Release Notes PN 93000312B

                               DGX.SYS
                            Version 2.2.8

            IBM OS/2 1.3, 2.00, 2.01, 2.1, 2.11, 3.0, 4.0
                       Diskette: PN 40000309R
                       Software: PN 80006697B

                           April 24, 2000


CONTENTS

1. INTRODUCTION
2. SUPPORTED PRODUCTS
3. ENHANCEMENTS
4. BUG FIXES
5. KNOWN LIMITATIONS
6. HISTORY


1. INTRODUCTION

   DGX.SYS is the OS/2 driver for Digi International's Classicboard
   family of serial I/O adapters.

2. SUPPORTED PRODUCTS
   Digi PC/X, MC/X and Modem/X and Classicboard (ISA and PCI)

3. ENHANCEMENTS
   No new enhancements in this release.

4. BUG FIXES
   -- Fixed a problem with the initialization of 4-port PCI Classicboard
      adapters.

5. KNOWN LIMITATIONS
   -- A maximum of 32 ports are available using DGX.SYS in OS/2 sessions.

   -- Though many channels can be active at 1200-4800 baud, only a few
      channels can sustain the baud rates of 9600 or more without data
      loss and serious system performance degradation.

   -- Though the driver supports both ISA and PCI adapters, it cannot
      run both types simultaneously.

6. HISTORY

   V2.2.7    March 21, 1999
   ENHANCEMENTS
   -- Added support for the PCI Classicboard.  With PCI adapters the
      port, IRQ and number of ports are read from the adapter's PCI
      configuration space and not from the config.sys "Device=" line.
      Thus whereas to load support for an 8 port ISA Classicboard one
      might specify:

           DEVICE =C:\DIGI\dgx.sys /P:140 /C:8 /I:5 /n:"digi"0

      for a PCI Classicboard one need specify only:

           DEVICE=C:\DIGI\dgx.sys /n:"digi"0

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   V2.2.6A2   July 30, 1998
   BUG FIXES
   -- Fixed a problem in the interrupt service routine where boards based
      on the new 16654 UARTs would sometimes hang the OS.

----------------------------------------------------------------------

   V2.2.6     November 4, 1997
   ENHANCEMENTS
   -- Ports can be anywhere in any order (address-wise).

   BUG FIXES
   -- Fixed bug that rendered chaining of interrupts unusable.
   -- Created workaround for OS/2 Print Spooler bug which would cause
      redirected Digi printer ports to be paused