Troubleshooting C64 PLA chip replacement (ezPLA) using an Arduino logic tester and logic analyzer. Video is sponsored by ​PCBWay: https://pcbway.com

This video shows the process of troubleshooting a PLA replacement retro chip (ezPLA) by first checking the logic table using an Arduino tester and then diving deeper to solve the problem with a logic analyzer.

Arduino PLA logic tester: https://github.com/marekl123/ArduinoPLATester

Video contents:

0:00 Introduction 0:51 Video summary 1:12 First attempts 1:37 Explaining 74HC595 2:13 Arduino logic tester on a breadboard 4:13 C64 PLA dissected 5:19 74HC595 circuit explained 6.23 Explaining Arduino code 10:28 Testing ezPLA and PLA chip using the Arduino circuit 11:40 Timing of PLA chip explained 12:49 Connecting logic analyzer for further tests 14:14 Fixing the delay problem of ezPLA 16:17 Testing inside Commodore 64 16:35 Next steps

ezContents blog website: https://ezcontents.org

Twitter: https://twitter.com/ezContents