INT 83 - JM Pro Tracker v5.0 - ???                                              
	AH = 16h
	AL = subfunction
	    00h ???
		Return: BX = ???
			CX = ???
			DX = ???
			ES:DI -> ???
			CF indicates ???
	    01h ???
		Return: BX = ???
			CX = ???
			DX = ???
Return: CF clear if successful
	CF set on error
	    AX = error code (FFxxh) (see #03976)