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From: pda@stiatl.UUCP (Paul Anderson)
Newsgroups: rec.humor,comp.misc
Subject: Re: Looking for Computer Folklore
Message-ID: <3539@stiatl.UUCP>
Date: 6 Mar 89 15:06:38 GMT
Reply-To: pda@stiatl.UUCP (Paul Anderson)
Organization: Sales Technologies Inc., Atlanta, GA
Lines: 18

A long time ago, on a processor that screamed (compared to the Mighty Ones 
we use today  :-),  I encountered the following sequence in the kernel:

	DI	; stop this race car.
	HLT	; grind...
	HLT	; shriek!
	HLT	; STOP!
	HLT	; uggh, just too much processor momentum here! 

It was a Z80 based system.  The idea was that at the time of the
DI, there could be 3 pending interrupts that would be serviced, and as
everyone recalls, an interrupt on the Z80 will cause you to execute
the instruction on return from the ISR.  Or something like that!   :-)

Paul
-- 
Paul Anderson		gatech!stiatl!pda		(404) 841-4000
	    X isn't just an adventure, X is a way of life...