[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Subsystem IDs, again
Peter N. Glaskowsky wrote:
> .......
>
> What I don't know, and hopefully someone can just answer this without
> creating any new confusion, is, is there such a mechanism? Does Windows
95
> look at the results of the PCI BIOS scan at all? Or only if it trusts the
> motherboard and BIOS vendor? Or what?
>
> . png
FYI:
The latest version (V0.9) of the Microsoft PC97 Design Guide includes in
the PCI
chapter a new statement regarding the Subsystems IDs :
"Support of these registers requires non-zero values to be populated for
both
the Subsystem ID and Subsystem Vendor ID. These values must be populated
prior
to the system BIOS or system software accessing the PCI configuration
space, as
stated in the PCI2.1 specification. The recommended method for populating
these
registers is by using serial ROMs.
The exception to this requirement are PCI-PCI bridges and core chip sets."
You can find this document at:
http://www.microsoft.com/hwdev/desguid/pc97des.htm
Didier Lachieze
Hewlett-Packard
Ä „ s