to ground, pin 12 isn't. Pin 2 > is connected to +5V, pin 24 isn't. I have no idea at all what could > fit there. That is a strange pinout. I thought that perhaps the socket could also be for an Intel or Zilog peripheral chip. However, I wasn't able to find one that matched the pins you listed above. The board in Dave Dunfield's photo also has the same empty socket. It could be for a proprietary expansion. This is also a little strange. I would think that any expansion would use headers like the others on the board rather than a socket. Regards, Mike -- Mike Naberezny (firstname.lastname@example.org) http://6502.org Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2009-11-25 08:30:25
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