When you opened a program, that program took up your entire screen. Want to use another program? You’d need to close the current program and enter the command to open the other program. To get around this limitation, DOS provided a “terminate and stay resident” (TSR) function. A program that supported this feature could hook into a keyboard shortcut. You’d press the appropriate keyboard shortcut and the current program would shut down and stay in memory. The other program would then load itself from memory. The program isn’t actually running in the background. Instead, it’s shut down and there’s a quick way to relaunch it. ![]() This is significantly different from modern shells like the ones found on Linux, which allow you to run programs and services in the background, use multiple text-mode terminals, and do other advanced things. #Last microsoft ms dos 6.22 download download#ĭOS was nowhere near as powerful as that.ĭOS didn’t really support hardware devices in the way operating systems support hardware today. ![]()
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