I have the original book, which is an amazing piece of work. Full explanation for the OS, the assembler, and C compiler. The explanations are remarkably clear a

I have the original book, which is an amazing piece of work. Full explanation for the OS, the assembler, and C compiler. The explanations are remarkably clear and approachable and the author has not stinted in providing explanations of his design and put in the extra work to really make this a complete OS implementation with the necessary toolset. At the time (which mostly predates the OSS revolution), this was a rare, rare thing. Tanenbaum's book on Minix is really the only thing that compares, in my opinion. Had the author released the code as OSS long ago, this would be much more widely known and used. But he refused to open it right around the time that Linux was becoming popular. And the rest is history. Still, it's an excellent book and an amazing piece of work.