Re: A83: Re: CP?


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Re: A83: Re: CP?




Excellent!  Thanks!

>From: "David Phillips" <electrum@tfs.net>
>To: <assembly-83@lists.ticalc.org>
>Subject: A83: Re: CP?
>Date: Wed, 21 Oct 1998 17:23:19 -0500
>Reply-To: assembly-83@lists.ticalc.org
>
>
>There are only flags to worry about:  the carry flag and the sign flag.  
You
>will probably not need the sign flag for anything, unless you using 
signed
>numbers.  The carry flag is set if the operation produced a "carry", 
meaning
>that the result overflowed and had to be truncated.  The sign flag is
>exactly the same way, except that it is for signed numbers, and the 
carry
>flag is for unsigned:
>
>ld a,5
>cp 6     ; 5 - 6 = -1 = 255
>
>The carry flag will be set.
>
>ld a,9
>cp 1    ; 9 - 1 = 8
>
>The carry flag will be cleared.
>
>
>--
>David Phillips <electrum@tfs.net>
>ICQ: 13811951
>AOL/AIM: Electrum32
>86 Central: http://www.tfs.net/~electrum/
>
>-----Original Message-----
>From: Henry Davidowich <rdaneelolivaw@hotmail.com>
>To: assembly-83@lists.ticalc.org <assembly-83@lists.ticalc.org>
>Date: Wednesday, October 21, 1998 5:06 PM
>Subject: A83: CP?
>
>
>>
>>How does the "cp" affect the flag register?  I understand the zero 
flag
>>concept, but what about other items (such as... the carry flag)?
>>Thanks.
>>
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>


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