For technicians maintaining legacy industrial control systems or other hardware to the retro-computing enthusiasts, the RAMCHECK INN-8668-2-A 30 & 72pin SIMM Adapter is the holy grail of diagnostic hardware LOL, Not Really holy grail but highly sought after. This adapter is Capable of testing both 30-pin and 72-pin SIMM modules, this rare adapter is essential for verifying legacy (Vintage) RAM, but acquiring one today is a major hurdle. Single Adapters are virtually unobtainable, typically locked behind complete RAMCHECK bundles (As This Was) These bundles are priced anywhere from $1000 to $1,500 or More.
Don’t Forget to See My RamCheck Teardown, Firmware and Software Archive
Ramcheck is No Longer in Business they no longer sell these so To bridge this gap for the repair community, I am taking a complete hardware reverse-engineering approach tracing the pinouts, X-rays help with that I will be creating a modern open reproduction adapter.
Ramcheck INN-8668-2-A SIMM 30 & 72pin SIMM Adapter Cover Removed
The Cover to the PCB is a PCB It Self. The Plastic Image is delaminatinng.
Ramcheck INN-8668-2-A SIMM 30 & 72pin SIMM Adapter Circuit Board Top Side
This Adapter has a 24WC04 Eeprom (Backup)
|
There are also a few PI5C3257Q Multiplexer/Demultiplexer U1 U2, U4
Ramcheck INN-8668-2-A SIMM 30 pin & 72p in SIMM Adapter PCB Bottom Side
X-Ray Sample Low Res Tease… Full Size Not For Public Release Yet! Sorry.
This Was Another Expensive Item, So If this Site Helps You or If You Like What You See, and/or You Just Want to Support My Blog Please Donate via Cash App $slrhine, or Amazon Wish List Gift
Last Updated on September 27, 2026 by Steven Rhine