[MiNT] Some thoughts about a new MMU manager

[Patrice Mandin <pmandin@caramail.com>]

Hello,

I would like to talk about MMU use in MiNT. I think this
part needs to be rewritten. It would be nice to have it
running on all CPU (030,040,060), so on all Atari and
clones.

I am thinking of it because it would be nice to have the
mmap and munmap system calls. They are useful to provide
swap memory and shared libraries.

External video cards needs also to map their frame buffer
(4Mb for example) in CPU space via a small window (64 Kb
for example). And the MMU can be used to transparently
change this, providing the full fb to a fixed address.

Work that could be done on it could be made available to
TOS programmers via a small resident, and a cookie-jar
entry. So maintainers of video card drivers could use it
wisely.


--
Patrice Mandin

Mail: pmandin@caramail.com
Web:  http://www.multimania.com/pmandin

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