INT 21 - ATA Software Programming Interface (ATASPI) - INTERFACE

	AX = 4402h
	BX = file handle for device "$ATAMGR$"
	CX = 0004h (size of buffer in bytes)
	DS:DX -> buffer for result (see #90000), set to zeros before call
Return: CF clear if successful
	    AX = 0004h
	CF set on error
	    AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:	ATASPI is an API to control IDE, EIDE, and ATAPI devices, proposed by
	  Future Domain; there's at least one driver in existence which
	  conforms to this specification: ATASPI16.SYS by Future Domain
	(see #90002) on the stack and the caller must clean up the stack
	Future Domain ATASPI16.SYS v2.2 performs ATASPI calls using INT 4Fh
	  interface instead of this INT 21/4402h interface and itself supports
	  both interfaces
SeeAlso: AX=4402h"ASPI",INT 4F/AX=0081h,INT 4F/AX=0082h,PORT 01F0h-01F7h"HDC1"