actually the genesis of MS-DOS is a little more convoluted ...

Tim Paterson
>From Wikipedia, the free encyclopedia
Tim PatersonBornJune 1, 1956Occupationcomputer
programmer<http://en.wikipedia.org/wiki/Computer_programmer>
, software designer
<http://en.wikipedia.org/wiki/Software_designer>WebsitePaterson
Technology <http://www.patersontech.com/>

*Tim Paterson* (born 1956) is an
American<http://en.wikipedia.org/wiki/United_States>
 computer programmer <http://en.wikipedia.org/wiki/Computer_programmer>,
best known as the original author of
MS-DOS<http://en.wikipedia.org/wiki/MS-DOS>,
the most widely used personal computer operating
system<http://en.wikipedia.org/wiki/Operating_system> in
the 1980s.

Paterson was educated in the Seattle Public Schools, graduating from
Ingraham High School in 1974. He attended the University of
Washington<http://en.wikipedia.org/wiki/University_of_Washington>,
working as a repair technician <http://en.wikipedia.org/wiki/Technician> for
The Retail Computer Store in the Green Lake area of Seattle,
Washington<http://en.wikipedia.org/wiki/Seattle,_Washington>,
and graduated *magna cum laude<http://en.wikipedia.org/wiki/Magna_cum_laude>
* with a degree in Computer Science in June 1978. He went to work for Seattle
Computer Products <http://en.wikipedia.org/wiki/Seattle_Computer_Products> as
a designer and engineer. He designed a schematic of Microsoft's Z-80
SoftCard <http://en.wikipedia.org/wiki/Z-80_SoftCard> which had a Z80 CPU
and ran the CP/M <http://en.wikipedia.org/wiki/CP/M> operating system on an
Apple II.

A month later, Intel released the
8086<http://en.wikipedia.org/wiki/Intel_8086> CPU,
and Paterson went to work designing an
S-100<http://en.wikipedia.org/wiki/S-100_bus> 8086
board, which went to market in November 1979. The only commercial software
that existed for the board was a standalone version of Microsoft
BASIC<http://en.wikipedia.org/wiki/Microsoft_BASIC>.
The standard CP/M operating system at the time was not available for this
CPU and without a true operating system, sales were slow. Paterson began
work on QDOS (Quick and Dirty Operating System) in April 1980 to fill that
void, copying the
APIs<http://en.wikipedia.org/wiki/Application_programming_interface>
of
CP/M from sources including the published CP/M manual so that it would be
highly compatible. QDOS was soon renamed as
86-DOS<http://en.wikipedia.org/wiki/86-DOS>.
Version 0.10 was complete by July 1980. By version 1.14 86-DOS had grown to
4,000 lines of assembly
code.[1]<http://en.wikipedia.org/wiki/Tim_Paterson#cite_note-0> In
December 1980Microsoft <http://en.wikipedia.org/wiki/Microsoft> secured the
rights to market 86-DOS to other hardware manufacturers.

While acknowledging that he made 86-DOS compatible with CP/M, Paterson has
maintained that the 86-DOS program was his original work and has denied
allegations that he referred to CP/M's code while writing
it.[2]<http://en.wikipedia.org/wiki/Tim_Paterson#cite_note-1> When
a book appeared in 2004 claiming that 86-DOS was an unoriginal "rip-off" of
CP/M,[3] <http://en.wikipedia.org/wiki/Tim_Paterson#cite_note-2> Paterson
sued the authors and publishers for
defamation<http://en.wikipedia.org/wiki/Defamation>
.[4] 
<http://en.wikipedia.org/wiki/Tim_Paterson#cite_note-3>[5]<http://en.wikipedia.org/wiki/Tim_Paterson#cite_note-4>
The
judge found that Paterson failed to 'provide any evidence regarding “serious
doubts” about the accuracy of the Gary
Kildall<http://en.wikipedia.org/wiki/Gary_Kildall> chapter.
Instead, a careful review of the Lefer notes ... provides a research picture
tellingly close to the substance of the final chapter' and the case was
dismissed on the basis that the book's claims wereconstitutionally
protected<http://en.wikipedia.org/wiki/First_Amendment_to_the_United_States_Constitution>
opinions
and not provably
false.[6]<http://en.wikipedia.org/wiki/Tim_Paterson#cite_note-5>

Paterson left SCP in April 1981 and worked for Microsoft from May 1981 to
April 1982. After a brief second stint with SCP, Paterson started his own
company, Falcon
Technology<http://en.wikipedia.org/w/index.php?title=Falcon_Technology&action=edit&redlink=1>,
which was bought by Microsoft in 1986. Paterson did a second stint with
Microsoft from 1986–1988 and a third stint from 1990-1998. During his third
stint at Microsoft, he worked on Visual
Basic<http://en.wikipedia.org/wiki/Visual_Basic>
.

After leaving Microsoft a third time, Paterson founded another software
development company, Paterson
Technology<http://en.wikipedia.org/w/index.php?title=Paterson_Technology&action=edit&redlink=1>,
and also made several appearances on the Comedy
Central<http://en.wikipedia.org/wiki/Comedy_Central>
 television <http://en.wikipedia.org/wiki/Television> program
*Battlebots<http://en.wikipedia.org/wiki/Battlebots>
*. Paterson also races rally cars in the SCCA<http://en.wikipedia.org/wiki/SCCA>
 Pro 
Rally<http://en.wikipedia.org/w/index.php?title=SCCA_Pro_Rally&action=edit&redlink=1>
series,
and even engineered his own trip
computer<http://en.wikipedia.org/wiki/Trip_computer> which
he integrated into the axle of a four-wheel drive Porsche
911<http://en.wikipedia.org/wiki/Porsche_911>
.
[edit<http://en.wikipedia.org/w/index.php?title=Tim_Paterson&action=edit&section=1>
]
see also

http://www.patersontech.com/dos/micronews/paterson04_10_98.htm

and it will give more insight into the history behind DOS and early
MicroSoft.



On 30 July 2011 04:47, Angus Scott-Fleming <angu...@geoapps.com> wrote:

> **
> Well, two days ago.
>
>  ============= Included Stuff Follows =============
> Microsoft's MS-DOS is 30 today • reghardware
>   Kudos to QDOS
>   By Tony Smith
>   27th July 2011 06:00 GMT
>
>  MS-DOS is 30 years old today. Well, kind of. On 27 July 1981, Microsoft
> gave the name MS-DOS to the disk operating system it acquired on that day
> from Seattle Computer Products (SCP), a hardware company owned and run by a
> fellow called Rod Brock.
>
>  ============= Included Stuff Ends =============
> More here with links:
> http://www.reghardware.com/2011/07/27/ms_dos_turns_30/
>
>  Makes me feel OLD.
>
>  Angus
>
>
> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~
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