The description below is from the book DOS the
Easy Way by Everett Murdock Ph.D.
for information about downloading the book.
Type: Internal (6.0 and later)
Purpose: Used in the CONFIG.SYS file to create a multilevel menu
which you can select start-up options .
The SUBMENU command can only be used within a menu block in your
file. Up to nine SUBMENU commands are allowed in each menu block. When
the menus created with SUBMENU, you can return to a higher level menu by
pressing the Backspace key.
For more information about the SUBMENU command, see Chapter 6, Tips for Advanced Users, in the downloadable book DOS the Easy Way.
blockname - Specifies the name of the submenu DOS will display when
this menu item is selected. A blockname can be up to 70 characters long but
cannot include the following characters: \ / . ; = [ ].
menutext - Indicates the text you want displayed for this menu line.
You can use up to 70 characters, including spaces. If you do not specify the
menu text, DOS will display the blockname in the menu.
If you wanted to create a menu of options to load from the CONFIG.SYS
startup, you could include a SUBMENU command in place of a MENUITEM
within the main menu. For example, you might want to open a submenu
DEVICES when the third option in the main menu is selected. To do this
you would enter the following
menuitem=minimum, Start with Minimum Configuration
menuitem= maximum, Start with Maximum Configuration
submenu=devices, Load Devices
The menu options defined in the menu block named DEVICES would be
option three of the main menu was selected. You could return to the main
menu by pressing the Backspace key.