Ram Tester for vintage CBM Computer RAM Chips (most RAM commonly used in C64 / C128 / A-500 & A-2000).
If you like this little project, you can make a small donation via the SPONSOR button in the top menu bar. To give you an idea, I have spent approximately:
- $100 in materials, including various tests and failures.
- 60+ hours to get the code working.
There is a short YouTube video demonstrating the tester in action. (Note: the current version no longer requires an adapter for ZIP but includes a built-in ZIP socket):
This is a hobbyist project. There is no warranty of any kind, and usage is at your own risk. By using any information provided here, you agree to these terms. Please read the license.
I decided to create a tester to diagnose some of the common DRAM chips used in CBM computers from 1980 to 1990.
- Fast! All tests complete within 10 seconds.
- Complete! Tests include retention checks as well as column/row crosstalk.
- Simple! Build it yourself for roughly $20–30, or get one directly from me. (Sales thread on AmiBay).
- Safe! A built-in fuse protects the tester, and a ground short check detects internal RAM shorts.
Documentation:
The documentation has been moved to the WIKI section of this project.