Commodore 64 / 128  Multirom Diagnostic Test cartridge 586220 and others based on Versa64Cart and Harness boxed. 


A full test harness is included to test Keyboard port, Serial Port, User port, Tape Port and Joystick ports. Keyboard dongle  only for C64.

This Harness only works with 586220, 4.1.0 and 785260 (1, 3 & 8). Other tests may need a different harness to perform a full test and will give BAD on some tests.

Based on Peter Schepers schematic  https://ist.uwaterloo.ca/~schepers/diagnostic.html

Translucent Blue Hammond boxes and extra flexible blue cable (see first picture) very helpful to avoid touching PCBs with fingers and cause ESD.

Led on user port dongle.

Multirom boxed cartridge with 8 roms (based on  https://github.com/bwack/Versa64Cart )

High quality ENIG PCB for the cartridge, Gold Fingers with Beveling for easy insertion and durability.


  1. C-64 DIAGNOSTIC REV 586220++
  2. C-64 DIAGNOSTIC
  3. C-64 DIAGNOSTIC REV 4.1.0
  4. 64 DOCTOR – KEYBOARD TEST
  5. ROSMOLLER C64 DIAGNOSTIC
  6. 1541 DIAG – WORLD OF JANI                     
  7. C-64 DEAD TEST REV 781220
  8. C128/128D DIAGNOSTIC REV 785260                 


You can choose the cartridge with DIP switches and switch.

Included also the DEAD TEST that other multi-ROM cartridges does not have. Very useful if your C64 wont boot, no need for more cartridges to diagnose your C64.

The EEPROM (W27C512) is in socket so you can change the programs on it if you have an EPROM Programmer.

Works on PAL&NTSC computers.

If you want buy more items I can combine shipping cost, contact with me before paying, up to 500g free shipping.

ECONOMIC SHIPPING TO FRANCE, GERMANY, LUXEMBURG, BELGIUM & NETHERLANDS,  WITH MONDIAL RELAY / InPost /HERMES
Your parcel will be dropped off at the closest Point Relais/Hermes paketshop, please send a message with your choice.
Also available for Spain, Italy, Portugal and Austria, contact for exact price.