DigiWARE Release Notes   93000098N
				for
    DigiCHANNEL PC/X*, COM/Xi, MC/Xi, Xem, C/X Universal OS/2 Device Driver
			      XALL.SYS  V1.4.6

		Microsoft OS/2          1.0, 1.1, 1.2, 1.21, 1.3
		IBM OS/2                1.0, 1.1, 1.2, 1.3, 2.0, 2.1
		IBM OS/2 Ext. Edition   1.1, 1.2, 1.3, 2.0

		Diskettes               P/N's 40000593M (5) or 40000594M (3)
		Diskettes               P/N's 40000943  (5) or 40000908  (3)
		Software Manual         P/N 92000100C

				3/2/94


	Below are Enhancements and Bug fixes made to XALL.SYS V 1.4.5
	resulting in the new XALL driver V 1.4.6


	1) Enhancements

	   - Support has been added to the driver for the PC/8em and
	     PC/8emp modules.

	   - A command line switch, "/d:m" has been added to display
	     debug information during driver load.

	   - A command line switch, "/t:u" has been added to force the
	     computer type to MicroChannel. On some PS/2's, ABIOS calls
	     fail to identify the computer correctly and thus the driver
	     fails to initialize at boot time. Use of this switch eliminates
	     the problem.

	   - Adjusted flow control buffer levels for better performance.

	   - Added New Ioctl to block a thread until a modem or break event
	     occurs. See XALL.DOC

	   - Added a new user diagnostic program to the release diskette,
	     DGOS2UD.EXE. See DGUDREAD.ME

	2) Bug Fixes

	   - A new XXFEP.BIN file fixes DSR reporting problems on the PC/2e
	     and MC/2e boards.

	   - Fixed SETBREAKON (fct 4Bh) & SETBREAKOFF (fct 45h) IOCTL
	     functions to work across entire product line.

	   - Fixed TX IMMEDIATE (fct 44h) IOCTL function.


	   - Fixed COM STATUS (fct 64h) function which would return erroneous
	     values.

	   - Fixed QUERY COM EVENT (fct 72h) bug that reported ring events on
	     both rising and trailing edges. Events should be reported only
	     on the trailing edge.

	   - Failed to check OS/2 PHYS_2_VIRT kernel calls for failure
	     returns and could thus use invalid addresses.

	   - Fixed bug in DevOpen that incorrectly set the Transmit Low Water
	     Mark, causing DosWrites to return immediately instead of waiting
	     for a timeout period to transpire.

	   - Wait longer in Close to let the transmitter to drain. Flushing
	     buffers too soon caused loss of print data to occured.

	   - Fixed SETDCBINFO (fct 53h) bug which could cause DTR would go
	     high when RTS Flow was enabled.

	   - Fixed COM/Xi bug on port 8. The driver thought it's rx buffer
	     was 8k longer than it really was.

	   - Fixed COM/Xi bug on 4 port cards; buffers exceeded 16k and thus
	     prevented the driver from reading all received data.

	   - Set default timeouts to 1 Second instead of 1 Min. There is
	     an error in the OS/2 specs.


	3) Known Limitations

	  - Maximum 256 channels.
	  - The COM/Xi is limited to 9600 or at most 19200 baud.  All other
	    intelligent cards will support 38.4K baud on all channels, and
	    57K baud on a few channels.


	4) Manual Errata