MotherBoard equivalent for Older Generation Computers

Firstly, I apologize if this is the wrong place. My question is what is the equivalent of Motherboard in the older generation computers (like the 1st Gen computers) ???
I heard it was vacuum tubes. If so, I would like to know how they performed the function of a motherboard.
Thanks in advance.

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We called it a backplane.

If you looked at very early computers that used tubes, they often had a rudimentary backplane. Later these advanced to such as the VMEBUS and for the personal computers the S-100 was very common.

With the Apple 1 you see the beginnings of the motherboard where the computer was small enough to be put directly on the backplane.


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Ancient Greek s had computers

There were no mtrbds. in the tube era. If anything these were dedicated devices, etc. that did a task in/out or to process. Those computers that were mechanical and/or before anything transistors were mostly in the 50-60's era. There were modules at best or wirewrap to include backplanes, black boxes or PCB's mounted on busses which are concidered backplanes. Also, tubes found on older computers may have been power related rather than logic.

Google for computer museums, even WWII era ultra enigma decoders. However, don't confuse analog computers to what was the 1st electrical or non-mechanical type computers.

tada -----Willy Happy

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