Marco,
I have seen this same behavior on some Dell machines. They don't even have a reset button, which would let you restart the clock after the FPGA is loaded.
Tony Clark
> -----Original Message-----
> From: Marco Brambilla (Wireline) [mailto:marco-tpa.brambilla@st.com]
> Sent: Wednesday, June 28, 2000 9:57 AM
> To: pci-sig@znyx.com
> Subject: devices not seen, fpgas not getting the clock
>
>
> Hi all,
>
> As someone else on the list, I too had some issues with clock not seen
> by fpgas.
>
> In our case we have many HP PCs which are working fine.
> In only one PC (a P3 500) we saw that during the initial boot
> phase the
> clock is present on all 3 PCI slots on the motherboard.
>
> After some seconds (5 to 30) the clock remains good on
> populated slots,
> while it is removed from empty slots.
> At least this is what our lab people told me.
>
> The PC is thus fully functional, but we have a development board on
> which our chip is implemented in fpga.
> For debugging reasons we cannot program the FPGA from the external
> memory, but from the jtag cable.
> This means that our board can never be seen by the
> motherboard, because
> at startup it was not operating, so the clock is removed from
> the slot.
>
> Has anyone ever heard of such a behaviour ?
> Is this "clock removing" feature really present ? (and can it be
> disabled) ?
>
> Thanks for any advice.
>
> Marco Brambilla
>
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