Fixing a Poorly C64 - Part 3: Testing the PLA

This video outlines a method for testing the custom Commodore 64 PLA chip off-board by using a TL866II+ EPROM programmer. I also fire the C64 up for the first time, and run a dead-test cartridge on it. Links to resources mentioned in the video: The blog post this relates to: http://www.breakintoprogram.co.uk/har... Sven's reference scope traces: http://tech.guitarsite.de/c64_scope.html Testing logic chips using a TL866II+:    • Testing Logic Chips using a TL866 Programmer   Using Stephen Vicker's 4164 RAM chip tester:    • Building a 4116 / 4164 DRAM Tester - Part ...   This is part of a series of videos where I try to establish a fault on a Commodore 64 I was given which does not boot, displaying a black screen. Addendum: On my blog post I've attached a link to the lgc file for the PLA test; the latest version of Xgpro (10.80) supports import and export of custom logic tests.