[TUHS] UNIX v4 Source Code Commentary - complete book now available

[Cameron Míċeál Tyre via TUHS]

Hello Briam,

Thank you. This is like a Christmas present, even though it is now mid-January. As an amateur, I can only read the content and absorb. I know for sure, having already skimmed through a few pages, that I will enjoy reading it and learn much.

Best regards,

Cameron



-------- Original Message --------
On Monday, 01/12/26 at 21:38 Briam Rodriguez via TUHS <tuhs at tuhs.org> wrote:
Hello,

Following the incredible recovery of the UNIX v4 tape from the University
of Utah last month, I've written a comprehensive line-by-line commentary
on the entire UNIX Fourth Edition source code.

The book covers:
- The kernel (boot, processes, memory management, scheduling)
- The file system (inodes, buffer cache, namei)
- Device drivers (TTY, RK05 disk, character devices)
- User space (shell, utilities, C compiler, assembler)
- Plus appendices with system call reference, file formats, and PDP-11 guide

It's open source (CC BY-NC-SA 4.0) and available on GitHub:

https://github.com/unix-v4-commentary/unix-v4-source-commentary

The PDF is included in the repo for those who just want to read.

It is my sincerest hope that this book can help someone, and I'd
appreciate any feedback (and changes!).

Many thanks to Robert Ricci, and Al Kossow, and everyone involved in
recovering this historic code.

Without that work, this book wouldn't have been possible. Also thanks to
Mr. Warren for letting me in to the mailing list!

Please don't beat me up too bad!

Humbly yours,

Briam Rodriguez