That's a System/23 Datamaster. I, personally, have made reverse-engineering of the board and wrote a MAME driver. If you need assistance bringing it up to work just tell me.
That being said, from the pictures I can say the following:
\* It has 16 system ROMs. So a late 5322 or a 5324.
\* No DRAM card. We are working on a contingency for cases like this.
\* European motherboard, as it has two oscillators.
\* No jumpers on the configuration pins. I should take a look into what it does mean both in the service manual and the driver I wrote
\* No keyboard. We are currently working on a contingency, although I was able to trick the motheboard to think it has one.
\* No floppy disk controller card. If you manage to get it working, you won't be able to load or store programs other than typing them. The FDC card still needs reverse-engineering work.
Oh, and another thing. Dump the ROMs ASAP. The ones the System/23 carries are very, very nasty. They are the main cause of failure for this class of computer, other than RAM capacitors.
Finally, again I extend my hand to you. If you want to make it work send me a DM. I will put all the available resources I can, but only if you are willing to deal with the maintenance work yourself.
Thank you, but I am not. I consider myself just a bit better than an amateur in electronics - I really have difficulties with analog. On the other hand, I find digital easy.
I was able to thrive enough with this particular computer because there wasn't enough general interest in it, unfortunately. However, seeing the disarray wasn't enjoyable, so I decided to study and document it. Sharing the data I was obtaining is just restorative justice to the computer and the team who designed it.
Key Features of this Board
Processor: It was designed for the Intel 80286 processor, a 16-bit CPU that offered significant performance improvements over the earlier 8088-based PC and XT models.
Expansion Slots: The board features several 16-bit ISA (Industry Standard Architecture) expansion slots, which are the longer black connectors visible at the top left.
Memory: It could address up to 16 MB of memory, compared to the 1 MB limit of its predecessors.
Connectors: The distinct red connector and the various socketed chips are typical of IBM's early mid-80s hardware design.
Wikipedia
Wikipedia
This is what Gemini finds ... The board in the image is an IBM PC AT 5170 System Board, manufactured by IBM.
I had respect for Gemini… ISA AT slots are a combination of the ones on top left with the ones at top right : but inline not separated.
I understand why he think it was a AT motherboard
When someone asks a group of people (like a subreddit) a question, I think it's borderline rude to regurgitate an AI answer at them. Especially when it's wrong. If they wanted to ask Gemini, they would have bloody asked Gemini.
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