Re: AW: [Fwd: Re: EDE - Personal Suggestions and Ideas]

Tommy McCabe
2004-05-27T21:07:42Z

--- David Given <dg@cowlark.com> wrote:
> On Thursday 27 May 2004 08:14, Andrey Romanenko
> wrote:
> > Dan Olson wrote:
> > >Just a thought, maybe if using the 286's features
> is something we want to
> > >do, then why not look into Xenix and any other
> Unix of the era that runs
> > >on the 286 and see if any ideas can be gotten
> from them. I'm sure we're
> > >re-inventing the wheel to some extent.
> >
> > You are talking about copyrighted software with
> closed sources. The
> > total maximum we can found is a binary
> disribution.
>
> You could look at Minix instead; it's open source
> and handles 286 protected
> mode. It uses the 286's MMU to put segments anywhere
> in memory while keeping
> binary compatibility with the 8086; basically, you
> just run Minix on the 286
> and you can use up to 16MB of RAM where on the 8086
> you can use up to 640kB.
> It's completely invisible and works very nicely.

Last time I checked, Minix 2.0.x didn't use 286
protected mode- it had an edition for 386s+ and an
edition for 8086s/286s. 286 protected mode isn't
binarily comptible with real mode or 386 protected
mode- at the very least, the memory handling work
differently. However, there are various tricks to
access over 640KB in real mode, like XMS and EMS.

> --
> +- David Given --McQ-+ "For is it not written,
> wheresoever two or three
> | dg@cowlark.com | are gathered together, yea
> they will perform the
> | (dg@tao-group.com) | Parrot Sketch?" --- _Not The
> 9 o'Clock News_
> +- www.cowlark.com --+
> -
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