![]() In the schematic I see pin 36 of the ZIF socket connects to pin 16, but in the adapter diagram this does not show a test purpose. In the schematic I see pin 19 of the ZIF socket connects to pin 69, but in the adapter diagram this does not show a test purpose. I note that BE is on pin 6 according to the adapter diagram, but I see no control of this from the schematic (just a pull-up). The diagram of the adapter shows SS_BI on pin 73, but the schematic shows this pin going to pin 77 of the 84 pin PLCC device. In other words perhaps pin 35 is AD0, rather than pin25 ? I now also note that pin 21 of the ZIF connects to SS_BI (waveform is the same as SS on the 7032). ![]() It could be the picture of the pin out of the EPM7064 which is incorrectly labelled. Pins 1 to 8 map to ALL03 register "E0" and was used for the ADDR bus on the EPM7064 and I would assume that this was not changed for the EPM7064. ![]() ZIF pins 1 to 7 were AD0 to AD6 for the EPM7032, but once I had mapped the pins, I saw that AD0 of the EPM7064 was not connected. SEE BELOW (the adapter diagram could be incorrect ?). It is labelled pin35 (not apparently used for programming), but I think that it should be pin25, which is AD0. PLEASE SEE BELOW, this was written before thinking more fully (sorry!). I think that pin 1 of the ZIF is incorrect. I have been looking at this schematic and using it to try to emulate the epm7064 in my DOSBOX-X code base.
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