From: "L. Lu" <inf28484 AT studserv DOT uni-stuttgart DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: When is a DOS app a "32-bit DOS" app?
Date: Sun, 8 Oct 2000 21:31:02 +0200
Organization: Comp.Center (RUS), U of Stuttgart, FRG
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To: djgpp AT delorie DOT com
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I am not sure but ...

when a program in real-mode involves any 32-bit instructions (i.e. prefixed
by 66H/67H), then it is a 16/32-bit mixed program; if it has only 32-bit
instructions (i.e. all prefixed by 66H/67H), it is a 32-bit program.
but when the program runs in protected mode, it can be 32-bit, 16-bit or
16/32-bit mixed, depended on its segments and operand/address size prefixes.

It may be wrong ... Ask other experts please.

Lu