How to run DOS program method in Windows XP

In the Windows XP command prompt, type: start/seperate to run the program, you can run the corresponding DOS program. The function of the parameter separate is to start a 16-bit program in a separate memory space, and the shared parameter is to start a 16-bit program in the shared memory space. When the DOS program is running, we can also switch between full screen and window by pressing the <Alt+Enter” key.
Upgrade the system to WindowsXP, but some old software needs to run under DOS, and there is no pure DOS in WindowsXP. We can use the Start command to solve this problem.
The format of the Start command is: Start/[ ,null,null,3],Option]program[arg]
There is a Start.exe program in the Command subdirectory of Windows, which can be used to open a program or file. For example, type start otepad in the start run and start directly after the carriage return. This program, to open the Docname.txt file, you can type start Docname.txt at the command prompt; in addition, it can also launch multiple applications at the same time, bringing a lot of convenience to our work. Let's take a look at it! Enter Start/? at the prompt to get help for this command.