Michele, Some time ago, SCO made its source code available under an "Ancient UNIX" license. That is also very close to SVR4. I don't have the details at hand, but perhaps someone on this list does. Is there a reason you need to see the source code specifically for SVR4? Cheers, Jim ----- Original Message ----- From: "Michael Kerpan" To: "Michele Ghisolfo" Cc: TUHS at minnie.tuhs.org Sent: Monday, July 11, 2011 8:42:45 AM Subject: Re: [TUHS] SVR4 x86 -- Sources On Mon, Jul 11, 2011 at 6:29 AM, Michele Ghisolfo wrote: >  Hi, > >  I'm currently reading J. Lion's commentary of Unix Code Level Six.  It > is the most useful commentary to operating system kernel I have ever > read. > >  It would be really useful to also have the source code of SVR4 kernel > for Intel x86.  Does anyone have that? > > _______________________________________________ > TUHS mailing list > TUHS at minnie.tuhs.org > https://minnie.tuhs.org/mailman/listinfo/tuhs OpenSolaris is derived from SVR4 and much of the userland stuff is still quite similar to the original release. Sadly, System V as a whole is still regarded as a commercial product and no source is available. If you want the source code for a decent early-90s Unix implementation, I'd take a look at 4.4BSD. It's not SVR4, but it's from the same era and has many of the same abilities. Mike _______________________________________________ TUHS mailing list TUHS at minnie.tuhs.org https://minnie.tuhs.org/mailman/listinfo/tuhs