OPENCORES.ORG

Hi everyone,

Tom,
It can be several things. I usually start looking at any PCI problem by
running PciView or a similar software. Basically it shows whether the card
under test can respond to configuration cycles and what is programmed into
its config space.

Another thing to think about is whether your FPGA is loaded by the time when
BIOS is trying to configure it. I believe this used to be a problem with
older motherboards, especially built to PCI 2.1, where I beleive reset time
was frequently too short for any FPGA to load.

Finally, the problem might be related to signal integrity... Slowing down
the PCI clock might help to find this. Some of the motherboards have such a
feature.

/Mikhail

----- Original Message ----- 
From: <tomko81@h...>
To: <cores@o...>
Sent: Tuesday, December 30, 2003 3:43 AM
Subject: [oc] PCI card can't work in different motherboard

> Hi everyone,
>
> i have just finish implementing a Slave PCI into a FPGA on a PCI board.
> And this core seems work fine. Work fine means the OS can find the
> new hardware component and ask for the driver, also can read / write
> data by using WinDriver. But when i plug this card onto another
> motherboard which is with on-board lan card. The OS can't discover this
> new hardware and the original on-board lan card on this mothercard has
> disappeared(it don't show up in the software). However, my core do not
> have problem in every motherboard without on-board lan card.
>
> I find it very strange and i don't know why. Is the PCIBIOs on different
> motherboard has difference in configurating the device? Or the memory
> range i declare in my core has exceed the range that the mother board
> can give to my hardware?( i just declare 256 K in my hardware). Or
> anything crush in the interrpt?
> Is it possible that a PCI card can work in one motherboard but fail in
> another one?
>
> Thank you very much and any reply will be appreciated.
>
>
> Regards,
> TOM
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