The C> prompt that appears when you load MS-DOS from the hard disk tells you that drive C, your hard disk, is the current drive (also called the default drive). The current drive is the one that MS-DOS uses for all commands unless you specify a different drive. For example, if the current drive is drive C and you type the name of a program, MS-DOS searches drive C for the program.

If you want to run a program or find a data file on a different drive, you must specify the name of that drive. You can do this either by logging onto that drive (making it the current drive) or by including the drive letter with the filename.

To log onto another drive, type the name of the drive followed by a colon. Then press Enter. For example, if the current drive is C and you want to log onto drive A, type A: and press Enter. Your screen now displays the A> prompt, showing that you are operating from drive A. Drive A continues to be the current drive until you log onto a different drive or turn off or reset your computer.

To access a program or file on another drive without first logging onto that drive, specify the drive identifier (the name of the drive followed by a colon) along with the filename. For example, if you are logged onto drive C and you want to run a program called WP that is stored on drive A, type A : WP and press Enter. MS-DOS runs the program on drive A but remains logged onto drive C.

Note

You can reverse the drive identifiers for the internal 3 ‘/a-inch and the external 5 ‘I+inch diskette drives by setting DIP switch SW2-2 to OFF. See “Setting the DIP Switches,” in Appendix A.

Using MS-DOS With Your Computer 3-3