Commodore C64, C64C - Diagnostic Test Harness. This includes user port test, keyboard test, serial port test, cassette and control ports test. The User port test unit also incorporates a 5 Volt meter,  9VAC, 5VDC test points and indicator LED's. The Cassette port includes indicator LEDs for sense and motor lines. This is Compatible with 588121, 586220++/*,  and  785260 diagnostic software.  This will also work with C128 and SX-64 however   the keyboard tester is not compatible with these models. This set does not include the test Cartridge, please see my other listing for a combined version. The colours of the cables will vary depending on stock. The test harness should only be used with 586220, 588121 and 785260 diagnostic software. This item will be posted the next working day. Delivery times are stated in the postage and payment tab and will be posted with tracking. Delivery times are estimated due to current world circumstances. Please check out my other items Please ask any Questions C64 Diagnostic Test Harness Only