Unibus: for building block computers 1970s-1990s

Unibus: for building block computers 1970s-1990s

Elegance - One, general purpose switch to connect:

Longevity

Progenitor of

15 m> 1 m > .20cm.

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Notes:

My favorite computer architecture uses a single bus to interconnect all the computer’s components. This was first used to build the PDP-11.

Beginning in the mid-80s, nearly all computers were built using this structure. It works well because all components can communicate with one another. Since each processor includes a cache, bus traffic is reduced. Caches can remain coherent by observing each other’s transactions.