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Path: utzoo!watmath!clyde!burl!hou3c!hocda!houxm!ihnp4!ihnss!knudsen
From: knudsen@ihnss.UUCP
Newsgroups: net.micro
Subject: Re: Small micro OS for Education
Message-ID: <2006@ihnss.UUCP>
Date: Fri, 6-Apr-84 14:27:35 EST
Article-I.D.: ihnss.2006
Posted: Fri Apr  6 14:27:35 1984
Date-Received: Sat, 7-Apr-84 04:55:17 EST
Organization: AT&T Bell Labs, Naperville, IL
Lines: 11

If you want cheap hardware and a REAL OS for educational tinkering,
get a bunch of Radio Shack Color COmputers with one disk drive and
the OS-9 system.  Inspired by UN*X, OS9 supports multi-tasking,
multi-users, I/O redirection, etc.  It is well documented and fairly
easy to tinker with, being entirely modular in construction.
An assembler is included, and a FULL C comp9iler is available for $100.
SOme possible disadvantages:  source not supplied (but disassemblers are
readily available); no swapping or paging (Version II shuffles & relocates
using an MMU, but needs bigger 6809 system than Coco).
However, OS9 uses interrupts, timers, shcedulers with variable task priority,
etc.  Lots to play with in one semester, eh?  mike k