IBM 5110 (5100) schematics ?

Brent Hilpert bhilpert at
Fri Mar 18 15:11:50 CDT 2022

On 2022-Mar-18, at 1:31 AM, Christian Corti via cctalk wrote:
> On Thu, 17 Mar 2022, Brent Hilpert wrote:
>> Does anyone have or know whether the schematics for the IBM 5110 or 5100 are available?
> No, there are no schematics, only block diagrams. I had created the schematics for the Async/Serial I/O card years ago (it's a TTL only board)
>> And the tightly related question of whether anyone has done ROM (ROS) dumps?
> Yes. I've described the procedure a couple of times in the past ;-)
> And FYI, I have also written a 5110 emulator. And I also have reverse engineered the opcodes (at a time where the 5100 MIM was not available online).
> Everything (ROS listings, dumps, emulator etc) is on our FTP server as usual. You'll also find my Kermit program and Infocom interpreter there, both written in PALM assembler.

Thanks, found the directories and disassembly files, I'll forward this on.

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