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Programming > Assembly x86 > Re: Obtaining P...
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Re: Obtaining PCI ROM addresses and sizes?

by Dirk Wolfgang Glomp <spamtrap@[EMAIL PROTECTED] > Mar 7, 2008 at 09:07 AM

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
 




 7 Posts in Topic:
Obtaining PCI ROM addresses and sizes?
Alex Buell <spamtrap@  2008-03-06 21:13:34 
Re: Obtaining PCI ROM addresses and sizes?
Tim Roberts <spamtrap  2008-03-07 05:32:13 
Re: Obtaining PCI ROM addresses and sizes?
Dirk Wolfgang Glomp <  2008-03-07 09:07:29 
Re: Obtaining PCI ROM addresses and sizes?
"H. Peter Anvin"  2008-03-24 11:56:52 
Re: Obtaining PCI ROM addresses and sizes?
Alex Buell <spamtrap@  2008-03-07 13:03:11 
Re: Obtaining PCI ROM addresses and sizes?
"Benjamin David Lunt  2008-03-07 23:56:10 
Re: Obtaining PCI ROM addresses and sizes?
Tim Roberts <spamtrap  2008-03-09 00:49:44 

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tan12V112 Fri Jul 25 14:44:56 CDT 2008.