For sale is a Commodore 64 Dual Dead Test and Diagnostic Cartridge, plus full test harness.

Now updated with 8 diagnostic ROM's which include:

- 586220+

- DeadTest 781220

- 1541 Diag

- C64 Diag

- C64 Diag 4.1.1

- C128 785260

- Doktor 64

- C64 CBM Burn-in Test

The 586220+ diagnostic cartridge and test harness allows testing of:

Keyboard port
Serial Port
User port
Cassette Port
Joystick ports
RAM/PLA/ROMs/Sound/Integrated Circuits

The PCB's/test harness is based on the design from the original test harness design as used by Commodore back in the day.

I have only tested this on Commodore 64 25407 PAL version, but I do not see why it will not also work on the NTSC version.

Usage Instructions:

Never plug/unplug any parts with the computer turned on. You will most likely fry something!

Please follow the instructions carefully. The cartridge and test harness have been tested 100% but the seller will not be held responsible if you connect the PCB's up incorrectly and damage your Commodore.

You risk damaging your diagnostic cartridge and Commodore 64 if any of the components are plugged in incorrectly.

Insert dead/diagnostic cartridge. Select jumper for testing dead test or diagnostic.
If you are doing a diagnostic test then open Commodore and remove keyboard connector. Connect the keyboard PCB to the main board. Take note of pin 1
Connect 6 pin DIN connector to serial port.
Connect PCB to Cassette Port (component side up)
Connect PCB to User Port (Component side up)
Connect cable from User port (J3) to Cassette Port (J1) header pins.
Connect 2 x DB9 cables from Control Port 1+2 to PCB.
Power up computer to begin test

To select the ROM configure the jumpers as follows:

586220+ ROM:LO, ExROM, A15:LO, A14:LO, A13:LO

DeadTest ROM:HI, GAME, A15:LO, A14:LO, A13:HI

1541 ROM:LO, ExROM, A15:LO, A14:HI, A13:LO

C64 Diag ROM:LO, ExROM, A15:LO, A14:HI, A13:HI

C64 Diag 4.1.1 ROM:LO, ExROM, A15:HI, A14:LO, A13:LO

C128 785260 ROM:LO, ExROM, A15:HI, A14:LO, A13:HI

Doktor64 ROM:LO, ExROM, A15:HI, A14:HI, A13:LO

Burn-in Test ROM:LO, ExROM, A15:HI, A14:HI, A13:HI

I am also selling just the test harness, without the diagnostic/cartridge. See my other listings.

Please contact me if you have any queries and I will be only too happy to answer them.

Many thanks for checking out my items.

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🇬🇧 Commodore 64 C64 Dead Diagnostic cartridge plus test harness 586220+ 781220

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