Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!mips!decwrl!adobe!heaven!heaven.woodside.ca.us
From: glenn@heaven.woodside.ca.us (Glenn Reid)
Newsgroups: comp.lang.postscript
Subject: Re: How can I tell if a file is "postscript"
Message-ID: <449@heaven.woodside.ca.us>
Date: 6 Mar 91 18:02:08 GMT
References: <1448@vidiot.UUCP>
Sender: glenn@heaven.woodside.ca.us
Lines: 20

In article <1448@vidiot.UUCP> brown@vidiot.UUCP (Vidiot) 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
> listing, i.e., the PostScript code will print as normal text and the program
> will not run.

Wow.  Are you sure?  This is certainly not the case with my LaserWriter
II NTX (Version 47.0).  I can appreciate that I don't have the newest or most
wonderful LaserWriter, but I'd be surprised if recognition of %! were built
into the printer itself.  Are you sure it's not the print spooler that's
recognizing %! and filtering it to text (lpr) mode?  If you're running
TranScript, TranScript does indeed do this at the spooling level.

--
 Glenn Reid				RightBrain Software
 glenn@heaven.woodside.ca.us		NeXT/PostScript developers
 ..{adobe,next}!heaven!glenn		415-851-1785 (fax 851-1470)