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From: boykin@custom.UUCP (Joseph Boykin)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Interesting 80X86 instruction
Message-ID: <769@custom.UUCP>
Date: Fri, 7-Aug-87 14:52:23 EDT
Article-I.D.: custom.769
Posted: Fri Aug  7 14:52:23 1987
Date-Received: Sun, 9-Aug-87 04:56:15 EDT
References: <767@custom.UUCP> <929@bsu-cs.UUCP>
Organization: Custom Software Systems; Natick, MA
Lines: 20
Summary: Absolutely correct!

In article <929@bsu-cs.UUCP>, dhesi@bsu-cs.UUCP (Rahul Dhesi) writes:
> In article <767@custom.UUCP> boykin@custom.UUCP writes:
> >Taking out my handy debugger I found that
> >AAD *is* a one-byte instruction with the second byte acting
> >as a parameter.
> 
> When offering advice like this, please always be sure to include this
> disclaimer:  "WARNING:  SOFTWARE TAKING ADVANTAGE OF THIS INFORMATION
> WILL PROBABLY FAIL IN THE FUTURE."  Remember, naive users may not
> realize this unless you tell them.

You're ABSOLUTELY correct!  I've violated one of my own basic rules!
I found it interesting that the instruction had the multiplier
as the second byte, and that is all.  I most definately do not
recommend using such instructions outside of a confined set
of machines.

Joe Boykin
Custom Software Systems
...necntc!custom!boykin