From mboxrd@z Thu Jan  1 00:00:00 1970
From: wkt at tuhs.org (Warren Toomey)
Date: Thu, 5 Dec 2019 19:10:25 +1000
Subject: [COFF] Xinu
Message-ID: <20191205091025.GA31876@minnie.tuhs.org>

Wesley wrote:
>  I would second that. His Xinu book was one of the two that helped
>  demystify operating systems for me.
> Wesley Parish

I've moved this over to COFF as it's only tangentially related to Unix.

As a undergraduate I found Doug Comer's Xinu book in the library. At the
time, I was learning C but I only had an Apple ][+ clone which didn't
have a C compiler.

Therefore (obviously), I hand-recoded Xinu in assembly, built a 555
timer circuit, connected it to the IRQ line on the 6502 and got Xinu
up and running (with a shell, with my own ls, with redirection etc.)
on my Apple ][+ clone:

ftp://minnie.tuhs.org/pub/apple2/apple2xinu.tar.gz

Yes, crazy I know.

Cheers, Warren