Hi all
I have an Asus S8600.
Mobile PIII 800Mhz + 192M RAM.
If i select "Local APIC support on uniprocessors" the kernel while booting
says there's no APIC present.Why?
I know the same problem with some other laptops.
Others detect it.
At home my Athlon Tunderbird + Asus A7V133-C with local APIC enabled detects
it but doesn seem to use it ...
cat /proc/interrupts
CPU0
0: 375529 XT-PIC timer
1: 7452 XT-PIC keyboard
2: 0 XT-PIC cascade
5: 113246 XT-PIC bttv, eth0
8: 2 XT-PIC rtc
10: 144373 XT-PIC EMU10K1
11: 382444 XT-PIC nvidia
12: 153864 XT-PIC PS/2 Mouse
14: 12346 XT-PIC ide0
15: 12 XT-PIC ide1
NMI: 0
ERR: 0
Anyway why do I need local APIC :) ?What are the advantages?Links?
Thank you very much for your kindness
Best Regards,
Jo?o Seabra
On Fri, 2002-12-13 at 11:56, Jo?o Seabra wrote:
> I have an Asus S8600.
> Mobile PIII 800Mhz + 192M RAM.
> If i select "Local APIC support on uniprocessors" the kernel while booting
> says there's no APIC present.Why?
> I know the same problem with some other laptops.
> Others detect it.
Because there isn't one present 8)
The APIC although on processor isnt present in all processors - at least
not all older ones. Its not a required CPU feature so not every
processor vendor includes it on all their processors.
Alan
the intel 440mx chipset that the asus is based on doesn't include an apic.
an apic is for doing multiprocessor interupt managemnet. across multiple
I/O subsystem each can have it own set of interupts...
On Fri, 13 Dec 2002, Jo?o Seabra wrote:
> Hi all
>
> I have an Asus S8600.
> Mobile PIII 800Mhz + 192M RAM.
> If i select "Local APIC support on uniprocessors" the kernel while booting
> says there's no APIC present.Why?
> I know the same problem with some other laptops.
> Others detect it.
>
>
> At home my Athlon Tunderbird + Asus A7V133-C with local APIC enabled detects
> it but doesn seem to use it ...
>
> cat /proc/interrupts
> CPU0
> 0: 375529 XT-PIC timer
> 1: 7452 XT-PIC keyboard
> 2: 0 XT-PIC cascade
> 5: 113246 XT-PIC bttv, eth0
> 8: 2 XT-PIC rtc
> 10: 144373 XT-PIC EMU10K1
> 11: 382444 XT-PIC nvidia
> 12: 153864 XT-PIC PS/2 Mouse
> 14: 12346 XT-PIC ide0
> 15: 12 XT-PIC ide1
> NMI: 0
> ERR: 0
>
> Anyway why do I need local APIC :) ?What are the advantages?Links?
>
> Thank you very much for your kindness
>
> Best Regards,
>
> Jo?o Seabra
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