uda50 driver for system V

[gwyn at BRL-VLD.ARPA]

From:      Doug Gwyn (VLD/VMB) <gwyn at BRL-VLD.ARPA>

I saw no UDA50 driver in the UNIX System V Release 2.0 distribution.
AT&T has a habit of only supporting limited subsets of DEC computer
configurations, usually not the newest packages.  Presumably this is
partly because they want to ship only tested software and there is
a time lag from the time DEC starts shipping new equipment to the time
that AT&T UNIX developers have acquired the equipment, developed
support for it, and done sufficient pre-release testing.

I seem to recall someone saying that the DEC UNIX Engineering Group
(if they are still called that) had a UDA50 driver for UNIX System V.
I don't know if this is really true or how easy it is to get hold of..