IBM 5110 (5100) schematics ?

Mike Katz bitwiz at
Thu Mar 17 12:04:55 CDT 2022

My fathers office was in the same building as IBM in Harrison, NY in the 
70's.  I was able to play with a 5110 when I visited his office.

I would love to get my hands on one but I can't afford it with the 
PDP-8/E money pit that I have 😵.

On 3/17/2022 11:26 AM, Brent Hilpert via cctalk wrote:
> 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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