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Path: utzoo!watmath!clyde!akgua!sdcsvax!sdcrdcf!hplabs!tektronix!ogcvax!sequent!merlyn
From: merlyn@sequent.UUCP
Newsgroups: net.unix
Subject: Re: question about csh quoting
Message-ID: <502@sequent.UUCP>
Date: Mon, 14-May-84 13:28:07 EDT
Article-I.D.: sequent.502
Posted: Mon May 14 13:28:07 1984
Date-Received: Mon, 21-May-84 04:49:57 EDT
References: <433@noscvax.UUCP> <904@elsie.UUCP> <1100@ihuxl.UUCP>
Organization: Sequent Computer Systems, Portland
Lines: 30

> From: seifert@ihuxl.UUCP
> Message-ID: <1100@ihuxl.UUCP>
> Date: Fri, 11-May-84 05:41:31 PDT
> 
> ...The only problem I've
> seen with this is that all the decwriter consoles have big
> signs on them saying don't use ^p. Appariently it locks up a
> decwriter....

It isn't the decwriter that gets locked up.  The VAX cpu senses ^P 
on the console (when not in Secure mode) as the "front-panel" trigger...
your decwriter becomes the VAX's front panel.  For example, ^P
followed by H halts the cpu, and ^P followed by B reboots it.
^P followed by other incantations dumps out registers, memory, and
so on.

Not a nice thing to do while UNIX is up and running!

If you leave the front panel keyswitch in "secure", that won't happen
though.  It's nothing to do with the fact that you have a decwriter for
a console.

-- A particularly personal and original observation from the thought-stream of
Randal L. ("control-P'ed") Schwartz, esq. (merlyn@sequent.UUCP)
	(Official Legendary Sorcerer of the 1984 Summer Olympics)
Sequent Computer Systems, Inc. (503)626-5700 (sequent = 1/quosine)
UUCP: {decwrl,ogcvax,pur-ee,rocks34,shell,unisoft,vax135,verdix}!sequent!merlyn

P.S. UNIX is a trademark of somebody.  VAX is a tradmark of Dec.  Decwriter
probably is too, now that I think about it.