Computer Chess Club Archives




Subject: Re: random book moves/ random generator

Author: Tom Kerrigan

Date: 15:15:43 01/13/00

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On January 13, 2000 at 14:00:10, Christophe Theron wrote:

>Be careful with milliseconds on a PC running Windows 9x. Actually the PC timer
>has not changed since prehistory, and it is still producing interrupts at
>18.2Hz. That means that the resolution of time of day under Windows 9x is more
>than 50 milliseconds!
>Under Windows NT I remember this is 10ms. Much better, but stil not accurate to
>the millisecond.

I think the 18.2Hz deal needs to be maintained for backwards compatibility with
DOS programs.

I'm almost 100% certain that GetTickCount() under Windows 95/98/NT has
millisecond accuracy. It's possible that it skips a millisecond once in a while,
but it is frequently incremented by 1.


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