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Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.
Vintage OS: One Man Unix
14. March 2010 - 14:45 — admin
A spirit of an ancient time: Single-user single-task Unix-like OS from 80's for a 6809 MCU... and revitalized later for a 68000 MCU.
I love such stories... Steve Hosgood, author of the One Man Unix, says: "I went off and built myself a 6809 based computer with 64K of RAM, a 360K floppy disk drive and an RS232 interface which could drive a glass-TTY. Please remember that this was 1982. Hard disks, megabytes of RAM and other familiar modern things were a long way off. After going through the usual hard work of writing a BIOS complete with an S-records downloader, I was in a position to write myself an operating system. Preliminary work on OMU started in late 1983. My earliest surviving printouts of the sources on yellowed, faded lineprinter paper show that the bulk of the work on OMU dates from March/April/May 1984."
Thanks to Steve, we can experiment with his OS freely. Both versions, 6809 and 68000, are available at his pages.
Link: OMU - One Man Unix