TSR: Difference between revisions
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TSR's were popular in the MS-DOS days as pseudo | '''TSR''''s were popular in the [[MS-DOS]] days as pseudo [[multi-tasking]]. They would 'terminate and stay resident'. You could call them up with a hotkey and you could have them accessible from another program. | ||
These were VERY hard to program as MS-DOS was intended as a single tasking program. | These were VERY hard to program as MS-DOS was intended as a single tasking program. | ||
Many | Many [[debugger]]s ran as TSR's. | ||
I think the most popular TSR was Sidekick from Borland. Sidekick included a calculator, notepad, appointment book, basic terminal program, clip board among other things. | I think the most popular TSR was Sidekick from Borland. Sidekick included a calculator, notepad, appointment book, basic terminal program, clip board among other things. | ||
TSR's typically | TSR's typically [[hook]]ed the [[keyboard]] [[interrupt]] looking for a special sequence that would call them up, and interrupt the underlying program. More sophisticated ones would also hook the timer, and allow the 'foreground' program to continue to execute, a form of multitasking. | ||
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[[Category: DOS Enhancements]] | |||
Latest revision as of 13:28, 1 January 2019
TSR's were popular in the MS-DOS days as pseudo multi-tasking. They would 'terminate and stay resident'. You could call them up with a hotkey and you could have them accessible from another program.
These were VERY hard to program as MS-DOS was intended as a single tasking program.
Many debuggers ran as TSR's.
I think the most popular TSR was Sidekick from Borland. Sidekick included a calculator, notepad, appointment book, basic terminal program, clip board among other things.
TSR's typically hooked the keyboard interrupt looking for a special sequence that would call them up, and interrupt the underlying program. More sophisticated ones would also hook the timer, and allow the 'foreground' program to continue to execute, a form of multitasking.
