Aqumix.1019
net.periphs
utcsrgv!utzoo!decvax!ittvax!qumix!msc
Thu Feb 25 12:16:36 1982
IEEE 488 bus

	Here is a digest of the replies I received to my query about
	controlling an IEEE 488 bus from a vax.

		The Ungermann-Bass NET/ONE will support an IEEE 488.
		This seems like overkill however.  I haven't heard of
		any UNIBUS devices, which would seem the sensible way
		to go.

		There are 488 controllers for PDP-11s.  Try one of
		those on the UNIBUS.  It might also be possible to
		control a 488 through a DR11-B or DR11-C; It would
		probably require a little bit of external logic.
		Fairchild and others have 488 controller chips out if
		you want to go that route.

		DEC actually makes an IEEE488 UNIBUS board which I've
		heard actually works.  I don't know if they support it
		on the VAX tho...  It is called the IB11 according to
		my 1980 Peripherals Handbook, pg 293.  It is a bus
		MASTER, set up to control up to 15 devices.

	Thanks to Alan Watt, Steve Tarr and Bruce Borden for their
	help.

	Mark Callow

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