Sure, you can use C64 diagnostic cartridges on your 128, but all you are really checking are the com..
This is an add-on to our C64/C128 Diag Harness. The C128 and C128D have different keyboard connector..
The Diag Harness is the ultimate add-on to the Dual Diag, C64 Diag and C128 Diag cartridges (it..
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