Makes a backup copy of one or more files. (In DOS Version 6, this program is stored on the DOS supplemental disk.)
Used from the DOS prompt or in a batch file or in the CONFIG.SYS file to set (or display) whether or not DOS should check for a Ctrl + Break key combination.
Used in the CONFIG.SYS file to set the number of disk buffers (number) that will be available for use during data input. Also used to set a value for the number of sectors to be read in advance (read-ahead) during data input operations.
CALL [d:][path]batchfilename [options]
Calls another batch file and then returns to current batch file to continue.
Displays the current code page or changes the code page that DOS will use.
CHDIR (CD) [d:]path
Displays working (current) directory and/or changes to a different directory.
CHKDSK [d:][path][filename] [/F][/V]
Checks a disk and provides a file and memory status report.
CHOICE [/C[:]keys] [/N][/S][/T[:]c,nn] [text]
Used to provide a prompt so that a user can make a choice while a batch program is running.
Optimizes disk performance by reorganizing the files on the disk.
DEL (ERASE) [d:][path]filename [/P]
Deletes (erases) files from disk.
Deletes all files from previous versions of DOS after a 5.0 or 6.0 installation.
DELTREE [/Y] [d:]path [d:]path[…]
Deletes (erases) a directory including all files and subdirectories that are in it.
Used in the CONFIG.SYS file to tell DOS which device driver to load.
Like DEVICE, DEVICEHIGH is used in the CONFIG.SYS file to tell DOS which device driver software to use for devices; however, this option is used to install the device driver into the upper memory area.
DIR [d:][path][filename] [/A:(attributes)] [/O:(order)] [/B][/C][/CH][/L][/S][/P][/W]
Displays directory of files and directories stored on disk.
DISKCOMP [d:] [d:][/1][/8]
Compares the contents of two diskettes.
DISKCOPY [d:] [d:][/1][/V][/M]
Makes an exact copy of a diskette.
Used in the CONFIG.SYS file to specify the memory location for DOS. It is used to load DOS into the upper memory area and to specify whether or not the upper memory blocks will be used.