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As I can tell from my experince, the factor depends a lot from the host
speed and emulation / virtualisation software. I saw speed differences
from about a bit faster ( > 1.0) up to 10 times.

Most emulators / virtualizer are now close to 1 (as of QEMU and VMware).
There is no real / perfect solution to have a precise clock in a VM.
This is because it would have a big performance penalty. Most people use
a time server in the VM to correct the shift.

Another thing when running FreeDOS in a VM is the CPU usage of the host
machine. It will be go to 100% and the CPU fan will start. I use always
the FDAPM with the parameter APMDOS so the HLT command is used (I think
it's the instruction). With this, the host CPU is about 4% usage on my
1GHz WinXP machine, like with any other program when idle. It think it
would be a good idea to include the loading of FDAPM in the FreeDOS
distro, as I think a lot of the people will try out FreeDOS in a VM.

Sincerly

Andreas

Arkady V.Belousov wrote:
> Hi!
> 
> 19-Июл-2006 17:49 [EMAIL PROTECTED] (Andreas Bollhalder) wrote to
> [email protected]:
> 
> AB> for two days and I had to read about 70 mail... I personally use QEMU
> AB> and VMware Server for testing purposes and timers often run too fast. I
> AB> remember that I saw this effect in Bochs too.
> 
>      Does this mean, that when you run some program, which shows clock (for
> example, Norton and Volcov Commander may show clock), then this clock is too
> fast? And how it fast - 1.5 logical seconds per real second? 2 second per
> second? 100 seconds per second?
> 
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