PLATester: Make a Cheap $15 IC Chip Tester for Commodore 64 PLA Programmable Logic Array: DIY !

The PLATester! I show you how to build a chip tester for the Commodore 64's PLA (Programmable Logic Array). This chip is one of the most common failures in the C64. I have 1 or 2 in my collection that are bad right now, that I know of! Sometimes if there is a bad RAM IC and bad PLA, it can take some time to figure it out. I wanted a way to know quickly and easily, and I like to build gadgets like this.

00:00 Intro
02:15 HW Build
13:40 HW to SW Mapping
16:00 PLA Theory "The Transactor", William Levak
18:05 PLA Theory "PLA Dissected", Thomas Giesel
18:45 PLA Truth Table
22:45 First HW Test Program, c64_pla_tester.ino (Arduino code)
36:40 Second HW Test Program, c64_pla_tester_onebit.ino
41:55 Final PLA Tester Program, c64_pla_tester_complete_eqn.ino
44:35 A Quicker Test Program?
48:00 Code Walkabout
57:00 Archiving the Code
57:15 The Original PLA, Signetics 82S100, tested live!
58:50 What is reported if the PLA is bad?
1:03:55 WRAP-UP

Arduino ATMEGA 2560: https://www.amazon.com/ELEGOO-ATmega2...

Proto Shield: https://www.amazon.com/gp/product/B01...

30 AWG Wire Wrap: https://www.amazon.com/gp/product/B01...

Use the following link for the Arduino code for the PLATester:
https://drive.google.com/drive/folder...