[TUHS] COHERENT sources released under 3-clause BSD license.

[Warner Losh]

There’s a PS2 kernel directory in one of the files. This is a 3.x based kernel and runs on 286. There are some vestiges of 8086, but I don’t know how well it will work. It looked fairly incomplete to me…

Warner

> On Jan 7, 2015, at 12:02 PM, Michael Kerpan <mjkerpan at kerpan.com> wrote:
> 
> My main interest is actually in pre-386 code. I'd love to see how a Unix-like system could be made to work on an 8086 or a 286. Did any of that code survive to the 4.2 era or were things 32-bit only by that point?
> 
> Mike
> 
> On Jan 7, 2015 1:46 PM, "Andrzej Popielewicz" <andrzejpopielewicz at gmail.com> wrote:
> * Warner Losh <imp at bsdimp.com> [2015-01-06 11:09:58]:
> 
> >
> > > On Jan 6, 2015, at 10:04 AM, Dan Cross <crossd at gmail.com> wrote:
> > >
> > > On Tue, Jan 6, 2015 at 11:48 AM, Rico Pajarola <rp at servium.ch> wrote:
> > > adding the list back
> > >
> > > On Tue, Jan 6, 2015 at 10:42 AM, Michael Kerpan <mjkerpan at kerpan.com> wrote:
> > > This is a cool development. Does this code build into a working version of Coherent or is this mainly useful to study? Either way, it should be interesting to look at the code for a clone specifically aimed at low-end hardware.
> > >
> > > Unknown (to me, anyway).  Steve said he had intended to organize and catalog the code at some point, but that he hasn't gotten around to it (and not to hold one's breath).  I gathered that the tar ball he provided is a snapshot of (a subset of?) the MWC development disks at the time he was asked to create the archive.  To that end, I suspect that if one were sufficiently motivated one *could* use it to build a distribution of COHERENT, but I suspect you'd have to know quite a bit about their internal development practices and release processes to do so successfully; knowledge that may very well have been lost over time.  Perhaps some motivated person will be able to reverse engineer it, though I suspect it's more useful as a case study than as working code.
> >
> > Looking at the tarballs and the tarballs inside, this is a mess. It looks like it is all there, but there???s multiple copies of things that are almost identical, RCS files that are mostly enough, but not completely enough, etc. Plus they were using gcc 2.5.1 for compiling things, so using a more modern compiler likely will result in ???difficulties???. There???s some docs laying around, but I haven???t read through them all. The collection needs curating TLC...
> >
> > Warner
> >
> 
> 
> 
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> Hi,
> They have used also gcc-2.5.6 , which is in TUHS archives , I believe.
> I have ported gcc-2.8.1,2.95.3,3.2.3 and 4.2.x. Almost 95% of kernel sources
> compiles well with these newer compilers.
> Andrzej
> 
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