I checked pins 2, 19, 5, 16, 6, 15, 9 and 12 on UF9 with the chip out.
All are zero with no waves, with the exception of pin7 which goes to 2V steady (checked with a meter).
Colin.
Quote:
Originally Posted by SiriusHardware
That's good, and that's where we benefit from the knowledge of the other PET owners past and present - I would not have known to expect that pattern, and there it is.
With UF9 out, power on, look on the SD0 to SD7 inputs to that chip (on the socket) to see what the data lines look like now that UF9 is out of circuit. Are they still all steady-state or do you see activity on those now?
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