QBUS
From Computer History Wiki
The QBUS, previously known as the "LSI-11 bus", was intended as a cheaper alternative to the UNIBUS system by Digital Equipment Corporation.
It was widely used in PDP-11s and VAXen.
The bus had multiplexed address and data lines, and was available in 16-, 18-, and 22-bit configurations.
Important note: The 16-bit and 18/22-bit backplanes are electrically incompatible and mixing the two may damage cards on the bus.
Signalling
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Wire list
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