commodore plus/4

Apr 25 2024

On "repairing this commodore 1551 drive" and "don't plug in the head cable backwards"

Adrian

I bought a "dead" 1551 drive a few months ago. It's a european model, only 220v, and they said "it smoked when it was on". Well, i figured it was dead but I figured maybe not dead dead.So, step one was removing the .. huge ass transformer.I stripped off the regulators and hooked it up to a pair of...

commodore 1551 drive 6510t commodore 16 commodore plus/4

Jul 12 2022

Fixing a third commodore plus/4, or "god damnit adrian stop it"

Adrian

Here's a fun and easy one to fix.One commodore plus/4. Here's what it displayed.Looks like the TED chip is outputting something, but it isn't setup right.So I pop it open. There's the right clock on pin 1 of the CPU - switching between 1 and 2MHz as it does. Ok, so let's check the ICs.Hm, there's...

commodore plus/4