Appearance: Used
Functionality: Incomplete

Description:
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Similar to pictured, Commodore 314061-02 Diagnostic User Port Cartridge for the Commodore 64/128 computers. Includes just the user-port cartridge; needs the test harness and ROM cartridge (both not included) to fully function. Manual, schematics, and ROM image are available at: http://blog.worldofjani.com/?p=164.

Warranty and Returns:
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We understand that there may be compatibility issues, space constraints, or it just doesn’t look perfect. This item can be returned within 14-days for ANY reason. However, shipping to and from is not refundable.

Shipping:
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- Other shipping methods are available – contact us for details.
- Combined shipping is available for most items – contact us for details.
- Local pickup is also available at no cost.

About Us:
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The Computer Preservation Group is dedicated to the preservation of historical computers. To help fund ongoing operations, select items are made available. To learn more, please visit our website: www.computerpreservation.com. Thank you for your support!

Stock#:C20361.AH#.33


Details from http://blog.worldofjani.com/?p=164:

C-64 Diagnostic Assembly Kit (CBM 326070-01)

Rev. 586220 (c64) and 588220 (sx64)

Located at $8000 in memory and requires a harness (some tests work without the harness).
Note: There are at least 3 variations of the schematic on the net, two of them are missing an interconnected wire in the casetteport.

Cartridge ROM: C64 Diagnostic Rev 586220/588220 Cartridge (314061-01)
Manual: C64 Diagnostic Instruction and Troubleshooting Manual (314061-05)
Harness Schematic: C64 Diagnostic Harness Schematic (314061-02/03/04)

I disassembled the cartridge for studying purposes. It can be compiled(assembled) with 64tass.