INT 13 - Enhanced Disk Drive Spec v3.0 - SEND PACKET COMMAND                    
	AX = 5001h
	DL = drive number
	ES:BX -> command packet (see #00284)
Return: CF clear if successful
	    AH = 00h
	CF set on error
	    AH = error code
Desc:	send data to and from a serial packet-oriented device, such as IEEE1394
	  and USBsee Universal Serial Bus
SeeAlso: AH=41h"INT 13 Extensions",AH=4Eh


Format of Enhanced Disk Drive Spec v3.0 command packet:
Offset	Size	Description	(Table 00284)
 00h	WORD	signature B055h
 02h	BYTE	length of packet in bytes
 03h	BYTE	reserved (0)
 04h  N BYTEs	formatted packet data