AFAIK it is not like a dead test cart for the C64, but it will allow you to run diags on many items including the CPU and custom ICs. What would be nice to find is the additional SuperSalt diag harness (It's a bit like the one I have for the ST that plugs into the various ports and tests EVERYTHING), however I may just have to content myself with the limited tests available in just the cart itself.stephen_usher wrote: ↑Mon Jan 17, 2022 10:03 am What sort of level of diags does it have? Can it run without operational RAM, for example?
This is the additional board:
And it will do tests for joystick ports, SIO and some other parts that the cart on its own won't reach. That poor board has had a hard life!