need help with 11/750 config for 4.2

[Yechiel Corn]

We are planning to run 4.2 on an 11/750. We want to equip it with
an RA-80 with UDA-50 controller, TU-80 tape drive, 1 DZ, and an Able DH/DM.
Is it possible/advisable to put all this on one UBA?  There are enough
backplane slots; this is not the issue. DEC has a
UDA-50 driver for Sys V, and it specifies that it requires its own UBA.
They say its because the UDA-50 uses up too many Address Map Registers
on the Unibus and as a result, the kernel would be severely limited in size.
Does this same restriction apply to 4.2?

Any helpful hints or pointers would be appreciated
Please respond directly by mail to

	{philabs,ihnp4,cucard,rocky2}!aecom!yechiel

Thanks in advance!

				Michael Corn