Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!munnari!ditmela!latcs1!philip
From: philip@latcs1.oz (Philip Lee)
Newsgroups: comp.sys.mac
Subject: Re: LaserWriter password
Summary: TEX clobering LaserWriter EEPROM
Message-ID: <4598@latcs1.oz>
Date: 5 Sep 88 22:58:40 GMT
Article-I.D.: latcs1.4598
References: <4579@latcs1.oz> <17000140@clio>
Reply-To: philip@latcs1.oz (Philip Lee)
Organization: Comp Sci, La Trobe Uni, Australia
Lines: 21

Thanks to Mike Berger for the solution, I have now installed a socket for
the 2804 EEPROM, so we can replace it when it happends again without wearing
out my nerves desoldering the beast.
According to our SA, the problem happends when you send a TEX job that is too
big for the page. TEX assumes device truncate and the LaserWriter assumes
software truncate, the result is some memory overflow which clobbers the EEPROM.
In the past, we've found the test page flag turned off/on and the copy
counter reset to some random number. However this time it was more drastic,
the password register was hit.
If this is correct, does anyone know of a solution to stop it from happening
again?
The LaserWriter is connected to the Pyramid through the RS232 port and to
several Mac Plus and SE's on the AppleTalk. It is used from the Pyramid
mainly for TEX work.

Philip P.H. Lee,
La Trobe University,
Dept. of Computer Science,	PHONE:	+61 (03) 479 2902
Bundoora,			A/CSnet:philip@latcs1.oz
Victoria 3083,			ARPA:	philip%latcs1.oz@uunet.uu.net
AUSTRALIA.	UUCP:{uunet,hplabs,mcvax,ukc,nttlab}!munnari!latcs1.oz!philip