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From: kpk@gitpyr.UUCP (Kevin P. Kleinfelter)
Newsgroups: net.micro.pc
Subject: BCD MATH ON 808x
Message-ID: <599@gitpyr.UUCP>
Date: Fri, 26-Jul-85 08:40:05 EDT
Article-I.D.: gitpyr.599
Posted: Fri Jul 26 08:40:05 1985
Date-Received: Sat, 27-Jul-85 05:41:14 EDT
Distribution: na
Organization: Georgia Institute of Technology
Lines: 6

Does anyone know what Intel had in mind when they created the BCD 
instructions for the 808x?  As near as I can tell, the instruction
set supports only unsigned BCD.  I need to do signed math in BCD.
Is there a better way than testing the signs and magnitudes, doing
unsigned math, and inserting the correct sign after the fact?
                                Thanks