http://blogs.msdn.com/ntdebugging/archive/2008/03/06/disassemble-the-mbr.aspxUPDATE: This is why we *LOVE* our readers! After posting a 32-bit disassembly of 16-bit MBR code, I was gently informed of my misstep by three sharp-eyed readers. I’ve corrected the original post below. Thanks go out to Ramon Sola, Jeroen Frijters anden-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/ntdebugging/archive/2008/03/06/disassemble-the-mbr.aspx#8695554Sun, 06 Jul 2008 03:21:38 GMT91d46819-8472-40ad-a661-2c78acb4018c:8695554DriverDude<p>Why not use debug.exe ? It's included even in Vista and disassembles 16-bit code just fine.</p>