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IBM PC MS-DOS DOS/4GW Protected Mode Run-time Rational Systems


DOS/4GW Protected Mode Run-time



This is a list of IBM PC MS-DOS games that employ Rational Systems' DOS/4GW Protected Mode Run-time. DOS/4GW is a DPMI-based DOS Extender for i80386 CPUs and above that allows DOS games to run in true 32-bit Protected Mode, which run-times are extremely fast and do not require EMS or XMS memory managers.

DOS/4GW increased PC game performance, overcame the 640K conventional RAM barrier and allowed DOS games to address up to 64 megs of RAM.

DOS/4GW became mainstream via Doom of 1993 and was commonly employed until 1997.


Some MS-DOS games embed DOS/4GW into their exectuables, such as Heretic and Hexen

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