INT 2F - Kingswood TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. Windows - SOUND BEEPER
	AX = 3901h
	BL = 0Ah
	DX = sound divisor, or 0 for silence.
	     (divide 1843200 by required frequency to get value for DX)
	CL = sound length in 18.2 Hz clock ticks
Return: AX = error code (0000h if successful)
	SI,DI,DS,ES preserved
SeeAlso: AH=39h/BL=00h