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32-bit MSDOS (Announce)

posted by kerravon E-mail, Ligao, Free World North, 29.06.2021, 05:16

> > I guess I could create an INT 31H that just
> > redirects you to INT 21H if that would help.
>
> I think that DPMI API INT31 is something different that cannot be simply
> redirected to INT21. But maybe HDPMI/CWSDPMI source could be ported some
> way to PDOS. But I'm not sure what apps will then use DPMI as PDOS native
> apps are 32b and don't need DPMI and standard 32b DPMI apps for DOS cannot
> run in PDOS. But maybe PDOS could load e.g. DJGPP 32b apps? I don't know if
> there's some hard obstacle why not as they are also 32b apps but requires
> DPMI API...
Just thinking about this some more.

If I'm going to get anything else to work, the
thing that interests me the most is HX.

I would be happy to implement some subset of
DPMI purely for use by HX. If someone else
uses it too, they're on their own.

But at what level does INT 31H make sense in
a PDOS/386 environment? There is no 16-bit
DOS waiting to be called, and if you attempt
to do that, you will fail.

So what sort of INT 31H call could HX do that
makes sense in a "pure" 32-bit environment?

I would be happy to translate an attempt to
call a non-existent 16-bit API back into a
32-bit API call. After all, the INT 21H
functions match already. If I have missed
any INT 21H functions, that's not a problem,
I'm happy to add anything important.

I'm happy to provide dummy functions in
INT 31H to satisfy HX too.

BFN. Paul.

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