Segmented memory, Was: VFS/ext2fs - large files on the Alpha

Etienne Lorrain (lorrain@fb.sony.de)
Wed, 19 Aug 1998 17:06:42 +0001

Daniel Pittman <danielp@osa.de> a écrit:
> Rogier Wolff wrote:
> [segmneted memory]
> [...]
> > I knew pretty quickly after I got my 640K XT, that I
> > really didn't want to bother with those issues. It is
> > also the main reason that I'm a Linux user since 0.12
> > or something like that.
>
> Segmentation for everything is bad. Segmentation where
> relevant is useful. It's that nice balance that is so
> hard to achieve...

Like using GS as the Graphical Segment for a video
linear framebuffer ?

Variable size protected memory, with MMIO registers,
and traps to emulate in software the accelerated boards -
dual head using FS also... or reserve it for sound.

With (real) video arriving, those two boards will need
quite a lot of memory (buffering hardware MPEG) - so the
OS could support 3*4Gbytes = 12 Gbytes (commercial numbers!).

Just a probably dummy idea,
Etienne.

--
-- The world belong to its organizer.


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