0040h:0096h           Keyboard Status and Type Flags

    Length: 1 byte

    This byte holds keyboard status information.

        Keyboard Status Information

        7 6 5 4 3 2 1 0
        x . . . . . . .       Read ID in progress
        . x . . . . . .       Last character was first ID character
        . . x . . . . .       Force Num Lock if read ID and KBX
        . . . x . . . .       101/102-key keyboard installed
        . . . . x . . .       Right Alt key is pressed
        . . . . . x . .       Right Ctrl key is pressed
        . . . . . . x .       Last code was E0 Hidden Code
        . . . . . . . x       Last code was E1 Hidden Code

    Use Int 16h, Service 12h, to obtain some of this information.

    Addresses 0040h:0017h and 0040h:0018h also contain keyboard status
    information.