Date: Tue, 25 Jan 2005 09:11:05 +0000 From: Antony T Curtis <antony.t.curtis@ntlworld.com> To: Justin Walker <justin@mac.com> Cc: FreeBSD Architecture <freebsd-arch@freebsd.org> Subject: Re: Continuation of the Mach Microkernel Message-ID: <1106644266.57883.3.camel@pcgem.rdg.cyberkinetica.com> In-Reply-To: <1355BB97-6E8C-11D9-B0E6-00306544D642@mac.com> References: <A88CBA6A-6BF6-11D9-8C84-00112433589E@comcast.net> <20050125035045.GA27895@gurney.reilly.home> <1355BB97-6E8C-11D9-B0E6-00306544D642@mac.com>
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On Mon, 2005-01-24 at 20:46 -0800, Justin Walker wrote:
> On Jan 24, 2005, at 19:50, Andrew Reilly wrote:
>
> > On Fri, Jan 21, 2005 at 04:51:51PM -0500, Nicholas Ink wrote:
> >> Has anyone tried running the Mach microkernel with a new version of
> >> FreeBSD, like 5.x? I'm working on a project involving that
> >> microkernel, but I'm concerned that it won't work with newer versions
> >> of FreeBSD.
> >> Does anyone know anything or know of any resources that might assist
> >> me?
> >
> > How about the Darwin codebase? They recently upgraded their
> > user-land to FreeBSD 5.something, I believe.
>
> Nope. The Darwin kernel uses some updates from FreeBSD 4.x, not 5.x.
> It isn't a wholesale import of FreeBSD, though. The device driver
> model is completely different, as is the interface between the network
> stacks and the devices.
>
> Also, just to be clear, Darwin doesn't use Mach as a microkernel. The
> implementation is more like Mach 2.x than Mac 3.x (even though the Mach
> bits are based on Mach 3.x): there is no support for running "guest
> OSs" in Darwin.
There was a project someone had called something like MachBSD or xBSD
which had a Mach microkernel and a FreeBSD 4.x userland - it had a
project goal to reimplement FreeBSD but with a Mach-based kernel. The
site disappeared sometime last year - it had a couple of ISOs but didn't
have complete source online IIRC.
--
Antony T Curtis, BSc. UNIX, Linux, *BSD, Networking
antony.t.curtis@ntlworld.com C++, J2EE, Perl, MySQL, Apache
IT Consultancy.
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