Old IBM Hardware indentifcation



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Old IBM Hardware indentifcation

Postby tjjohn61 » Wed Apr 04, 2018 5:28 pm

Hi All,

I found this old IBM circuit board in a trash dump by a local university, among hundreds just like it. This was in the late 70s I think, just rediscovered it in my loft. Would love to know what it is. Look at all those ICs! And wasted unused space on the PCB. My guess is it's something like a 256k RAM board. My son runs a high end game machine with 16GB ram that can fit in your palm. So doing the math, it would take several thousands of these to match that. I might be wrong, maybe it's not RAM. Kudos to whoever can identify this card. It measures 7 inches by 9.5 inches...about the size of a tablet today!

If ti's any help, the four grey IC's have IBM 52 printed on them.

Many thanks,

Tim
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Re: Old IBM Hardware indentifcation

 

Re: Old IBM Hardware indentifcation

Postby tjjohn61 » Wed Apr 04, 2018 6:15 pm

I did post this some years ago, but had no satisfactory or conclusive answers. Someone suggested it was a floppy drive controller, about the size of a frisbee back then. Anyway, I guess it will remain a mystery. Seems destined to be a museum piece...in my loft :mrgreen: I wonder if a can get any money for it on eBay! Maybe enough for one coffee at Starbucks!
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Re: Old IBM Hardware indentifcation

Postby enrico-sorichetti » Wed Apr 04, 2018 7:25 pm

googling with "IBM52" returned about 2000 hits
cheers
enrico
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so that I am sure that the information requested can be reached with a very small effort
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Re: Old IBM Hardware indentifcation

Postby tjjohn61 » Wed Apr 04, 2018 8:51 pm

Yeah thanks, but that doesn't solve the mystery. I did the same. I guess I'll never find out. Thanks all the same.
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Re: Old IBM Hardware indentifcation

Postby tjjohn61 » Wed Apr 04, 2018 9:10 pm

One thing is for sure, I''ll bet you could plug that old piece of junk back into it's mainframe, it it would work just fine. I have an old 486 PC and all the caps have popped. It'll never work again. This old IBM has no caps or resistors or anything. In fact, I wonder what the vertical IC circuits are. The amount of engineering that went into designing this old gem is amazing. Totally obsolete now. Somehow makes me more fond of it.
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Re: Old IBM Hardware indentifcation

Postby prino » Fri Apr 06, 2018 4:46 pm

tjjohn61 wrote:I did post this some years ago, but had no satisfactory or conclusive answers. Someone suggested it was a floppy drive controller, about the size of a frisbee back then. Anyway, I guess it will remain a mystery. Seems destined to be a museum piece...in my loft :mrgreen: I wonder if a can get any money for it on eBay! Maybe enough for one coffee at Starbucks!

There are people on eBay who pay fortunes for such old stuff, been there, sold one, shipping to the US from the UK was more than the price of the item. You can always donate it to the Computer Museum.
Robert AH Prins
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Re: Old IBM Hardware indentifcation

Postby tjjohn61 » Tue Apr 17, 2018 6:42 pm

Thanks Robert, it's yours for 50 Euros! lol. I guess it will always remain a mystery. It was part of an old university mainframe, that's all I can say. Some hardware engineer in his 80s might be able to identify it. IBM52 is printed on most of the components, but googling IBM 52 returns a bunch of unrelated hits.
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