Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!execu!sequoia!chinacat!woody
From: woody@chinacat.Unicom.COM (Woody Baker @ Eagle Signal)
Newsgroups: comp.lang.postscript
Subject: Re: novice question - HP emulation
Summary: try systemdict
Keywords: HP emulation
Message-ID: <1777@chinacat.Unicom.COM>
Date: 6 Jan 91 06:58:52 GMT
References: <1991Jan3.175423.2011@cbnewsl.att.com>
Distribution: na
Organization: a guest of Unicom Systems Development, Austin
Lines: 35

In article <1991Jan3.175423.2011@cbnewsl.att.com>, rl@cbnewsl.att.com (roger.h.levy) writes:
> We have a few Dataproducts LZR 1260 printers that are shared among a
> risks eventual degradation of an EEPROM if there is frequent toggling
> of softwareiomode.  If this is true, it appears that the printer

I have never seen a LZR 1260 but I would guess that somewhere in
either statusdict, serverdict or $printerdict there is a procedure
that will execute the emualtor.
Older printers had one called
hplj
so 
serverdict begin statusdict begin hplj 
would start it.
Other printers have   exechplj or something similar.
Hook a serial line up to a computer that has a terminal emulator with
ascii screen capture.  set the baud rates to match the laser, and hook the
cable to the laser.  then type in

executive

This should start the PS> interpreter in interactive mode.
turn on your ascii screen capture mode and do the following

statusdict load {== ==} forall
serverdict load {== ==} forall

This will dump the dictionaries to your screen.  search the file
for switchopen or something simialar.  Better yet, try hunting for
hplj  You will find a command to invoke the emulator.  Typically, it
is in an array called switchopen, and is indexed by the value of the
thumbwheel switch on the back of the printer.

Hope this helps
Cheers
Woody