Access device on LPC bus?

  • Thread starter Thread starter Mark McDougall
  • Start date Start date
M

Mark McDougall

Hi,

I'm trying to work out how to access a device on the LPC bus (via ICH7).
The device in question is the system BIOS. I need to be able to read the
entire contents of the BIOS flash device directly from the device.

I know how to read the run-time, decompressed BIOS image from system
memory, via the SMBIOS pointers. This is no good to me.

I (guess I) need to tickle the ICH7 LPC controller?!?

How does one achieve this under WinXP?

Regards,
Mark
 
Mark said:
Hi,

I'm trying to work out how to access a device on the LPC bus (via ICH7).
The device in question is the system BIOS. I need to be able to read the
entire contents of the BIOS flash device directly from the device.

I know how to read the run-time, decompressed BIOS image from system
memory, via the SMBIOS pointers. This is no good to me.

I (guess I) need to tickle the ICH7 LPC controller?!?

How does one achieve this under WinXP?

Regards,
Mark
Click to expand...
If what you want to read is a properly enumerated device in the ACPI
namespace then you can write a function driver for it. You may have to
replace an existing (and probably null) system device. See the ACPI
subkey of Enum in the registry.

--

=====================
Mark Roddy DDK MVP
Windows Vista/2003/XP Consulting
Hollis Technology Solutions 603-321-1032
www.hollistech.com
 
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