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- From: francini@narfvx.enet.dec.com (John Francini)
- Newsgroups: comp.os.vms
- Subject: Re: HP DeskJet on VMS 5.4-2 extra page eject/form feed
- Message-ID: <1993Jan24.221114.15586@nntpd.lkg.dec.com>
- Date: 24 Jan 93 21:53:03 GMT
- References: <01GTR0REM8CG91W9M7@admin.ripon.edu> <1993Jan22.180051.17983@mksol.dseg.ti.com>
- Sender: usenet@nntpd.lkg.dec.com (USENET News System)
- Organization: Digital Equipment Corporation, Littleton, MA
- Lines: 94
-
-
- In article <1993Jan22.180051.17983@mksol.dseg.ti.com>, pyron@skndiv.dseg.ti.com (Dillon Pyron) writes...
- >
- >In article <01GTR0REM8CG91W9M7@admin.ripon.edu>, SCHANG@ADMIN.RIPON.EDU ("Jeff Schang ") writes:
- >>I'm setting up a DeskJet 500 to run on our VAXStation 3100 (5.4-2) and I am
- >>having one small problem. The printer and queue are working perfectly
- >>except for the fact that the DeskJet ejects ONE blank page BEFORE every
- >>print job. The DeskJet will eject TWO blank pages before the first job
- >>that is printed after the queue or the printer is reset.
- >
- >Well since the HP DJ500 on my (cough, my wife's) PC doesn't exhibit this, I'd
- >tend to look at the VAX.
- >
- >>
- >>I have checked the SET QUEUE command for queue characteristics and I
- >>have checked the DeskJet book for an answer, but I haven't been able to
- >>figure out the problem. I have tried setting the queue to default=nofeed
- >>and taking out the separate qualifier, but I get the same result.
- >>
- >>I set the terminal up as an LQP02 which is directly connected to the serial
- >>port on the VAXStation, hence no LAT.
- >>
- >>I have tried setting the terminal to an LA100 and LN03, which yields
- >>the same result as well.
- >>
- >>Has anyone tried a similar setup, and if so, do you have any ideas? Is
- >>there a queue qualifier I'm missing, or a symbiont I should be using?
- >>
- >>I have included the terminal config and queue config below. I created the
- >>HP500CTL device control library from scratch using the DeskJet manual and
- >>have had no problem printing with various forms aside from the extra eject.
- >>Thanks for any help.
- >>
- >>+-------------------------------------------------------------------+
- >>| Jeff Schang Systems Manager/Postmaster schang@admin.ripon.edu |
- >>| Ripon College PO Box 248 Ripon, WI 54971 414/748-8713 |
- >>+-------------------------------------------------------------------+
- >>
- >>
- >>Terminal queue CENLETTER, on ARIEL::CENLQP, mounted form NARROW (stock=REGULAR)
- >> /BASE_PRIORITY=4 /DEFAULT=(FEED,FORM=NORMAL (stock=REGULAR))
- >> /LIBRARY=HP500CTL Lowercase /OWNER=[SYSTEM] /PROTECTION=(S:E,O:D,
- >> G:R,W:W) /RETAIN=ERROR /SEPARATE=(RESET=(RESET))
- >>
- >>
- >>
- >>Form name Number Description
- >>--------- ------ -----------
- >>NARROW (stock=REGULAR) 19 13 pitch draft
- >> /LENGTH=66 /SETUP=(DRAFT,CPI13,VPI6) /STOCK=REGULAR /TRUNCATE /WIDTH=200
- > ^^^^^^^^^^^^^^^^
- >What do these do? Is there any chance that any of these escape sequences
- >contains anything that might cause a form feed. I'm not certain, but I believe
- >the DJ will do a formfeed if its buffer gets too full. Normally not a problem
- >as it is quite big, but some escape sequences can be enormous!
- >
-
- Without actually seeing the contents of your setup modules it's somewhat
- hard to know for sure, but there _are_ a couple of things everyone trying
- to run an non-ANSI printer should know about VMS, the print symbiont, and
- forming setup and reset modules.
-
- 0. The page eject at initial queue startup can not be eliminated without
- code changes to the symbiont. Period. The print symbiont was designed back
- in the days of real tractor-fed line printers, and since at startup it had
- no idea where the printer was positioned, it always assumed the worst and
- sent a formfeed before starting the first job. Most people didn't notice
- or care, since your typical full-size line printer required three or four
- pages ANYWAY to be wasted just to get the paper completely loaded.
- (Typically, the printer's stacker was about three sheets away from the
- print line.)
-
- 1. The symbiont (stupidly, in my opinion) tries to parse any control
- sequences it sees in setup and reset modules to determine what effect they
- may have on the paper position. However, its ideas about valid escape
- sequences haven't changed since the early 80s (and it knows nothing about
- non-ANSI devices like your HP). So, much of the time, it gets it wrong and
- thinks the escape sequences moved the printer away from line 1 column 1 and
- throws a page.
-
- 2. The symbiont ignores any control sequences that are imbedded inside the
- escape sequences <ESC>P and <ESC>\. [This was originally done to handle
- ReGIS sequences, which are always bracketed by these two characters.] So,
- you can put your DeskJet control sequences inside <ESC>P and <ESC>\
- delimiters. NOTE WELL: Do NOT include ANY carriage returns, formfeeds, or
- comments in the sequences, or you will get an unwanted blank page.
-
- These should solve most problems. [There are a few pathological situations
- that require stronger measures, but that is a subject for another post.]
-
- John Francini
- Engineer, PATHWORKS Server Development Group
- Digital Equipment Corporation
- Littleton, MA
-