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                        DigiWARE Release Notes 93000159G
                                      for
                             Digi PortServer I & II
                            SCO OpenServer Release 5
                        SCO UNIX System V, Release 3.2v4
                         Software Package P/N 75000159G
                      Diskette P/N 40001044G V2.0.2 (3.5")
                         PortServer I  Firmware: ps3410
                      PortServer II Firmware: psII300.bin
                         Software Manual P/N 92000159D
                                    03/17/97


          1. Enhancements

          Improve the input performance in raw mode.

          2. Bug Fixes

          Fix the  PortServer  reset  problem  which  all  ports  lose
          connections with the Realport driver.

          Fix a potential system  memory  leak  problem  when  running
          applications in a busy system.

          Fix a potential system panic  problem  which  is  caused  by
          accessing to unconfigured ports in EBI modules.

          The  following  problem  reports  will  be  closed  by  this
          release:
              4625 - Daemon dies
              4629 - Slow terminal, printer
              4680 - Lost connection to PortServer
              4767 - Ports resetting on remote PS II
              4821 - Enabled ports drop off to login
              4833 - System lockup
              4835 - Disconnects and other problems
              4858 - Slow performance in Word

          3. Known Limitations

          Because of timing issues in the release of this  driver,  it
          is  highly  recommended that you contact Digi's Tech Support
          to  determine  which  version  of  the  Firmware   is   most
          desirable.

          If a PortServer loses power it may be necessary to wait  for
          up  to 2 minutes before communication is re-established with
          that PortServer.  If a login is  not  seen  for  a  terminal
          after  that  time  it  may  be  necessary  to kill the getty
          associated with that port so init will respawn the process.

          Ditty "printer" is not supported.  If this functionality  is
          needed,  use  "sleep"  to  hold the port open, as in:  sleep
          999999 < /dev/ttya?? &

          4. Manual Errata

          During the installation you have the option  of  enabling  a
          tftp   boot  for  the  PortServer.   This  is  normally  not
          necessary, the assumption being that  new  PortServers  will
          ship with the newest firmware in EPROM.

          Set up the PortServer as:
              set port range=* dev=host.
          alternatively:
              set port range=* dev=mout (or dev=mio) is effective.

          For ports where a 3-wire cable is being used setting dev=prn
          is recommended.

          It may also be necessary to:
              set config realport=771.
              771 is the default TCP port number and it  is  also  the
              default during the driver installation.

          A configurable timing variable for each PortServer has  been
          added   to   the  /etc/conf/pack.d/nts/space.c  file.   When
          experiencing  heavy  network  traffic  cause  by  a   remote
          PortServer,  increasing  that  value from 100 to 1000 should
          help with some impact in the overall performance.  A  kernel
          rebuild is required fot the change to take effect.

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