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What's that with the CP/M predecessor? Wasn't it RT-11, a one-task RT OS, while RSX-11 was much more complex and supported multitasking? BTW, when DEC switched from PDP-11 line to its 32-bit extention, the VAX, it was RSX-11 developer, Dave Cutler, who was given the task to write a reference OS for the new platform, the famous VAX/VMS. Which later, when Cutler left for Microsoft, resurfaced in a new form as Windows NT.
So it's basically TWO different non-intersecting lineages, as follows: RT-11 -> CP/M -> Q-DOS -> MS DOS -> Windows (classic), while the other line is RSX-11 -> VMS -> OS/2 NT -> Windows NT.
Some footnotes that probably don't belong in the article, but I wanted to write them down anyway:
More tidbits as I think of them...
What's really funny about all those Super CGA cards, is that the most popular of them, the IBM's P Cjr "VGA", managed to enter the public memory under a "Tandy" moniker.
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