Release Notes P/N 93000401A

                    Digi Neo Device Driver Package
                            Version 1.0.0a
                                 for
                SCO OpenServer 5.0.4, 5.0.4, and 5.0.6

                    Software Package P/N 40002204A

                          September 14, 2001


Introduction

   This software package includes the device driver for the Digi Neo adapter.
   The package also contains Digi Port Authority (DPA) and ditty.


Supported Products

   Digi Neo 4
   Digi Neo 8


Enhancements

   Initial release.


Bug Fixes

   Initial release.


Known Limitations

   When using the Digi ports with getty for terminals and modems
   for login, there is a problem where when you first get the "login:"
   prompt until 1 second later, anything you type will NOT be accepted.
   This appears to be a problem with SCO's TTY layer, as this problem
   also occurs with SCO's native serial ports.

   There is a limit of 64 total ports for this driver. This can be
   any combination of 4 or 8 port boards. For example, the driver
   would be able to support 4 8 port boards, and 8 4 port boards for
   a total of 64 total ports.


Implementation Notes

   This package will link into the kernel even if there is no supported
   board installed in the system.  When the system boots up, the driver
   searches for supported adapters.  The driver will scan for any 8 port
   boards first, then it will scan for any 4 port boards next.
   The first board of each port count detected will get his devices 
   assigned first.  If there are multiple boards of a particular
   type installed in the system, the lowest slot number is configured
   first.  Therefore, board ordering is important to how the adapters
   are configured.  As an example:  If you have 2 Digi Neo 8 adapters
   and a Digi Neo 4, when the system boots up, the 2 8 port Neo boards
   will get assigned the first set of device nodes, based on lowest 
   slot number first, then the Digi Neo 4 will be assign its device
   nodes last.

   A message will print to the system console at boot time if
   there have been any boards added or removed from the system that
   this driver package knows about.

   Because of namespace conflicts with other Digi drivers,
   the dpa command is linked into /usr/bin with the name dpa.dgneo
   This version of dpa will NOT work correctly with other Digi
   products from other Digi drivers.

   The driver has been optimized to reduce the amount of cpu usage
   that it uses.  This optimization results in some minor latency delays
   in receiving and transmitting data. (About ~10ms or less).
   If the application demands data be delivered with as little latency
   as possible, the ditty command can be used to allow this.
   Use "ditty edelay 0 ttynxx" to ensure the lowest latency as possible.
   Set edelay to any non-0 value to reset back to the reduced cpu usage
   optimization.