INT 16 - KEYBOARD - GET ENHANCED KEYSTROKE (enhanced kbd support only)
AH = 10h
Return: AH = BIOS scan code
AL = ASCII character
Notes:  if no keystroke is available, this function waits until one is placed
in the keyboard buffer
the BIOS scan code is usually, but not always, the same as the hardware
scan code processed by INT 09.  It is the same for ASCII keystrokes
and most unshifted special keys (F-keys, arrow keys, etc.), but
differs for shifted special keys.
unlike AH=00h, this function does not discard extended keystrokes
SeeAlso: AH=11h,AH=20h

See also: 1600

1610 - KEYBOARD - GET ENHANCED KEYSTROKE (enhanced kbd support only)