On 06/11/2014 05:29 PM, Rainer Buchty wrote: > On Wed, 11 Jun 2014, Gerrit Heitsch wrote: > >> External test equipment can use this feature to test internal CPU >> logic and I/O. A program can be loaded into RAM allowing the contents >> of the instruction ROM to be dumped to any port for external >> verification. > > To me that -- optimistically -- confirms the "ROM-only" theory, although > admittedly the wording is very vague. No matter how, you will still have to return RESET to +5V before you can read and dump the ROM. :) > > I'm already suprised to see the "apply 10V to reset" hint there. > Usually, such information is not publicly disclosed. That depends on the target audience for the datasheet of course. >> To really know what's going on one would need a die shot. > > Or be brave :) Not sure, how much /1 supply there's left, though. I don't have a spare keyboard controller though... > As time allows, I'll try my luck with the 6500/11 I have ... In that > very case I might even be able to see the external memory strobe come to > life (which the /1 doesn't have). Do you have a datasheet for that one somewhere? Gerrit Message was sent through the cbm-hackers mailing listReceived on 2014-06-11 16:02:17
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