INT 15 - CASSETTE - TURN ON TAPE DRIVE'S MOTOR (PCIBM PC and PCjr only)
	AH = 00h
Return: CF set on error
	    AH = 86h no cassette present
	CF clear if successful
SeeAlso: AH=01h"CASSETTE",MEM 0040h:0067h"PCIBM PC"