cctalk Digest, Vol 64, Issue 3
lproven at gmail.com
Sun Jan 5 16:41:34 CST 2020
On Sun, 5 Jan 2020 at 23:30, Guy Sotomayor via cctalk
<cctalk at classiccmp.org> wrote:
> Yes. We first started with Mach 3.0 build MK58. We did our final
> fork at MK68. We made some *significant* changes from what CMU
> had (things like changing mach messages from IPC to RPC) and a
> whole lot of work in the area of scheduling.
Very interesting. If you are allowed to, you should blog about this
somewhere -- it is historic stuff.
> Yes, a lot of things were based on Mach. One OS that you're forgetting
> is OS X. That is based upon Mach 2.5.
Well, firstly, no, I wasn't. I didn't mention OS X, or macOS as it's
called now, because it's based on NeXTstep. It's a later version of
the same OS.
Secondly, AIUI, NeXTstep used Mach 2.5 but one of the changes in Mac
OS X 1.0 is that they moved to Mach 3 and updated the userland from
BSD 4.4-Lite to FreeBSD then-current, hiring Jordan Hubbard to do much
of that work..
> > MkLinux didn't get very far, either, did it?
> I think that was the original Linux port for PPC.
It was, and I think only on Apple hardware. There were a few dev
builds and then it disappeared, IIRC.
Yup, OldWorld-ROM NuBus PowerMacs, and later OldWorld PCI PowerMacs --
but later Linux supported PCI Macs directly.
There were apparently 4 "developer releases", an R1 and an unfinished
R2. Supplanted by Mac OS X, but apparently the Mach work really helped
to get NeXTstep and "Rhapsody" bootstrapped on PowerMacs.
Liam Proven - Profile: https://about.me/liamproven
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