C64/C128 Diag Harness
The C64/C128 Diag Harness harness is a full test harness to be used with a 586220 (c64) or 785260 (c128) diagnostic cartridge.
This test harness is based on Sven Peterson's design.
Our full harness kit comes with:
- User Port Module
- Cassette Port Module
- Serial Loopback
- 2 Controller Port Connectors
- C64 Keyboard Dongle *
- All Needed Cables
Every component comes in a 3D printed case to protect against ESD and comes with vinyl labels for proper identification.
* If you want to use this with a C128 diagnostic cartridge and want to test the C128's keyboard then you will require a keyboard dongle that is specific to the C128 line of machines (C128, C128D and C128DCR).*
Our harness will work with the C128 line of computer but due to the keyboard connector being different on the C128 and C128D, you will require a different keyboard dongle. You can pick one up here.**
When paired with the C64 Diag or the C128 Diag cartridge, the test harness provides the needed feedback to accurately test all of the I/O connections on your C64 or C128.
Connect all modules to their appropriate ports and then turn your Commodore 64/128 on with the appropriate cartridge plugged in.
Please refer to the original support manual below on how to diagnose any failures that might be reported by the diagnostic software.