On Thu, Dec 28, 2017 at 9:00 AM, vossi <vossi@ceffy.de> wrote: > The 6540 need a clock. It doesn't wok with a0 or static input. well, that's strange. How can it tell that A0 isn't a clock? Phase relationship with the other selects? Also I wonder what the clock is used for internally (other than selecting the ROM). I have looked at the only bits of the 6540 datasheet that can be found on the net, and it doesn't seem anything special about timings on phi2 input. I have already a general purpose microcontroller board that I use to read/test some "strange" memories, so I can easily modify the current firmware to add just another memory. > You can check them easy in a pet with my 2001test in $f800. that works if the PET is working enough already, but it's surely a great option Frank Message was sent through the cbm-hackers mailing listReceived on 2017-12-28 09:01:05
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