INT 13,19 - Park Fixed Disk Heads (AT & newer)

	AH = 19h
	DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive 1)


	on return:
	AH = status  (see INT 13,STATUS)
	CF = 0 if successful
	   = 1 if error


	- available only on AT, XT 283 and PS/2 machines