Q-bus tape drive problems

[goldberg at uiucdcs.Uiuc.ARPA]

Is there anyone running 2.9 on a 22-bit Q-bus system using any 18-bit
DMA devices?  In particular, I have a TM-11 emulator that only does
18-bit addressing.  Rebooting every time I want to use the raw device
is a royal pain.  Suggestions or code greatfully appreciated.  Thanks
in advance for any assistance.

			     Phil Goldberg
			     217-333-7620
			   goldberg at Uiuc.ARPA
	       ...!{ihnp4,convex,pur-ee}!uiucdcs!goldberg