Commodore 64 Diagnostic harness

I’m a geek, you’re a geek, we’re all geeks.

And Geeks often build their own geeky tools.

One of the most powerful hardware debugging tool for a non fully functional commodore 64 is the C-64 Diagnostic Assembly Kit (CBM 326070-01) – this software is powerful because it pokes at hardware using a test harness.

Today’s article will discuss how to come up with a hardware test harness solution for that Diagnostic cartridge.

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What is a Commodore 64 Magic Desk Cart ?

We recently demonstrated how to build a Commodore 64 cart. This was the basic cart as originally planned on the Commodore 64, but at some point they started to develop larger-than-anticipated carts with multiple different standards; one of which is named Magic Desk.

Today’s article will discuss this standard, how it came to be, and how to build such a cart.

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