Driver:	TWALL, Version 4.00.03 August 5, 1992
	Copyright (c) 1990-1993, Emeritus Technologies.
	All rights reserved.

	TapeWare Alliance DAT driver

	Date		Mod	Description
	-----------	---	-----------------------------------------------
	5-Dec-1990	RAC	Copied from TWDATDRV.C
	5-Feb-1991	MDB	First working version of driver
	June 3, 1991	MDB	Corrected error handling process
	July 13, 1991	MDB	Corrected error that returns ERROR_FILE_MARK
				when seeking to an appended segment during
				READ or VERIFY.

	July 13, 1991	MDB	removed polling routine from list
				when dSeekBlock is called.

	24-Sep-1991	RAC	Added support for 3.01 header files and
				Borland C++ compiler. Changed version number
				to 3.01.00.

	13-Jan-1992	MDB	Seperated read/write command required flags
				and updated them in dSendCommandWait()

	27-Jan-1992	MDB	Changed version number to 4.00

	27-Mar-1992	MDB	Set Action to ACTIVE prior to calling
				PerformIOPB(); This way, if we get an IRQ
				before PerformIOPB returns, Action will not
				be left active.

	5-Aug-1992	MDB	Added dispatch to delay timings.

