The PCI slot which has a Nat. Semi. DP83820. This PCI slot shares the same IRQ as the Onboard HPT372 Raid card, USB controller and multimedia adaptor (According to the bios, however there is no multimedia adaptor I can find!!). So as soon as I put a HDD on the HPT372 the throughput drops through the floor. PIRQ_1 or INTB is the IRQ in question.
The only way I can think of of defeating this issue is to hardwire the riser so as to swap PIRQ_1 to PIRQ_0. Any other thoughts?
Cant update the bios since OEM board and Abit deny it exists.
Cant turn off ACPI, no option in th bios.
Cant put the Gigabit card in another slot as there is only 1 slot.
Oh and btw PIRQ_0 is unused.......at least according to the bios and as far as I can tell. Plus it is a blinking Intel MB so they have 8 IRQs to assign.....rather than the usual 4.
If anyone has any interest
PIRQ_0 = INTA = AGP (Although this seems to get assigned IRQ5 and can be disabled in the bios). PIRQ_1 = INTB = HPT372, PCI SLOT, USB and the aforementioned multimedia adapter. PIRQ_2 = INTC = Intel Pro10/100 on board. No disable option in the bios. PIRQ_3 = INTD = Intel Pro10/100 on board. No disable option in the bios.
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