Help me determine the origin of this motherboard! Please :D IBM
Posted by DeliveryUnhappy5082@reddit | vintagecomputing | View on Reddit | 13 comments
Posted by DeliveryUnhappy5082@reddit | vintagecomputing | View on Reddit | 13 comments
Goldenyellowfish@reddit
https://www.nf6x.net/2014/09/ibm-5322-system23-datamaster-internals/
DeliveryUnhappy5082@reddit (OP)
Thank you ! You are the best !!!
Bits_Passats@reddit
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.
uburoy@reddit
You are amazing.
Bits_Passats@reddit
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.
KeyPiglet8147@reddit
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.
boblecastor@reddit
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
Bits_Passats@reddit
No. The small slots are for DRAM memory cards only. As you can see, there's no RAM in the motherboard.
Bits_Passats@reddit
This is not even a PC. Look, it doesn't even has RAM on it.
bonzog@reddit
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.
Plaidomatic@reddit
Did you use your own eyes to see how this could not possibly be an AT? Or did you post this to show how wrong Gemini, and by extension you, could be?
Away-Ad-3407@reddit
she’s a beaut clark!
melk8381@reddit
Fuckin tasty!