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Shuttle SK41G and IRQ sharing



 
 
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  #1  
Old October 6th 04, 11:26 AM
dxrd
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Default Shuttle SK41G and IRQ sharing

Hi!

I bought a m-audio audiophile 24/96 soundcard for my PC and the manual
states that I should have one free IRQ to use with the card.

The problem is, the BIOS IRQ sharing puts every device to IRQ 10.

This is normal, I know, but how can I force a device to use a spesific
IRQ - for example IRQ 5 ?

Normally, I wouldn't care about the IRQ issue,
but the sharing affects to the PCI access speed, so my cards
performance in recording is less than optimal.

I would really appreciate your help.

Regards;
Mikko
Finland
  #3  
Old October 7th 04, 10:58 AM
dxrd
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George Macdonald wrote in message . ..

How do you know the IRQ sharing is affecting access speed? AFAIK, when the
mfr specifies that a "free IRQ" needs to be dedicated for their device,
that's for a non-APIC operating environment... e.g. Win98, where the old
i8259 IRQs are used... and of course their mappings through to PCI.


Really ? I think that wether the device is in APIC control or not,
it's beneficial to assign an IRQ to the device. I think this in
a "traditional" PC way.

Anyway, the card shares IRQs with my USB port, and I've got USB-
keyboard and trackball, and that seems to confuse system quite a
lot.


If you're using WinXP, it is an "APIC enabled" operating system and
interrupts are handled quite differently.


Yes, it seems to be, more or less . I'm using Linux as my primary
OS and it would be nice to hear from some Linux guru, how Linux
handles devices, and can I control the APIC behaviour somehow
manually,which devices go to which IRQ and so on.

My previous Hoontech soundcard worked much better with the same
hardware when I first installed it, and it somehow got it's own
IRQ.

Both cards have the same codec (ICE1712) that's why the logic.


-Mikko
 




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