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Old 5th Feb 2021, 1:16 pm   #490
ScottishColin
Octode
 
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,807
Default Re: Non-working Commodore PET 3016

Quote:
Originally Posted by SiriusHardware View Post
Thanks for that, Mark.

I've actually ordered a Mega clone myself - been needing an excuse for a while, plus some of those FET based level shifters which I had not actually seen before.

As well as the task of verifying the PROMs, is there anything more we can suggest looking at on the purely electronic side? The lack of activity on either side of the data bus buffers sounds strange, as does the odd signal on what should be the data buffer 0V pins (pin 10 of each IC).
fyi - I've just ordered the level shifters and the Arduino too as I like to experiment.

My intent is to use the Pi to examine the ROM as I'm more familiar with that but it's probably time I did something Arduino.

They turn up on Monday so nothing doing over the weekend with the ROMs.

Colin.
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