HelpPC 2.10	Quick Reference Utility	Copyright 1991 David Jurgens
INT 16,4 - Keyboard Click Adjustment (AT+)        AH = 04        AL = 1 for click on           = 0 for click off        - available only on AT and later machines that support the extended          keyboard BIOS
Esc or Alt-X to exit	int 16,4	Home/PgUp/PgDn/End ←↑↓→