Michal Jaegermann wrote:
>
> On Fri, Nov 03, 2000 at 04:24:02PM -0700, Maurice Hilarius wrote:
> > I remember watching Michal making dark mutterings about some of the
> > Soundblaster PCI cards last year. Essentially they "assumed" that PCI would
> > only use 16 bit addressing space..
>
> I think that you are thinking about four bits for interrupts thus
> making only 0 to 15 available. (Did one ever heard about a computer
> with such weird IRQ assignments like these?
> ............
> 20: 144686 sym53c8xx
> 44: 351038 eth0
>:-)
>
> Sound cards are infamous for cutting PCI spec corners. Such card which
> got IRQ 37 will think that is really on 5. Oops! Other devices seems to
> be quite a bit better in this respect.
>
It appears my dual PIII motherboard also uses interrupts above 15:
CPU0 CPU1
0: 12903677 14055458 IO-APIC-edge timer
1: 1815 1917 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
12: 522 96 IO-APIC-edge PS/2 Mouse
13: 0 0 XT-PIC fpu
14: 33744 26522 IO-APIC-edge ide0
15: 60 51 IO-APIC-edge ide1
18: 138908 135458 IO-APIC-level eth0
20: 152 152 IO-APIC-level ide4, ide5
22: 23588 23422 IO-APIC-level ide2
So I suppose it would have similar problems with such cards. Course
it doesn't do sound or modems.... Only disks.
Seems odd though the distribution on my UP2K is quite
uneven while the PIII board is very even.
UP2K:
CPU0 CPU1
1: 144 0 keyboard
8: 1686590099 1686589932 timer
12: 0 0 PS/2 Mouse
14: 462584 0 +ide0
19: 45 0 aic7xxx
23: 22879 0 ide5
27: 6310020 0 ide2, ide3
47: 125946091 0 eth0
Possibly due to the kernel levels. I use 2.4.test9
on the SMP PIII.
Wes
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