Epson Equity IIe, User Manual

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Specifying the drive designator
If you want to access a program or file on another drive without
first changing the current drive, type the drive designator along
with the filename. For example, if you are logged onto drive A
and want to use a file named PROGRAM on drive B, type
and press
Enter.
MS-DOS loads and executes
the file named PROGRAM from drive B but stays logged onto
drive A.
Types of MS-DOS Commands
Each MS-DOS command is either internal or external. Internal
commands are built into MS-DOS; so you can use them any
time after MS-DOS has been loaded into memory. External
commands are separate files which MS-DOS must be able to
find before it can execute the command. If it cannot find the
file, MS-DOS displays an error message.
If you have a hard disk and you installed MS-DOS according to
the instructions in your MS-DOS Installation Guide, most
external commands are stored in a subdirectory named DOS on
the hard disk (unless you specified a different name when you
installed MS-DOS). T he external commands CONFIG.SYS,
AUTOEXEC.BAT, and COMMAND.COM are stored in the
root directory. (For information on directories, see “Using
Directories,” later in this chapter.) MS-DOS automatically finds
any external commands you use in the DOS subdirectory or the
root directory because the installation process has set a path to
them. (For information on setting paths, see “Using
Pathnames,” later in this chapter.)
Using MS-DOS with Your Equity IIe 4-5