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Article #5058

LPT1 to COM1 Redirection

#5058
From: morro
Date: Thu, 15 Apr 1993 04:58
62 lines
4224 bytes
Hello Everyone,

   How does one redirect printing ports under factory installed OS/2 2.0 ?
I am using a printer sharing device, which apparently does not talk back to
the computer and I am having enormous amount of trouble using my printer
(HP Laser Jet III) if I just set the Printer Object (in both OS/2 and
Win-OS/2) to print to COM1:.  On some occasions, the printer (apparently
with larger files) just stalls, but appears to be able to print one page
at a time (from some apps, I have to tell it to print "current page only"
which is somewhat inconevient, esp. with large documents).  I have tried
the following approches:

	1. set "output" in both (OS/2 and Win-PS/2) to COM1 which works
	   one page at a time, but very slowly; however, it crashes if
	   my ATM is turned on.

	2. set output in both to LPT1 and using the SPOOL /D:LPT1 /O:COM1
	   command in the startup.cmd

	3. looking for the Redirect option in the Printer Object.  this
	   is somewhat weird but that option also appears only on certain
	   occasions.  for example, it was not there under the original
	   set up conditions (machine just out of the box).  all of a
	   sudden it appeared, perhaps because i ran the SPOOL command,
	   but i am not quite sure.

  During one printer stalls, i deleted the current printing job and somehow
the Printer Object disappeared as well.  I reinstalled it using the template
from the Templates folder and somehow the Redirect option was available.
I then just clicked on COM1 directly and when I tried the LPT1 again, the
Redirect option was no longer avaialble.  What gives ?

  I suspect that part of the problem may be the slowness of COM1 communication
coupled with the fact that the printer sharing device does not respond to
queries from the system.  I tried resetting the printer by using a separator
file which contained an escape sequence which is supposed to reset the printer
but also to no avail.  If there is any way around this problem, I would
certainly appreciate hearing about it.  Thanks,

  Incidentally, on my system at home I have LPT1 set up as the port for my
Laser Jet IIIP printer *and* a Post Script driver (Laser Writer II NTX)
which I use with a Post Script cartridge in the IIIP.  I also have LPT3
set up as a logical port for my fax board.  Both show the Redirect option
and both work flawlessly with appropriate hardware.

  I also would like to find out how do the factory installed and the GA + SP
differ.  I noticed that the former is set up as FAT with boot manager.  At
home I have all HPFS.  Given the printer difficulties and the partition
set up, I would prefer to obtain a GA + SP version - is it possible to
obtain this from IBM ?

John Duchowski

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From: morro@drycas.club.cc.cmu.edu
Newsgroups: comp.os.os2.apps,comp.os.os2.misc,bit.listserv.os2-l
Subject: LPT1 to COM1 Redirection
Date: 15 Apr 93 00:58:32 -0400
Organization: Carnegie Mellon Computer Club
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