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a free design

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consider a motherboard and a daughterboard and
language boards and memory boards and driver boards
plugged in to the daughterboard .WHEN WAS THAT FIRST
AVAILABLE ? WAS THAT EARLY IN THE 1980'S ?

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by thechas

SouthWest Technical Products with their 6800 based PCs used a back plane system.

There were the S-100 and STD buss based systems that had a variety of cards that plugged onto a back-plane.

If memory serves me right, the early Heathkit H8 systems were card and back-plane too.

Actually, prior to the Apple and PET 'most' computer systems were cards that plugged onto a back-plane that provided power and a data buss.
This includes the early PDP series from Digital.

Chas

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