A85: Random

To: assembly-85@lists.ticalc.org
Subject: A85: Random
From: GrafixxHQ <GrafixxHQ@aol.com>
Date: Sun, 4 Jan 1998 21:09:28 EST
Organization: AOL (http://www.aol.com)
Reply-To: assembly-85@lists.ticalc.org


I used this random routine in a Usgard game I am making:

Random:
   ld a,r
   srl a
   and 3                 ;I want    -1,   0, or 1
   jr z,Random
   dec a
   dec a
--------------
The problem is that 1 comes up nearly all the time.
Is there a way to make it more random, and give all the same probablity?
Also, it seems that if I push the right arrow key, it never returns -1.

I added "sub a" before the random, in case storing the key in the A register
was affecting the outcome, but that still didn't do anything.

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