Re: Obtaining PCI ROM addresses and sizes?

Am Fri, 07 Mar 2008 05:32:13 GMT schrieb Tim Roberts:

> Alex Buell  <spamtrap@[EMAIL PROTECTED]
> wrote:
>>
>>I've been trying to obtain the addresses of PCI extension ROM and their
>>sizes on 16 bit MSDOS, whether they're enabled or not. Does anyone have
>>example sources on how to do this? The examples I've seen only works in
>>protected mode. Thanks!
> 
> Few PCI cards have ROMs any more.  Your graphics card is just about the
> only one left.
> 
> The only way to get this information authoritatively is to enumerate
> through the configuration space of all of the devices on your PCI bus. 
You
> can do that using the PCI BIOS interrupt, INT 1A.  The expansion ROM
base
> address is in the configuration space at offset 30h.

Ralf Browns RBdualVGA(dual093s.zip) shows the handling of two PCI-bus
SuperVGA cards.

Dirk