Re: A86: Quick question...

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Quick question...
From: ComAsYuAre@aol.com
Date: Sat, 22 Jan 2000 15:36:24 EST
Reply-To: assembly-86@lists.ticalc.org

In a message dated 1/22/00 3:22:30 PM Eastern Standard Time, 
rabidcow@juno.com writes:

> btw, i got the 
>  >   add a,$90
>  >   daa
>  >   adc a,$40
>  >   daa
>  bit from some amd documentation for intel 80x86 series processors, but it
>  works nicely with the z80, too.

Any chance you could explain how that works?  I noticed that the $90 wrapped 
the A-F characters back around and somehow affects the carry flag when it 
_isn't_ A-F.  Kinda strange...

----
Jonah Cohen
<ComAsYuAre@aol.com>
http://linux.hypnotic.org/~jonah/ (down)

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