ncsc(7)                        DG/UX 5.4R3.00                        ncsc(7)


NAME
       ncsc - link an AViiON bus to a SCSI bus

SYNOPSIS
       ncsc ([def]) or
       ncsc @device_code(adap_addr[,adap_id])

DESCRIPTION
       The ncsc adapter allows an AViiON server to access a Small Computer
       System Interface (SCSI) device. The adapter links a host's VME bus to
       a SCSI bus.  The adapter is available with either a single-ended or a
       differential SCSI bus interface.

       To set up this interface, or access a SCSI device via the interface,
       you use the ncsc adapter ID in a device driver statement: see st(7)
       and sd(7).

       The first format accepts all default values. The second format
       specifies all values:

        def         is a hexadecimal number (range 0-F), selecting a default
                    device code and VME address for the adapter. Null equals
                    0.

        device_code is the hexadecimal device code of the adapter preceded
                    by the @ character.

        adap_addr   is the adapter's hexidecimal VME address.

        adap_id     is the adapter's SCSI ID (range 0-7, recommended 6 or
                    7). Omit to accept the default ID 7.

       A ncsc adapter attempts to use the SCSI synchronous data transfer
       protocol, by negotiating a synchronous offset with each device on the
       the SCSI bus.  If this negotiation fails, the asynchronous mode is
       used.

EXAMPLES
       The following statement in a DG/UX configuration file configures a
       SCSI disk with default values, and creates short and long names for
       the disk in /dev/pdsk and /dev/rpdsk:

            sd(ncsc(0),*)

       The following statement configures a SCSI tape drive, specifying
       device code 30, VME host address FFFFC000, adapter SCSI ID 7, tape
       drive SCSI ID 4, and tape unit number 0:

            st(ncsc@30(FFFFC000,7),4,0)

       The statement creates short and long device names for the tape drive
       in /dev/rmt.

       Short device names (0, 1, 2, and so on) are created arbitrarily



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ncsc(7)                        DG/UX 5.4R3.00                        ncsc(7)


       depending on the sequence of configuration statements in the DG/UX
       system file.

SEE ALSO
       sd(7), st(7).




















































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