Tandy Color Computer 2 Repaired

Using the logic analyzer to track down the problem.

[@d.j.peters]

The good old HP1631D in action cool 🙂

[@MartianTech]

It prefers the term "venerable" :)

[@douro20]

Time to get a disk interface on it so you can run OS9.

[@emuhill]

So basically it was that 6822 chip after all. What did you do swap it for another chip? I do believe that evil company at the time this version of basic came out was in Albuquerque.