INT 48 - KEYBOARD - CORDLESS KEYBOARD TRANSLATION (PCjr)
	AL = scan code???
Note:	This interrupt may be un-initialized (0000h:0000h) on old machines.
	  This should be checked before calling or hooking this vector.
	MS-DOS/PCIBM PC DOS 3.3x-4.x KEYB hooked the INT 48h handler. For AL <= 80h
	  it checked that either ALT and neither CTRL key was pressed,
	  and in that case, it cleared the CTRL flag in the BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. variable at
	  0040:0017h and stored its contents in an internal variable,
	  before continuing with the previous (non-zero) INT 48h handler.
SeeAlso: INT 49"PCjr"