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Subject: Re: Virtual Memory

Author: Dann Corbit

Date: 20:17:01 01/18/00

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On January 18, 2000 at 23:12:59, Robert Hyatt wrote:

>On January 18, 2000 at 22:42:25, John Wish wrote:
>
>>Is there a way to expand hash table sizes using virtual memory from your' hard
>>drive for software such as Fritz 5.32, Rebel 10 (or century), or Chessmaster?
>
>
>It is easy to do, just run the hash size up larger than real memory.  The down
>side is that it will kill your performance and probably reduce the skill level
>by 500+ rating points.
>
>Worst case will see your node rate drop to near zero when it is time to clear
>the thing.

Hey!  There's an idea.  People always want to know how to dumb down chess
programs.   Just allocate about twice physical ram in hash.

Of course, when the system wants memory to redraw a screen or something, there
may be a few little "quirks" but at least it will make the programs a heck of a
lot dumber.

Conversely, we might allocate a *single* hash entry.  Either method ought to
dumb the program down just a touch.
;-)




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