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From: roy@gitpyr.UUCP (Roy J. Mongiovi)
Newsgroups: net.micro
Subject: 8086 et al status bits question.
Message-ID: <435@gitpyr.UUCP>
Date: Mon, 17-Dec-84 19:25:00 EST
Article-I.D.: gitpyr.435
Posted: Mon Dec 17 19:25:00 1984
Date-Received: Wed, 19-Dec-84 02:47:28 EST
Distribution: net
Organization: Georgia Institute of Technology, Atlanta, GA
Lines: 13

I'm sort of curious about the possible reasons behind a little quirk
in the way the 8086 family of processors sets the status bits.  What
is the value of having the INC and DEC instructions set all the bits
EXCEPT for the carry flag?  I mean, there must be some reason, right?

Is it really useful to be able to do a comparison followed by an INC
(or DEC), and then be able to do a JC or JNC on the comparison?
-- 
Roy J. Mongiovi.	Office of Computing Services.		User Services.
Georgia Institute of Technology.	Atlanta GA  30332.	(404) 894-6163
 ...!{akgua, allegra, amd, hplabs, ihnp4, masscomp, ut-ngp}!gatech!gitpyr!roy

	  Who me?  I'm not even a REAL modo, I'm only a quasi-modo.