On Mon, Jul 11, 2011 at 6:29 AM, Michele Ghisolfo <ghisolfo.m at gmail.com> 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?
>
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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