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Hi Hpa and all I am confused about some function of pxelinux and gpxelinux/gpxe. 1, after I read the document (http://edgyu.excess.org/ols/2008/H%20Peter%20Anvin%20-%20x86%20network%20bo oting%3a%20integrating%20gPXE%20and%20PXELINUX.pdf), I knew there are two major module in standard gPXE, PXE BC and UNDI. And I can understand why I need to produce different boot file for different NIC from http://rom-o-matic.net/, because the output file contain different UNDI. But...

...sing a couple of definitions in dmi_processor.h, specifically, the "long mode" flag. I need to use this flag to determine whether a machine is 64-bit capable or not. There is a great web page explaining the "long mode" flag at: http://www.mega-tokyo.com/osfaq/Tell%20me%20about%20x86%2064%20bits%20CPU%20... >From the web site I see the following: "How do I detect if the CPU is 64 bits ? You can find that out by checking CPUID. All AMD64 compliant processors have the longmode-capable-bit turned on in the extended feature flags (bit 29) in EDX, after calling CPUID with...

Jean-Marc, Are you sure that you don't need to add just -msse to enable the intrinsics rather than a full fledged -march=pentium3? I did some playing around and I can get intrinsics code to compile with -march=i686 -msse on linux with that. Check out: