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List:       freedos-dev
Subject:    [fd-dev] Detecting Real Mode
From:       Alain <alainm () pobox ! com>
Date:       2003-08-01 19:42:54
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Hi all,

I have a problem, maybe someone here can halp me ;-)

I need to detect if I am in real mode or if EMM386 has been loaded.

The problem is that I want to use the RDTSC instruction and in 
early Pentium (i586) it can only be used if emm386 has not been 
loaded. With newer Pentiums (i686) it works ok.
I am running a 16bit mode program (or I am in a 16bit mode ISR).
Ah..! I need to know if any kind of memory manager is loaded, so
I cannot use an instalation check, because I will never finf them all.
I have seen some code to test it, using C++ error-trapping, but I
BC31 doen't have that...

thanks for any help,

Alain

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