[A83] Re: check if positive


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[A83] Re: check if positive




To answer the original question, to check if A is positive:
 or a
 jp p,Positive
 ;negative
Positive:
 ;positive
You could also do this, which is slightly more efficient:
 cp $80
 jr c,Positive
 ;negative
Positive:
 ;positive

To check if A is larger than (or equal to) B:
 cp b
 jr nc,Larger
 ;smaller
Larger:
 ;larger

-----Original Message-----
From: assembly-83-bounce@lists.ticalc.org
[mailto:assembly-83-bounce@lists.ticalc.org]On Behalf Of Ronald Teune
Sent: Thursday, May 31, 2001 7:56 AM
To: assembly-83@lists.ticalc.org
Subject: [A83] Re: check if positive



>OK Xavier I understood al of what you said. but how can you define a string
>(db. " Hi there",0) in one byte, or is that one byte just a pointer?
>And that " space to let in a program" I understood neither.
>
>Thanks in advanxce
>p.s. " does anybody know how you can check if a variable is bigger than an
>other variable",0

I don't know, but you can write a small C program and comepile it with z88dk
and look at the z80 code.

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References: