Re: Linear Feedback Shift Register

From	kegs@provalid.com (Kent Dickey)
Newsgroups	comp.sys.apple2.programmer
Subject	Re: Linear Feedback Shift Register
Date	2024-09-12 03:58 +0000
Organization	provalid.com
Message-ID	<vbtota$2je7$1@dont-email.me> (permalink)
References	<vbb26i$1tf0$1@dont-email.me> <vbd3cl$fbuj$1@dont-email.me> <vbr0q9$3ddnt$1@dont-email.me>

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In article <vbr0q9$3ddnt$1@dont-email.me>, Duhast  <duhast@123gmail.com> wrote:
>On 9/5/2024 4:13 PM, Kent Dickey wrote:
>
>> You should use PEEK(8192+I).  That may be the only problem.
>> 
>
>Ok, it was a brain fart of 4096 vs 8192, and that was corrected, but I 
>still get bad numbers.
>
>I was running Applewin, and it gives me one set of numbers, with missing 
>ones and duplicates.  I ran it under GSplus, and it gave me different 
>numbers, but no missing and one duplicate(but I think I know 
>why(executing loop an extra round)), I then ran it on real //gs hardware 
>and it matches the GSplus output.
>
>Shouldn't it always generate the same sequence with the same seed?  Does 
>the EOR function not work right on a 6502 vs 65816, or is Applewin not 
>right?

Your original code didn't initialize RAND to anything.  So it may vary
between systems.  My modified code initialized it to 1.

Kent

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Thread

Linear Feedback Shift Register Duhast <duhast@123gmail.com> - 2024-09-04 21:39 -0400
  Re: Linear Feedback Shift Register kegs@provalid.com (Kent Dickey) - 2024-09-05 20:13 +0000
    Re: Linear Feedback Shift Register Duhast <duhast@123gmail.com> - 2024-09-10 22:54 -0400
      Re: Linear Feedback Shift Register kegs@provalid.com (Kent Dickey) - 2024-09-12 03:58 +0000
        Re: Linear Feedback Shift Register Duhast <duhast@123gmail.com> - 2024-09-12 19:06 -0400
          Re: Linear Feedback Shift Register D Finnigan <dog_cow@macgui.com> - 2024-09-13 00:49 +0000
  Re: Linear Feedback Shift Register John Ames <commodorejohn@gmail.com> - 2025-01-16 09:36 -0800
    Re: Linear Feedback Shift Register Peter Ferrie <peter.ferrie@gmail.com> - 2025-01-21 15:46 +0000

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