Welcome to the Wonderfully Ancient World of TurboDOS
A Multiprocessor Operating System for Z-80-based computers


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This website is a Work In Progress dedicated to TurboDOS; A Multiprocessor Operating System designed for multiprocessor networks of Z-80-based computers. TurboDOS is designed as a CP/M-compatible operating system.

"TurboDOS was known, when CP/M ruled, as the only serious opponent to MP/M-II, the multi-user, multi-tasking version of CP/M." - E. Roche

CP/M (Control Program for Microcomputers) was (and is) an operating system similar to MS-DOS but which predated MS-DOS, and which is in fact the operating system that MS-DOS descended from. But CP/M is much more than simply an early version of MS-DOS and CP/M is very much alive in online communities of Enthusiasts and Others who still use CP/M in Old (and sometimes newer) Computers and Emulators.

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Website History

In 2009, Mr. Emmanuel Roche, a regular of the comp.os.cpm Newsgroup, decided to search for this "Lost DOS" (TurboDOS) and found a PDF of a TurboDOS Newsletter which mentioned Dr. R. Roger Breton (below).


Dr. Rene Roger Breton (above), now a patent paralegal, has an extensive computer engineering background. Between 1986 and 1994, he worked as a computer programmer, technical writer, and engineer in various jobs. Dr. Breton is a published author of TurboDOS Z80 Assembly Language Programming and TurboDOS 8086-80186-80286 Assembly Language Programming.

E. Roche managed to find him, and Roger agreed to release his 500-page book about TurboDOS; Z-80 ASSEMBLY LANGUAGE UNDER TurboDOS.

In 2009 M. Roche hoped that "this masterwork will lead to the ressurrection of TurboDOS." My hopes were and are slightly less ambitious; I hope you enjoy your visit to the TurboDOS Museum. Roche forwarded the initial material for this website and Roger forwarded his book. I rummaged around a found some other bits and pieces (including Piergiorgio Betti's Site). And since the TurboDOS Museum is a Work in Progress and Roche continues to contribute, it will be expanded over time.

Since 2009, Mike Busch, co-founder of Software 2000 and creator of TurboDOS, has advised that Software 2000, Inc. is no longer enforcing its copyright on TurboDOS, so effectively it is now "free". While some "resurrection" of TurboDOS has been underway in "its old image", Software 2000 no longer have source code. So future development of TurboDOS is limited to what can be accomplished through the recovery and analysis and use of the material and data that remains.


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Caveat Emptor

This website is maintained by Bill Buckels. Its contents are either owned and Copyrighted by Bill Buckels or provide their own licencing from their respective Copyright Holders. In any case you are free to download from here.

It is provided in the hope that it will be interesting or useful or both, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. In particular, Bill Buckels has no warranty obligations or liability resulting from its use in any way whatsoever.