Re: what is put in Vendor ID and Device ID?

["Monish Shah" <monish@poboxes.com>]

> From: Dave New <NewD@esi.com>

> > From:	Mark Galecki [SMTP:marek@greenspring.com]

> > The PCI spec, rev 2.1 implies that Vendor ID and Device ID belong to a
PCI
> > "device" or "controller", which is a component that confirms to
electrical
> > reqs of a local PCI bus.  But an empty PGA does not by itself conform
to
> > anything particular.  I have to program it to conform.  I have to make
the
> > "PCI function".  So does empty PGA qualify as a device and therefore
> > should
> > have its ID's present in Vendor and Device ID?  
> > 
> 	[Dave New]  When you say "empty PGA" I believe you mean
> 	that it has some basic PCI agent functionality, but
> 	so far, it can be treated as some kind of generic
> 	conduit to some addon circuitry...

I don't think he meant that.  An empty PGA is a bunch of gates with no
paritcular functionality.  So, if you program it to be a PCI device, you
should use your own vendor ID and device ID, not that of the PGA vendor. 
In fact, there is no guarantee that the PGA vendor even has a vendor ID. 
Even if they do, they manage their own device IDs internally, so you can't
just make on up on their behalf.  So, from a practical perspective, there
is no option but to use your own IDs.

Monish Shah
Ascent Software