Date   : Tue, 12 Oct 2004 11:07:40 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Bit clear

Andrew W <a.weston2@...> wrote:
> I'm using the following to set a particular bit of a byte using a
> byte stored at &70.
> ORA &70
[snip]
> However is there a way of doing bit clear:
> t4%=(t4% AND NOT (2^__%))
 
AND xx will clear those bits in A that are also clear in xx.
ie,    A            xx      after AND xx
   %abcdefgh    %01010101    %0b0d0f0h
 
If you want to clear those bits that are *set* in xx, try
OR xx:EOR xx
 
       A            xx      after OR xx  after EOR xx
   %abcdefgh    %01010101    %a1c1e1g1    %a0c0e0g0
 
> 
> A.Weston
> --
 
Your signiture should be *after* your sig seperator, not before it!
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
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