UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Non-working Commodore PET 3016

SiriusHardware · 28th Jan 2021, 2:19 pm

You might want to avoid shorting any two pins together, accidentally or otherwise.

High or mostly high on pins 4 and 6 are to be expected, pin 34 (r/w) I would expect to see some activity on, but mostly high. The voltage measurement of 3.6V there suggests that it is active, but spending more time high than low. However your scope trace seems to show it completely inactive.

Any activity on higher up address lines A3-A7? (12,13,14,15,16?).

28th Jan 2021, 2:19 pm	#288
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,577	Re: Non-working Commodore PET 3016 You might want to avoid shorting any two pins together, accidentally or otherwise. High or mostly high on pins 4 and 6 are to be expected, pin 34 (r/w) I would expect to see some activity on, but mostly high. The voltage measurement of 3.6V there suggests that it is active, but spending more time high than low. However your scope trace seems to show it completely inactive. Any activity on higher up address lines A3-A7? (12,13,14,15,16?).