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From: "Tonu Aas" <tonu AT ids DOT ee>
Newsgroups: comp.os.msdos.djgpp
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Subject: Re: uclock_t & gcc 3.0.4 on Windows-2000
Date: Wed, 24 Apr 2002 11:25:52 +0300
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> C/C++ Perfometer at http://alexvn.freeservers.com/s1/perfometer.html
>    has been compiled with gpp-2.95.3  and works OK on Windows98.
>   One of get-time-function()'s is uclock().
>
> I compiled this program with gpp-3.0.4 (with some gpp-3.0.4-related
updates) on Windows2000.
> However, it doesn't work on Windows2000 because of uclock().


Your problem is that 8254 emulation on W9x & NT,2000 is different.

    On W9x family 8254 counter overrun and tick counter in 0x46c are
related.
On NT family they are not ! On NT tick can occur on any 8254 counter value
:(
But its happens every time on same counter value after NT startup :)
So, you just must find out that value and do some corrections into 8254
counting.
Not so easy and not nice at all. It's MS and anything not-GUI doesnt work
right.

Tõnu.