IBM 5110 (5100) schematics ?

Brent Hilpert bhilpert at
Thu Mar 17 11:26:09 CDT 2022

Does anyone have or know whether the schematics for the IBM 5110 or 5100 are available?
And the tightly related question of whether anyone has done ROM (ROS) dumps?

There are some service manuals on bitsavers, they are field-service board-level manuals, mostly step-by-step problem resolution guides, no schematics.

As a system, it's small enough to be reverse-engineered, in that regard it's tractable. However, it's implemented using IBM's mid-70s PCB and IC technology, increasing an RE effort by a couple orders of magnitude if not approaching impossible, unless one were to develop some robotic probing system and software.

There was a 5110 on ebay, non-working, that a friend had some interest in. It was quite a gamble at the price, in the absence of real tech info. ... Apparently it's been delisted, so my question is just curiousity at this point.

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