NMI/parity error

["Mikhail Matusov" <matusov@squarepeg.ca>]

Hi all,

I am having a weird problem in a cPCI system, which I don't know how to
debug. Here it goes:

The system is a Teknor chassis with a Teknor cPCI-MXS64 CPU + a peripheral
card that I designed, running Windows2000. The peripheral card has the PLX
PCI9054 bridge and the TMS320C6203 DSP chip. The host can talk to the host
port of the DSP through the PCI bridge. Now the problem: if the DSP does not
supply READY signal to the PCI controller for too long (why it does so is a
different story) the whole system crashes into the Blue Screen saying
something like NMI/parity error.

I was able to reproduce exactly this kind of crash by forcing the PLX chip
to generate SERR signal, however neither SERR nor PERR appear to be asserted
during the real crash.

Any ideas are highly appreciated.

Thanks,
============================
Mikhail Matusov
Hardware Design Engineer
Square Peg Communications
Tel.: 1 (613) 271-0044 ext.231
Fax: 1 (613) 271-3007
http://www.squarepeg.ca