Type: External (2.0 and later) Syntax: COMMAND COMMAND [d:][path] [device] [/P][/E:(size)] [/MSG] [/Y [/C (command)| /K (command)] Purpose: Reloads the DOS command processor (the program that loads the DOS internal programs) or starts a new command processor. Discussion Using this command with no options loads a new command processor with …

Type: External (6.0 and later) Syntax: DBLSPACE DBLSPACE / automount=drives DBLSPACE /chkdsk [/F] [d:] DBLSPACE /compress d: [/newdrive=host:] [/reserve=size] [/F] DBLSPACE /create d: [/newdrive=host:] [/reserve=size] [/size=size] DBLSPACE /defragment [d:] ]/F] DBLSPACE /delete d: DBLSPACE /doubleguard=0|1 DBLSPACE /format d: DBLSPACE [/info] [d:] DBLSPACE /list DBLSPACE /mount[=nnn] host: [/newdrive=d:] DBLSPACE /ratio[=ratio] [d:] …

Type: Internal (2.0 and later) Syntax: CLS Purpose: Clears (erases) the screen. Discussion Erases all characters and graphics from the screen; however, it does not change the currently-set screen attributes. Example Enter cls to clear the screen of everything but the command prompt and the cursor.

Type: External (3.0 and later) Syntax: GRAFTABL [(code page)] GRAFTABL [/status] Purpose: Loads a table of character data into memory (used with color/graphics adapters). (In DOS Version 6, this program is stored on the DOS supplemental disk.) Discussion Used to load the table of displayable characters to those appropriate for …

Type: External (5.0 and later) Syntax: DELOLDOS [/B] Purpose: Deletes all files from previous versions of DOS after a 5.0 or 6.0 installation. Discussion During an upgrade installation of DOS 5.0 or 6.0, your previous version of DOS is stored in a directory named OLD_DOS.1 and on uninstall disks created …

Type: External (5.0 and later) Syntax: EMM386 [on|off|auto] [w=on|off] Purpose: Enables or disables EMM386 expanded-memory support on a computer with an 80386 or higher processor. Do not use this command when Windows is running. Discussion The EMM386 device driver, EMM386.EXE, provides expanded-memory support as well as access to the upper …

Type: Internal (6.0 and later) NUMLOCK=on|off Purpose: Used in the CONFIG.SYS file to specify the state of the NumLock key. Discussion NUMLOCK=on causes the NumLock key to be ON (the number keys on the keypad will be active) upon system start-up. NUMLOCK=off causes the cursor keys on the keypad to …

Type: External (6.0 and later Syntax: MSAV [d:] [/S|/C][/R][/A][/L][/N][/P][/F][/video][/mouse] MSAV /video Purpose: Scans your computer for known viruses. Discussion MSAV will scan the specified drive for known viruses. If no drive is specified, the current drive will be scanned. MSAV creates a CHKLIST.MS file in each directory that is scanned …

Type: External (4.0 and later) Syntax: MEM MEM [/program|/debug|/classify|/free|/module(name)] [/page] Purpose: Displays the amount of installed and available memory, including extended, expanded, and upper memory. Discussion Used to display a variety of types of information about how your system is using available memory. Options /program – Specifies the name, location, …

Type: Internal (6.0 and later) Syntax: MENUCOLOR=textcolor,[background] Purpose: Used in the CONFIG.SYS file to set the colors that will be used by DOS to display text on the screen. Discussion The MENUCOLOR command can only be used inside a menu block within your CONFIG.SYS file. The colors specified will be …