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ARM version of MSDOS (Announce)

posted by kerravon, Ligao, Free World North, 06.11.2022, 22:28

> > When each of those C functions match directly onto
> > a documented MSDOS interrupt, in my opinion it is
> > MSDOS. If Microsoft had published that in say 1985,
> > would you call it MSDOS then?
>
> For my opinion: no. Even in 1985 there were already different more or less
> compatible versions of DOS. Even the ones highly compatible did not call
> themself MS-DOS, at maximum MS-DOS compatible.
Sure. That is technically correct, and you can
say the same about PC-DOS too.

> For me MS-DOS is a term referring to the original Microsoft codebase and
> binaries.
So MSDOS 5.0 is not real MSDOS, only MSDOS 1.0 is?

Any behavior change, including bug fixes, and including
applications with wild pointers pointing to a specific
byte in MSDOS 1.0 that allows the application to work,
but can't tolerate any change, is a non-MSDOS?

> But I see in the codebase
>
> https://sourceforge.net/p/pdos/gitcode/ci/master/tree/src/int21.c
>
> that there is already some int21 handler stuff. Perhaps it will eventually
> be some sort of binary compatible. At the moment FCB functions are missing
> though :-D .
PDOS/86 is already binary compatible with some
MSDOS applications.

But PDOS/86 only really exists as a curiosity. I'm
more interested in source code compatibility, for
C programs.

And that requires that you first have a C interface,
which Microsoft didn't supply.

Nor did IBM supply, and it was IBM who was first, with
PC-DOS, wasn't it?

Given that neither IBM nor Microsoft are interested in
enhancing "DOS" to give a decent C API that allows
(moving forward) MSDOS to be ported to other platforms
(I think Microsoft does do that for Windows though),
why shouldn't we/I fill in this market gap?

And once the market gap is filled, we can then port
to ARM etc.

I've already got POC well underway to prove that this
is possible.

BFN. Paul.

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