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Posting-Version: version B 2.10.2 (Tek) 9/28/84 based on 9/17/84; site mako.UUCP
Path: utzoo!linus!decvax!tektronix!orca!mako!jans
From: jans@mako.UUCP (Jan Steinman)
Newsgroups: net.micro
Subject: Re: Assembler Level Commands (6800 HCF folklore)
Message-ID: <889@mako.UUCP>
Date: Sun, 4-Aug-85 20:02:13 EDT
Article-I.D.: mako.889
Posted: Sun Aug  4 20:02:13 1985
Date-Received: Wed, 7-Aug-85 01:28:12 EDT
References: <881@rayssd.UUCP> <30700024@waltz> <210@omen.UUCP>
Reply-To: jans@mako.UUCP (Jan Steinman)
Organization: Tektronix, Wilsonville OR
Lines: 18
Summary: 

In article <210@omen.UUCP> caf@.UUCP (Chuck Forsberg WA7KGX) writes:
>Don't forget
>	HCF	9D
>on the 6800.  This is an actual instruction that caused the chip to read
>sequentially through the entire 64k address space forever.

I heard it stands for "Halt and Catch Fire" because, by outward appearances,
the chip had halted, but the continual clocking of the address bus caused
chip dissipation to go up noticibly.  Most likley, it meant "Halt and Clock
Forever".

>I've even used it myself, but utually its just another form of crash.

Did you happen to put a damp finger on the chip to see if it was, indeed,
"catching fire"?
-- 
:::::: Jan Steinman		Box 1000, MS 61-161	(w)503/685-2843 ::::::
:::::: tektronix!tekecs!jans	Wilsonville, OR 97070	(h)503/657-7703 ::::::