syac(7)                    DG/UX 4.30                     syac(7)



     NAME
          syac - AViiON family intelligent asynchronous controller

     DESCRIPTION
          A SYAC is an intelligent asynchronous terminal I/O
          controller that controls a number of terminal lines.  The
          controllers supported are as follows:

             Name         # Lines   Description

             VAC8         8         Asynchronous 8-port controller;
                                    supports modem control

             VAC16        16        Asynchronous 16-port
                                    controller; supports modem
                                    control

             VDC/8P       8         8-port cluster control box with
                                    printer port; supports modem
                                    control

             VDC/16       16        16-port cluster control box;
                                    supports modem control

             VDA/128      128       Terminal server host adapter

          The VDA/128 controller is a LAN controller supporting up to
          128 asynchronous lines using the VDC/8P and/or VDC/16 remote
          cluster controllers.

          Intelligent controllers are actually processors that perform
          I/O processing according to the tty modes in effect for each
          line.  It is necessary for the system administrator to load
          the SYAC-resident code image into SYAC memory before lines
          controlled by the SYAC can be used (see tcload(1M)).

          Terminals controlled by SYACs present the standard DG/UX
          terminal interfaces described in termio(7) and tty(7).  All
          model SYACs support all specified baud rates.

     FILES
          /dev/tty*           Terminal device files
          /usr/lib/syac/syactab

     SEE ALSO
          tcload(1M), termio(7), tty(7).









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