Access device on LPC bus? Mark McDougall <markm[ at ]vl.com.au> 11.07.2007 07:41:18 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

Re: Access device on LPC bus? Mark Roddy <markr[ at ]hollistech.com> 11.07.2007 11:16:21 Mark McDougall wrote: [Quoted Text] > 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 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