Uwe Klein wrote:
> John Allen wrote:
>> On a Windows XP system, the front-side bus spread spectrum option had
>> no evident effect, unlike the choice of HAL (hardware abstraction
>> layer) which was critical (on an nForce2 motherboard).
>
> is that the issue connected with apic routing of timer interrupts?
> Symtom is you clock will start to race due
> to some interrupts being counted twice.
In this case, yes, there was a correlation with APIC:
With APIC: Halaacpi.dll: uses the Real Time Clock (RTC) to generate clock
interrupts
Without APIC: Halacpi.dll: uses the 8254 Programmable Interval Timer (PIT) to
generate
clock interrupts
For me, NTP worked well with Halacpi.dll (non-APIC), and not at all with
Halaapic.dll (APIC).
I didn't investigate further - swapping HALs in Windows XP is a high-risk
operation, and I
no longer use this motherboard.
John
--
John Allen
Bofferdange, Luxembourg
allen{at}vo{dot}lu
http://www.homepages.lu/allen
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