A92: testing bits of byte

A92: testing bits of byte

• To: assembly-92@lists.ticalc.org
• Subject: A92: testing bits of byte
• From: wavefnct@ix.netcom.com (Eric)
• Date: Wed, 29 Oct 1997 15:34:39 -0600 (CST)
• Reply-To: assembly-92@lists.ticalc.org

i need to test the bits of a byte and jump to some place if its one or 
some other place if its zero.
i tried using btst.b but that just caused crashes. i was thinking about 
this instead:

and #%0000001,d0  ; i think this modifies d0?
cmp.b #%0000001,d0 ; (if not this won't work)
bne place2   ; means its zero
bra place1   ; means its one

will that work?  am i using btst wrong?
i tried:
btst.b #1,d0
bne
bra
..
 
does btst change d0?

• Re: A92: testing bits of byte
• From: David Ellsworth <davidell@ix.netcom.com>
• Re: A92: testing bits of byte
• From: Niklas Brunlid <e96nbr@efd.lth.se>

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