Mastodawn

When somebody offers me some old computer related stuff, I tend to accept it, irrelevant of what it is. You never know…

I don’t remember how I got this box and I never knew its use.

Before posting about it, I did a bit of research. I sent ChatGPT a picture of the connector which looked to me as a distinctive feature. It got the number of pins wrong, so I counted them.

62! What mysterious device connected to that 62-pin D-shell connector?

1/2

#ThrowbackThursday #Retrocomputing

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crdotson Aug 14, 2025

@ebariaux The cable looks the same as on my expansion unit for an IBM PC (5150). Here’s a page about it: https://www.computinghistory.org.uk/det/21352/IBM-5161/

IBM 5161 - Computer - Computing History

The IBM Personal Computer, commonly known as the IBM PC, is the original version and progenitor of the IBM PC compatible hardware platform.The IBM Personal Computer, commonly known as the IBM PC, i...

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Eric Bariaux Aug 21, 2025

@crdotson Interesting, I did not know such a box existed for the IBM PC.

After a quick check, I saw that the original 8-bit PC bus (later called ISA) has 62 pins, same the expansion boxes connector.

I wonder if it’s a simple pin-to-pin wiring but I doubt it.