3 ms·
in ver 6.0 you could switch between tasks in dosshell That was task swapping, not multitasking. All but the currently-executing task were interrupted, written
by georgieporgie 16y ago
in ver 6.0 you could switch between tasks in dosshell
That was task swapping, not multitasking. All but the currently-executing task were interrupted, written out to disk, and expunged from memory.
- bad_user 16y agoNot completely true. In MS-DOS you could terminate a program, but make 64K of its memory resident. And then you could program a time interrupt handler to wake it up and do stuff periodically. That's how some viruses worked btw :-)
- gaius 16y agoTSR, that was called, terminate and stay resident. It was a legitimate technique, software like Sidekick used it http://en.wikipedia.org/wiki/Borland_Sidekick http://en.wikipedia.org/wiki/Borland_Sidekick