[A83] Re: cp-ing a register

[A83] Re: cp-ing a register

• To: assembly-83@lists.ticalc.org
• Subject: [A83] Re: cp-ing a register
• From: Gavin Olson <gtolson@snet.net>
• Date: Sat, 29 Sep 2001 14:49:23 -0400
• In-Reply-To: <F180h7Yo46BAHtxI5He00009a75@hotmail.com>
• Reply-To: assembly-83@lists.ticalc.org

At 12:38 PM 9/29/2001 -0600, you wrote:

>I set a value to 'a' early in a program, but I want to do a cp on it and jp
>accordingly. It is my understanding that cp statements compare the last
>value to program used, with one that you specify. Is there a way to compare
>a given register with a value even if the register hasn't been used or
>altered for a while?


cp subtracts the argument from the accumulator, and sets flags 
accordingly.  The accumulator is not affected.  So: cp 1 is roughly 
equivelent to: a=a-1 : if a=0 then z=1 else nz=1 : a=a+1, but way faster.

• [A83] cp-ing a register
• From: "Brad K." <rncproponent@hotmail.com>

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