ANSI.SYS--Notes

Remapping extended keys

If you have a keyboard with 101 keys, you may want to use the /X switch to
remap certain extended keys. For example, there are two HOME keys on        
keyboards with 101 keys: One on the numeric keypad and the other in the
block of cursor-control keys. Unless you specify the /X switch, the two HOME
keys are the same to MS-DOS.

Ignoring extended keys

If you have a program that does not correctly interpret input from an
enhanced keyboard, use the /K switch with ANSI.SYS. Your enhanced keyboard
will then use conventional keyboard functions.

Using both the /X switch and the /K switch

You cannot specify ANSI.SYS with both the /X switch and the /K switch.