The Origins of DOS

[Allison]

>
>Subject: RE: The Origins of DOS
>   From: "Chandra Bajpai" <cbajpai at comcast.net>
>   Date: Sat, 28 Oct 2006 11:10:20 -0400
>     To: "'General Discussion: On-Topic and Off-Topic Posts'"	<cctalk at classiccmp.org>
>
>
>How big was the TRS-80 Market to support all thoses DOSes?

In the first year of sales the total was over 250,000 units.  I'd suspect
that by in year three (1981) there were at least 25-50,000 of those capable of 
supporting a disk and possibly more.


The big three of disk based systems were:

CP/M   (multiple platforms)
Apple  (appledos)
TRS-80 (TRSDOS, Newdos, LDOS)
NS* Horizon (s100) NS*DOS (also cp/m)

Not in any order. There wer others but volumes were generally far lower.


>I remember when NewDOS/80 and I just remember it being fast.  Any idea who
>wrote that?

That was the Apparat version if memory serves.

Allison

>-Chandra
>
>
>-----Original Message-----
>From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
>On Behalf Of Fred Cisin
>Sent: Friday, October 27, 2006 10:24 PM
>To: General Discussion: On-Topic and Off-Topic Posts
>Subject: Re: The Origins of DOS
>
>On Fri, 27 Oct 2006, Warren Wolfe wrote:
>> [TRS-DOS]
>>     It was its own universe, Jim.  The links and questionable parentage
>> of the original version of DOS are tied directly to CP/M, which was the
>> first O/S for personal computers that any significant number of
>> businesses embraced.  And, Windows came out of the DOS world, and now
>> dominates as few products have dominated before.  (Note: I am NOT
>> claiming this is a GOOD thing.)
>>
>>     From what I can tell, TRSDOS was not a rip-off of anyone's software,
>> and nobody bothered to rip it off, so it's pretty much out of the world
>> of O/S scandal.
>
>There WERE several imitators of TRS-DOS (although still for TRS-80),
>including NEWDOS, DOSPLUS, and the semi-legitimate offspring LDOS.
>
>> It actually was pretty decent, and had a few ideas of
>> merit that didn't make it into the mainstream world for a while.  It was
>> just totally tied to Radio Shack computing, and suffered a mortal wound
>> when IBM came out with their PC.  No fault of its own.
>
>Rasio Shack AVOIDED expanding TRS-DOS into other semi-related hardware
>platforms.
>
>--
>Grumpy Ol' Fred     		cisin at xenosoft.com