Type: Internal (2.0 and later)
Purpose: Used in the CONFIG.SYS file to specify the command interpreter that DOS should use.
In most cases DOS will use the command interpreter COMMAND.COM. If you are using another command interpreter, or if DOS is not in the root directory, you can use the SHELL command to tell DOS the name and location of the other command interpreter. For more information on the SHELL command, refer to Chapter 6, Tips for Advanced Users. Option parameters – Any parameters required by the specified command interpreter.
To use a command interpreter called NDOS.COM, located in the ALTDOS directory, enter the following line in your CONFIG.SYS file: