Could someone provide me with some information on this product.
For instance, is it public domain, sharware ??? And most of all
what exactly is it (I know it's a DOS extender and I have a very
rudimentary understanding of that) ??
Dos4GW is the Rational Systems 32-bit dos extender packaged with
the Watcom compilers. It is not shareware. It is however, freely
distributable along with software that requires it to run. It is a
less extensive implementation of Dos4G which is commercially available
from RSI( and not exactly cheap ).
It allows one to write programs on the pc which take advantage of
the 32-bit protected mode available on 386s and up. This provides
a flat 32 bit adress space and eliminates the segmented pointer
hassles previously associated with dos programming. It also provides
virtual memory services.
I don't know the lower memory limit required to run dos4gw, but I have
yet to see a game written in it that requires more than 4Megs to run.
Many require 8+ to run quickly though.