DHU-11 Driver for 4.2?

[whm at bocklin.UUCP]

A friend of mine has a 750 with a DHU-11 multiplexor.  He wants to run
4.2 on this system, but the DHU-11 is apparently a beefed-up DH-11 or
something like that and the standard DH-11 driver won't work because the
device registers are not the same (in non-trivial ways).

Does anybody have a 4.2 driver for this device?

					Bill Mitchell
					whm%arizona at csnet-relay
					{ihnp4,noao,mcnc,utah-cs}!arizona!whm