[comp.sys.dec] LP27 on MicroVAX - more information

rmilner@zia.aoc.nrao.edu (Ruth Milner) (06/04/91)

A while back I posted a query about interfacing an LP27 to a BA23-based 
uVAX-II. I have since found out that the third-party UNIBUS interface we have 
for it does configure as an LP11, but it actually emulates the parallel port 
of a DMF-32. This explains why the printer, which supposedly has a Dataproducts
interface, would not work on a Convex.

I can't find anything in any of my DEC catalogs that lists the QBUS equivalent
of a DMF-32 or any portion thereof. I don't need the serial lines; is there
anything that just provides the parallel port? We need a long line driver as
well, since the printer will be about 100 feet away from the uVAX. This odd
card already provides that.

Thank you very much, and humble apologies for wasting the time of those people
who responded to my first posting.
-- 
Ruth Milner
Systems Manager                     NRAO/VLA                  Socorro NM
Computing Division Head      rmilner@zia.aoc.nrao.edu

terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.) (06/04/91)

In article <1991Jun3.234008.2414@zia.aoc.nrao.edu>, rmilner@zia.aoc.nrao.edu (Ruth Milner) writes:
> A while back I posted a query about interfacing an LP27 to a BA23-based 
> uVAX-II. I have since found out that the third-party UNIBUS interface we have 
> for it does configure as an LP11, but it actually emulates the parallel port 
> of a DMF-32. This explains why the printer, which supposedly has a Dataproducts
> interface, would not work on a Convex.

  The DMF's parallel port (when jumpered for operation as a printer) has the
same pinouts as an LP11 interface. Thus, the printer configuration and cable
are the same. The programming interface is different, though - but that's
normally handled by the VMS (or Unix, or whatever) device drivers.

  The Q-bus LP11 card is an LPV11.

	Terry Kennedy		Operations Manager, Academic Computing
	terry@spcvxa.bitnet	St. Peter's College, US
	terry@spcvxa.spc.edu	(201) 915-9381