From: Damian Yerrick <MYNAMEISd_yerrick AT hotmail DOT comNO2CANNEDHAM>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Uptime and entropy in DOS
Organization: Pin Eight Software  http://pineight.8m.com/
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References: <38A82321 DOT 952B55DA AT americasm01 DOT nt DOT com> <Pine DOT SUN DOT 3 DOT 91 DOT 1000215095332 DOT 23996N-100000 AT is>
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NNTP-Posting-Date: Tue, 15 Feb 2000 13:47:54 GMT
Distribution: world
Date: Tue, 15 Feb 2000 13:47:55 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

On Tue, 15 Feb 2000 09:53:49 +0200 (IST), Eli Zaretskii
<eliz AT is DOT elta DOT co DOT il> wrote:

>
>On Mon, 14 Feb 2000, Campbell, Rolf [SKY:1U32:EXCH] wrote:
>
>> > BSD random() seems to use the Apple RNG
>> >   x = (x * 16807) % ((2 << 31) - 1);
>> > to play with the seed.
>> 
>>     I believe that algorithm is not very good at making random
>>     numbers.
>
>If this is used only to randomize the seed, then it is okay.
>
>But I don't see the above calculation anywhere in the sources of
>`random.c', at least as it appears in DJGPP v2.03.

I saw it in the FreeBSD sources.  It replaces
  x = (x * 1103515245) + 12345;
in the seed generator.

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