system(4)                  DG/UX 4.30                   system(4)



     NAME
          system - format of DGC AViiON computer system description
          file

     DESCRIPTION
          The system file contains information about the hardware and
          system-dependent parameters found on your system.  This
          information is used in conjunction with one or more master
          files as input into the config(1m) program.  The config(1m)
          program is used to configure the system.  A more complete
          description of the system file is found in Installing and
          Managing the DG/UX System

          Each entry of the system file describes a particular device
          or parmeter.  The entry is a single line containing one or
          more fields.  Fields must be separated by one or more space
          and/or tab characters.

          The first field of the line determines the type of
          information specified.  Any line with a number sign (#) in
          column 1 is treated as a comment and is ignored.  Blank
          lines are also ignored.

          The system file is divided into two sections.  The order of
          sections and of lines within a section is arbitrary.

        Device Selection Section
          Entries in this section indicate which devices are to be
          configured in the conf.c tables.  Any device given here must
          also appear in a master file.

          The device selection entries can contain up to two fields as
          follows:

               devname   devcode

          Devname is the device name as given in a master file.
          Devcode is the DG device code (octal) for this device.  If
          there are two contollers of the same device type, your
          system should have two entries with the same device name but
          different device codes.  If you do not specify a devcode, a
          default device code supplied by the device driver will be
          used.

          In some cases you may find a third field following the
          devcode field.  This field shows the number of units
          (decimal) present on the controller.  The field is left in
          only as a comment and is not used during configuration.  The
          device driver determines the actual number of units at run-
          time.

        Tunable Parameters Section



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     system(4)                  DG/UX 4.30                   system(4)



          Entries in this section are used to change the value of
          constants that the kernel uses for setting table sizes and
          performing other configuration operations.  The format is:

               parameter value

          The parameter must appear in a master file and overrides the
          default value given there.  Value can be ommitted if an
          implied value is specified in the master file.  The implied
          value may be different from the default value.

     SEE ALSO
          master(4).
          config(1m), sysdef(1m) in the System Manager's Reference to
          the DG/UX System
          Installing and Managing the DG/UX System







































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