INT 60 u - HP 95LX System Manager - TURN OFF SOUND                              
	DI = 0803h
	STACK:	2 WORDs unused dummies (for calls from high level languages)
Return: ???
	STACK unchanged
SeeAlso: INT 60/DI=0800h,INT 60/DI=0801h,INT 60/DI=0802h