Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site gitpyr.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!gatech!gitpyr!roy 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.