For the Commodore, C64, C64C, C128 - Diagnostic Test Harness. This includes user port adapter, keyboard adapter, serial port adapter,  cassette and control port test. The user port test unit also incorporates a 5 Volt meter,  9V AC, 5V DC 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 C128D and SX-64 models however   the keyboard adapter and cassette adapter 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. Please check out my other items Please ask any Questions C64 C128 Diagnostic Test Harness Only