Hi Andrew, Thanks for your information, it leaded me to find the new dmidecode tool support this bit. Although I found the B.13 BIOS of Intel DQ57TM board doesn't expose this UEFI support bit even on UEFI mode.
Anyway, it's still very useful to me to identify legacy mode! Thanks a lot! Joey Lee 於 二，2013-09-03 於 08:53 -0700，Andrew Fish 提到： > Maybe SMBIOS tables. > > https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdePkg/Include/IndustryStandard/SmBios.h > UefiSpecificationSupported in in the BIOS characteristics extension byte 2 of > the BIOS Characteristics (type 0) record. > > There is an SMBIOS dumper in the shell > > Thanks, > > Andrew Fish > > > On Sep 3, 2013, at 3:42 AM, joeyli <[email protected]> wrote: > > > Hi experts, > > > > I am trying to identify legacy mode of UEFI BIOS between pure legacy > > BIOS on OS. > > > > Simply say: > > Does it possible to identify this machine is running UEFI BIOS when user > > switch to legacy mode? > > > > My original idea is through some ACPI tables, e.g. UEFI, FPDT and BGRT, > > one of them show up then I think this machine has UEFI BIOS. > > > > But, I found there have some machines don't expose those tables when > > switched to legacy mode. It hard to distinguish legacy mode of UEFI and > > pure legacy BIOS. > > > > Does there have any standard method or reliable way to identify legacy > > mode? Appreciate for any idea! > > > > > > Thanks a lot! > > Joey Lee > > > > > > ------------------------------------------------------------------------------ > > Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! > > Discover the easy way to master current and previous Microsoft technologies > > and advance your career. Get an incredible 1,500+ hours of step-by-step > > tutorial videos with LearnDevNow. Subscribe today and save! > > http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk > > _______________________________________________ > > edk2-devel mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/edk2-devel > > > ------------------------------------------------------------------------------ > Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! > Discover the easy way to master current and previous Microsoft technologies > and advance your career. Get an incredible 1,500+ hours of step-by-step > tutorial videos with LearnDevNow. Subscribe today and save! > http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk > _______________________________________________ > edk2-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/edk2-devel > ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk _______________________________________________ edk2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/edk2-devel
