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An application (fast switcher) stays resident before the OS starts, and will be activated using a key combination (for example: Ctrl + Alt + Shift + Esc). After detecting the key combination, the switcher runs and stores all system registers + RAM (maybe use a RAM offset to avoid saving RAM into file) into a file and switches to the other OS register + RAM.
So it would be a fast OS switch without requiring a PC restart.
I want to know what is technically wrong with fast OS switching (remember hibernate).
@Chet A after editing, you're right, I agree. It's valid and should be opened. I apologize for that! – alex – 2010-01-18T20:44:18.313
Even before editing it was a real question. Only a simpleton would assume that it is not a question because it contained no question mark. – Geoffrey Chetwood – 2010-01-18T20:46:04.097
While I agree this feature may not be interesting to many, I do not think it is not a valid question. Just the opposite (from a technical viewpoint). +Open – Rook – 2010-01-18T22:14:10.463
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Isn't that pretty much what OS/2 1.x did on a 286 to run DOS programs in real mode?
http://pages.prodigy.net/michaln/history/os213/index.html