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A better one to use would be SERR#.  In most systems, it is configured to
generate an NMI.  If it doesn't it may be disabled via software or linked to
an error recovery routine in HA systems.  -- BrooksL

> -----Original Message-----
> From: Bob Smith [mailto:bsmith@sudleyplace.com]
> Sent: Friday, 16 February, 2001 11:57
> To: pci-sig@znyx.com
> Subject: NMI on PCI
> Back in the good old ISA days (x86 architecture), I used to connect a
> wire to pin A1 in an ISA slot and run it through a push-to-ground
> switch to generate an NMI for which my debugger would be listening. 
> This is a great way to break into an otherwise dead system in an
> attempt to figure what went wrong.
> Recently, I bought a motherboard with no ISA slots, so I'm trying to
> figure out how to do this in a PCI slot.  I have found pin B40
> (PERR#) which looks like in might do the trick, but I'm not an
> engineer, so I'm asking you folks.
> 1.  Is there any harm to the system or PCI card in attaching a
> push-to-ground switch onto an (active) PCI slot?
> 2.  Might this actually generate a Parity Error (NMI - INT 02h)?
> 3.  If not, how else might I accomplish this?
> 4.  Are there any PCI cards on the market which have such a
> capability built in?
> _______________________________________________________________
> Bob Smith - bsmith@sudleyplace.com - http://www.sudleyplace.com
> a.k.a.      bsmith@qualitas.com    - http://www.qualitas.com