Q-bus to Unibus link

[utzoo!decvax!ucbvax!unix-wizards]

>From gwyn at UTEXAS-11 Wed Nov 11 13:09:07 1981
Anyone who needs to make Q-bus devices hook up with Unibus systems or
vice versa should consider getting a "Qniverter" from Able and adding
a Unibus extension backplane to your Q-bus system.  This way you can
use any Unibus or Q-bus peripheral on the LSI-11 system (there is
also a converter for the other direction).  DMA works fine through
this device -- however, be aware that some non-DEC vendors of DMA
controllers violate bus specs in ways that will show up when using a
Qniverter!
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