If I remember correctly UNIX version 6 could run on any PDP-11. UNIX version 7 required a PDP-11/45 or later model because it assumed the separation of instruction (code) space from data space that...
There are a lot of information about PDP-11 in the Internet. It is the first computer, UNIX runs on. Just search for PDP-11 to find general information and links, and then
If you want to study a modern Unix derived from AT&T Unix code (SVR4), you might have a look to Solaris Internals: Solaris 10 and OpenSolaris Kernel Architecture...
I would suggest to start with classic. Old UNIX kernels are very easy to understand und to hack. You can find e.g. UNIX v6 or v7 on TUHS archive, Supnik's PDP-11 simulator (simh) and take Lion's...
At the time of 1rst edition, there were many more affordable processors than INTEL on the market and so the book was so you could develop an OS with what you found...
I read the book back in 1992 I...
minix is a very basic OS, up to you to make it more rich.. I think it is the best start for anyone wanting to understand what is going on in a basic OS since if you follow the book you should end...