IBM PCjr Part 2 NEC V20 Upgrade and Quadram expansion

Part 2 on my look at the PCjr. this time we do a small CPU upgrade as well as take a look at the uncommon Quardram expansion chassis.

Check out Part 1 here. https://youtu.be/eGX7zchOIaA ... https://www.youtube.com/watch?v=5FKZfZP2lqc