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ARM version of MSDOS (Announce)

posted by kerravon, Ligao, Free World North, 18.01.2024, 18:52

New version just released:

https://github.com/o-ksi-d/Pdos-PdAndro/releases/tag/rel0.57.0

Combine that with ucarm.zip from http://pdos.org and
you now have a C90 compiler (gccarm - a modified gcc 3.2.3).

I also have the start of a gcca64.zip available.

A question though.

On my Pinebook Pro using ucarm.zip (bios.exe), I was
required to put in a 0.02 second delay before
executing any executable code (just placed into
memory (BSS)). Otherwise it would sometimes work,
sometimes crash. It's like either Linux or the
ARM chips is caching something and the cache
needs to be cleared.

I have an ARM v7 netbook and 0.02 seconds wasn't
enough. I added a full 1 second and have had no
problem since.

It's very fast to compile C programs regardless.
Given that this is now running native ARM.

So - is this the new DOS? If Microsoft had ported
MSDOS to the ARM processor, would that be possible
and legitimate?

ie why are people here running DOS - for the
simplicity? Is this the equivalent? If you
write your programs in C90 they are actually
portable to anywhere. So basically everything
is MSDOS if you stick to C90.

BFN. Paul.


P.S. 64-bit ARM and x64 is starting now too as proof
of concept - can be obtained from the same place as
UCARM at http://pdos.org

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