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Path: utzoo!linus!decvax!duke!unc!mcnc!idis!pitt!hoffman
From: hoffman@pitt.UUCP (Bob Hoffman)
Newsgroups: net.unix-wizards
Subject: Re: lp device and xerox 2700
Message-ID: <519@pitt.UUCP>
Date: Wed, 16-Nov-83 23:37:59 EST
Article-I.D.: pitt.519
Posted: Wed Nov 16 23:37:59 1983
Date-Received: Sun, 20-Nov-83 19:34:13 EST
References: osu-dbs.388
Lines: 24

The 'standard' DEC line printer is a Data Products drum printer
of some variety that has practically no special features at all.
It's connected to a parallel interface card on a UNIBUS with the
following parameters:

	*CSR:	Address 0777514
		Bits:	0100000	Error
			   0200 Done
			   0100 Interrupt Enable

	BUF:	Address 0777516
		Bits:	   0177	Data (7 bits)

	Interrupt vector: 0200

As you can see, there's nothing to it.  By the way, the 'Data
Products Interface' is a de-facto standard for printers, as is
Centronics, and several manufacturers make boards that use it.

	---Bob Hoffman, U. of Pitt Computer Science
		idis!pitt!hoffman     hoffman.pitt@CSNet-Relay
__
* This information came from the 1973-74 Peripherals Handbook.
  Ah, things were simpler, then.  -b