Mail Archives: djgpp/1996/05/06/13:55:25
On Mon, 6 May 1996, David Hampson wrote:
> Can anyone tell me what DOS4GW is?
DOS4GW is a DOS-extender, i.e. the program that fools MS-DOS
and allows your 32-bit protected code to use 'so-called extended
memory, (i.e. above 1M)' under MS-DOS. go32 (DJGPP), run386
(PharLap?) does the same.
In more details, from the point of MS-DOS' view it starts
"dos4gw <yourprog>" as odinary MS-DOS program with a parameter.
Extender loads your program and become and interface between
the operating system and the program (when program needs
video, disk, memory, etc.)
DOS4GW was used by ID-software for DOOM, DOOM2 (as far as I
> Is it some kind of graphics interface for DPMI?
No, it's not a graphics interface (see above) - maybe better,
more than that interface (see above).
Watcom's Fortran/C/C++ compilers (v 9.5 and up) this extender
gives you good chance to write graphics code that works under
DPMI server (i.e. in DOS-sessions under Win, OS/2, etc) both in
window and full-screen modes. Bad that Watcom is very expensive.
> If so will DJGPP ever incorporate it or
No comments :-) Does go32-v2 works bad? I suppose it is better.
> is it very 'un-free' software?
It seems to me that I saw this extender in a couple of
freeware/shareware products. Maybe it is free (see my remark
on DOOM(s) above).
> David Hampson
> David AT johnhamp DOT demon DOT co DOT uk
Best regards, Maksim
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