Path: utzoo!lsuc!ncrcan!brambo!sid
From: sid@brambo.UUCP (Sid Van den Heede)
Newsgroups: comp.lang.postscript
Subject: Re: Reading Data From PostScript
Message-ID: <398@brambo.UUCP>
Date: 22 Apr 88 02:20:54 GMT
References: <2013@optilink.UUCP>
Reply-To: sid@brambo.UUCP (Sid Van den Heede)
Organization: Bramalea Software Inc., Bramalea, Ont.
Lines: 22

In article <2013@optilink.UUCP> cramer@optilink.UUCP (Clayton Cramer) writes:
>
>Does anyone know how to detect a lapse of time in PostScript?  I don't
>see a timer function of any sort, and looping for n iterations is highly
>dependent on the hardware.

The Adobe red book documents a bug in manual feeding, where a page that
you want to have printed on manually fed paper is printed on a page from the
tray if you tell it to manually feed to soon after another page has printed.
They also provide a workaround, which involves delaying for 5 seconds
before requesting manual feed.  Thus, there is a timer, and it's a variable,
not a function.  Here's the workaround, which demonstrates the use of the 
variable, and shows that the variable varies "behind the scenes".

usertime 5000 add		     % current usertime + 5000 ms
{dup usertime lt {pop exit} if} loop % wait for usertime to catch up
statusdict /manualfeed true put
-- 
Sid Van den Heede		Voice: 416-792-1137
sid@brambo.UUCP			FAX:   416-792-1536
...!uunet!mnetor!utgpu!telly!brambo!sid
Bramalea Software, Suite 406, 44 Peel Centre Dr, Brampton, Ontario  L6T 4B5