Patrick Haller wrote in a message to Jerry McBride:

 PH> Hi Jerry!

 PH> [..]
 JM> By the way, this is a GREAT little bit of code to test prospective
 JM> motherboards. Also, this will crash (lockup) WINNT, WIN95 DOS/WINDOWS
 JM> and DOS if the motherboard is of inferior quality.

 PH> Not NT. NT does not grant a DOS session IOPL. Therefore it
 PH> actually does emulate the complete DOS inclusive non-harmful
 PH> IOPL instructions. This is the reason for NT being so
 PH> stable, so slow and so incompatible with existing
 PH> DOS-/Win16-Software.

Cool. Thanks for the info, Pat.


Jerry McBride

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