View source for QBUS

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-11]]s and [[VAX]]en.

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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[[Category: Bus Architectures]]