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- Newsgroups: comp.sys.hp
- Path: sparky!uunet!mcsun!Germany.EU.net!news.netmbx.de!zrz.tu-berlin.de!jaenicke
- From: jaenicke@emserver.ee.tu-berlin.de (Lutz Jaenicke)
- Subject: Re: Parallel port compatibility problems?
- Message-ID: <H0J5YNK@mailgzrz.tu-berlin.de>
- Sender: news@mailgzrz.tu-berlin.de (News Manager)
- Nntp-Posting-Host: emws1.ee.tu-berlin.de
- Organization: TU-Berlin, Institut fuer Elektrische Maschinen
- References: <1992Jul28.221947.247982@cs.cmu.edu> <7371188@hpfcso.FC.HP.COM> <1992Jul29.160927.17532@ncube.com>
- Date: Wed, 29 Jul 1992 17:04:10 GMT
- Lines: 42
-
- In article <1992Jul29.160927.17532@ncube.com> russell@ncube.com writes:
- >This is true on the above systems. Unfortunately, there is apparently NO
- >way of changing this on the 700 series. Why not?
- >
- >The Centronics standard is not the IBM PC parallel standard -- but they
- >are very close. Many printers are designed to automatically handle
- >either one, so you don't care. Most parallel drivers are designed to be
- >able to drive either "standard". The 700 series lacks this ability. :^(
- >I want to connect a Dataproducts LZR1560 to my 750 parallel port.
- >Unfortunately, this printer only talks IBM PC parallel. :^( again!
- >
- >I care because I need a Postscript printer that can handle 8.5x11 and
- >11x17. My only options appear to be the QMS ($$$) or the Dataproducts.
- >So, got any solutions for us 700 series folks?
- >
- >Russell Randolph
- >nCUBE, Beaverton, Oregon
- >russell@ncube.com
-
- I had the problem with the parallel port on an 710, too. At least our
- Kyocera laser printer seems reacts not on the falling but on the
- rising edge of "strobe_not". I "fixed"^1 this problem with a 74ACT00
- in a dongle box (all together <3$), which inverts the strobe line
- and hence makes a rising edge from falling one. The IC is supplied
- by the printers "select" line which is high during normal printer
- operation.
-
- It works for me for some weeks now without problems, even though I
- would strongly encourage HP to make the parallel port like the
- PC one's, at least I want to have a switch to decide on my own.
-
- Lutz
- ^1 Please refer to my .sig to see, that 1. I should now at least a
- little bit about electronics and 2. I am working in a university,
- what gives me time to solder my own solutions, because I am payed
- anyway, so my time isn't worth any money compared to a $20
- commercial solution. :-)
- --
- Lutz Jaenicke jaenicke@emserver.ee.tu-berlin.de
- Institut fuer Elektrische Maschinen jaenicke@emapollo.ee.tu-berlin.de
- Technische Universitaet Berlin Tel. (004930)314-24552
- Einsteinufer 11, D-1000 Berlin 10 Fax. (004930)314-21133
-