INT 15 - Intel System Management Bus - DISCONNECT

	AX = 53B0h
	BH = 05h
	CX = 6941h ('iA')
Return: CF clear if successful
	    AH = 00h (SMBus OK)
	CF set if error
	    AH = error code (03h,04h,05h,0Ah,86h) (see #00484)
Note:	this function is supported in connected mode (far CALL entry point)
	  only
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=02h,AX=53B0h/BH=03h,AX=53B0h/BH=04h