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2-4 DOS Basics
Moving around the Directory Tree
When the computer is first turned on, ROM-DOS boots into the root
directory. From the root, you can change to any other directory by means
of the CD (CHDIR) command. At any given time, ROM-DOS considers
you to be in a specific directory, referred to as the current directory. You
can make the computer automatically move to a different directory upon
system startup by adding the CD command to your AUTOEXEC.BAT file.
Refer to the description of the CD command later in this manual for more
information on changing the current directory.
Drive Specifications
Since ROM-DOS can store and retrieve information from more than one
disk drive, disk drives are given unique names such as A:, B:, C:, and so
on. By convention, floppy disk drives are identified as drive A: and drive
B:. On systems having only one physical floppy drive, ROM-DOS can
treat the one drive as either A: or B:.
The hard drive, if your system has one, is identified as drive C:. Hard
drives can be partitioned (divided) into smaller sections with the FDISK
utility. Under DOS 6.22, disks exceeding 8GB must be partitioned into
two or more areas, with a maximum size of 2GB per partition but will
never use more than the first 8GB of the drive. DOS 7.1 does not have
these restrictions. A separate drive letter identifies each hard-drive
partition. The first partition is drive C:, the next drive D:, and so on. The
highest available drive identifier is the letter Z.
To refer to the C: drive, enter
c: on the command line
Note: The drive name may be entered in either uppercase or lowercase.