Chip Tester

(3 customer reviews)

$129.00 USD

The BackBit Chip Tester ups your game with vintage computer diagnosis and repair. Tired of playing a guessing game with swapping chips? Don’t want to risk putting bad chips in a good machine (and vice versa)? Want to do as little desoldering as possible? Then the BackBit Chip Tester is your solution.

In stock



See complete documenation here.

  • Designed for use with the Commodore 64, but capable of being expanded to other hardware with firmware upgrades;
  • Diagnoses chips in-circuit to help you decide which chips to desolder;
  • Diagnoses loose chips to save you from purchasing unnecessary replacements;
  • Pays for itself when it helps you rescue a machine you’ve given up on;
  • Deduces problems with integrated circuits, making it much easier to narrow down wiring problems and corrosion;
  • Supports testing 5V logic of chips in the Commodore 64 (and some related machines);
  • Capable of “ripping” ROM chips to Micro SD card (card not included);
  • Sturdy “sandwiched” PCB case with 3D-printed buttons and standoffs;
  • The same quality of technical support you have come to expect from the BackBit cartridge.

About in-circuit testing:

  • Test clips and jumper wiring are not included (you must purchase 3M or similar 0.3″ and 0.6″ width DIP IC clips with minimum pin count for the chips you want to test);
  • If you use a larger clip that overhangs a chip, the tester can be configured to test at different vertical offsets;
  • For easy writing, ONE CLIP ADAPTER IS INCLUDED to attach the clip to the tester’s socket (can purchase additional clip adapters here);
  • WARNING: DO NOT USE for in-circuit testing while machine is PLUGGED IN, as this can damage the tester permanently.

Accessories included:

Optional accessories available for purchase:

Recommended accessories to test in-circuit (not sold by BackBit):

IC Test Clips (this is the minimum set to be able to test nearly all chips in the C64 easily)
*make sure you do not get “nail head” clips as those don’t attach to jumper wire
*if you get a 24 or 28 pin clip, make sure to get the wide one, i.e. 0.6″ width
*these are much cheaper used or new old-stock on ebay

Jumper Wire
* use male/female extension wire; any square pin wires with 2.54mm spacing should work;
* best to get configurable-sized headers like these, as single pin jumpers tend to get jammed with so many in a row; you just use a few of these for each side of the junction, i.e. 2x 10 pins for the 20 pin clip, 4x 6 pins for 24 pin clip, 4x 10 pins for 40 pin clip, or other combinations will work: or

Additional information

Weight 10 oz

3 reviews for Chip Tester

  1. David Ziegler (verified owner)

    Got mine today!! Serial number 17!! Looks to be a fantastic piece of kit! Seems to be quality everywhere on this device! Did some test and the results are proper. What a fantastic device!! Thanks for creating this! Now I just need to get some test clips and test that piece.
    Thanks So Much Evie, you are awesome!!

  2. Dan Goswick (verified owner)

    Got Serial number 1! I really like the quality and effort put into this product Evie. Great job! I’m excited about the potential to add many more chips from other systems. It would be cool if there was an easy way for us end users to set up test scripts. Nice work!

  3. Raj W (verified owner)

    Serial number 62 (so close to 64! haha!) Very easy to setup and makes chip testing a breeze! The results are clear and accurate. Thank you for making this Evie!

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