INT 21 U - xDISK v3.31 - CONFIGURE                                              
	AX = 4404h
	BL = drive number (00h = default, 01h = A:, etc)
	CX = 0047h (length of version string)
	DS:DX -> 79-byte buffer for version string and ???
	DS:0081h = commandline containing new switches for driver
Return: CF clear if successful
	    AX = number of bytes actually transferred
	CF set on error
	    AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: xDISK is a shareware resizeable EMSsee Expanded Memory Specification RAMdisk by FM(Frequency Modulation)	A method of encoding data as a series of magnetic flux reversals on disk or tape, commonly known as single-density recording.  In frequency modulation, a series of clock pulses are written at regular intervals, with one data bit for each clock pulse.  See also MFM, RLL. de Monasterio
SeeAlso: AX=4405h"xDISK",INT 2F/AH=DDh/BX=7844h"xDISK"
                                                                                

INT 21 - SFS v1.00 - GET CONFIGURATION INFORMATION                              
	AX = 4404h
	BL = drive number (00h = default, 01h = A:, etc)
	CX = 001Ah (length of data packet)
	DS:DX -> buffer for data packet (see #01536)
Return: CF clear if successful
	    AX = number of bytes actually transferred
	CF set on error
	    AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: SFS (Secure FileSystem) is a shareware encrypting disk driver by
	  Peter C. Gutmann
SeeAlso: AX=4405h"SFS"


Format of SFS data packet:
Offset	Size	Description	(Table 01536)
 00h  4 BYTEs	signature string "SFS1"
 04h	WORD	SFS unit number (0-based)
 06h	WORD	drive on which the SFS volume is mounted
 08h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	sector offset of logical volume from start of physical volume
		0 if logical volume = physical volume
 0Ch	WORD	flag: 00h = no disk mounted, 01h = disk mounted
 0Eh	WORD	flag: 00h read/write, 01h read-only
 10h	WORD	quick-unmount hotkey
		(high byte = shift state, low = scan code) (see #00006)
 12h	WORD	auto-unmount time in minutes, or 0000h if already expired, or
		FFFFh if not set
 14h	WORD	time in minutes remaining before auto-unmount
 16h	WORD	internal driver check code
		0000h no error
		0001h driver consistency check failed
		0002h unit consistency check failed
 18h	WORD	disk access mode
		0000h BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.
		0001h IDE(Integrated Drive Electronics) A type of disk drive interface which essentially extends the PCIBM PC's expansion bus all the way to the drive and places the drive controller on the disk drive itself.	 See also ESDI. direct access
		0002h SCSI(Small Computer Systems Interface) A system-independent expansion bus typically used to connect hard disks, tape drives, and CD-ROMs to a computer.	A host adapter connects the SCSI bus to the computer's own bus.  See also ESDI, IDE. direct access