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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 |
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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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