[comp.periphs.printers] Sharing a laser printer between a PC clone and a Mac

bovet@hao.ucar.edu (Ray Bovet) (11/08/90)

We are planning on providing both an IBm PC clone and a Mac in a public
area for users.  We would like to share a single laser printer between the
two.  The normal way to connect a laser printer to a Mac is to buy a
Postscript printer and connect it via Appletalk.  The normal way to connect
a laser printer to a clone is to buy an HP Laserjet and connect it via
the parallel interface.  I'd certainly be comfortable buying an HP with
HP's Postscript cartridge so that it could go either way (although you
have to turn it off and remove the cartridge in order to go back to HPCL).
But if we do that, how do we switch between Appletalk (which requires yet
another adapter for the HP) and the parallel port on the PC?  Does anyone
have any suggestions on how to do this cleanly?  Any suggestions for how
else to accomplish our overall goals more efficiently (please no flames about
IBM vs Apple, etc).

				Ray

steve@Advansoft.COM (Steve Savitzky) (11/09/90)

I am currently doing this very thing, using a LJIIP.  I am NOT using a
postscript cartridge: I use MacPrint on the Mac, which basically turns
your LJ into a Quickdraw printer, and talks through the serial port at
19.2 Kbaud, which is slow but not impossible.  If I ever need
postscript I would probably get a postscript interpreter for the Mac,
e.g. Jetscript or Freedom of Press.  You need at least an extra
megabyte of memory in the printer to get 300DPI graphics.  MacPrint is
what HP recommends, by the way.

An additional advantage of this hack is that I simply plug the Mac
into the LJ's serial port (the cable comes with the MacPrint software,
$89 total), the PC into the parallel port (standard Centronics
interface), and switch between them with the front panel.

  (QUESTION:  Anyone out there know if there is a magic escape
  	      sequence I can send to switch ports?)

There seems to be a sort of conspiracy between the manufacturers and
the Mac magazine reviewers not to mention this option; this results in
the LJIIP getting comments like "nice print quality, but very expensive
because of all the adapters you need."  I paid $1200 total.
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