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2114 Test Jig

Inexpensive tool for testing 2114s

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Th 2114 is a SRAM chip with 1024 x 4 bits used in many computers and some video games from the late 70's to mid 80s.
As many chips from that era it suffers from aging and is rather common for an equipment that is not working because of a bad RAM chip.

There are several low cost chip programmers/tester such as TL866 but find a cheap equipment that also support the 2114 it's harder to find that the 2114 chips themselves.

A quick solution is possible though, using cheap parts that are usually available in todays hobbyist parts bin: An Arduino board and a DIL socket.

The sketch running on Arduino generates the addressing and control signals to write a given pattern at all locations of the SRAM, then do the same for reading the values back and comparing the result.
  • 1 × Arduino UNO
  • 1 × 18 pin Socket

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Dave's Dev Lab wrote 04/16/2018 at 04:24 point

cute design!

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danjovic wrote 04/16/2018 at 13:00 point

Thanks!! 

I plan to support 4164 DRAMs too, since this project was built to help me troubleshooting a TRS-80 clone whose screen was used as a project background photo. 

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