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From: jrv@siemens.UUCP
Newsgroups: net.micro.pc
Subject: Re: MS DOS crashes on random keyboard in
Message-ID: <23900016@siemens.UUCP>
Date: Fri, 18-Apr-86 09:55:00 EST
Article-I.D.: siemens.23900016
Posted: Fri Apr 18 09:55:00 1986
Date-Received: Sun, 20-Apr-86 16:45:38 EST
References: <2026@cbosgd.UUCP>
Lines: 16
Nf-ID: #R:cbosgd:-202600:siemens:23900016:000:532
Nf-From: siemens!jrv    Apr 18 09:55:00 1986




One very frustrating way to hang the system is to accidently request
a screen dump or logging of output to the printer when there is no
printer connected to the system. Control or Alt print-screen will do
this. One way to prevent stop the ystem form hanging is to map the print
screen interrupt, interrupt 5, to a do nothing routine or a routine 
which will test for presence of the printer before continuing.



Jim Vallino
Siemens Research and Technology Lab.
Princeton, NJ
{allegra,ihnp4,seismo,philabs}!princeton!siemens!jrv