Max out your IBM PS/1 (2011 or 2121) memory with this RAM Expansion!!!
Designed by TrilobytESRetro in Spain
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We have used modern EDO RAM chips to provide an extra 2Mb to IBM PS/1 2011 and up to 4Mb to IBM PS/1 2121 (these are the maximum RAM upgrades for these models via the front RAM expansion port). The b…
Read More…We have used modern EDO RAM chips to provide an extra 2Mb to IBM PS/1 2011 and up to 4Mb to IBM PS/1 2121 (these are the maximum RAM upgrades for these models via the front RAM expansion port). The board plugs in at the front, in the proprietary RAM expansion slot of the IBM PS/1 2011 or 2121 (see video below).
A solder bridge in the board allows you to configure it as 2Mb for IBM PS/1 2011 and 2121 or as 4Mb for 2121 only (see last photo with the jumper configuration).
Development thread available at VaDeRetro forum (in Spanish): https://www.va-de-retro.com/foros/viewtopic.php?t=10805
The board comes fully tested in anti-static bag with NO brackets and it works on both IBM PS/1 2011 and 2121 (see the last photo for Jumper configuration)
You can grab the 3D model to print the brackets here: https://www.thingiverse.com/thing:5036644
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