Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!chinacat!woody
From: woody@chinacat.Unicom.COM (Woody Baker @ Eagle Signal)
Newsgroups: comp.lang.postscript
Subject: Re: How can I tell if a file is "postscript"
Summary: just shich laserwriter?
Message-ID: <1907@chinacat.Unicom.COM>
Date: 8 Mar 91 06:16:39 GMT
References: <7647@uceng.UC.EDU> <1991Mar4.075212.12828@lth.se> <1448@vidiot.UUCP>
Organization: a guest of Unicom Systems Development, Austin
Lines: 18

In article <1448@vidiot.UUCP>, brown@vidiot.UUCP (Vidiot) writes:
> In article <1894@chinacat.Unicom.COM> woody@chinacat.Unicom.COM (Woody Baker @ Eagle Signal) writes:
> <In article <1991Mar4.075212.12828@lth.se>, d89mb@efd.lth.se (Magnus Bodin) writes:
> 
> Not quite.  The %! on the first line is required by the LaserWriter printers
> and compatibles.  It is NOT part of the definition for EPSF or EPSI.  If that
> special comment line is missing, the LaserWriter series printers will change
> to Diablo emulation mode and the PostScript program will print out as a source

Just which printers?  I think that you are getting the MAC printing software
confused with the printer.  Every laser that I've ever seen could care
less about comment lines.  The PS-410 might well key off of those, in it's
auto switching, but that is not altogether the only way to recognize PS
code.  Not having a PS-410 I can't verify this, but having worked with several
Apple printers, I have never seen this behavior.

Cheers
Woody