npsc(7)                        DG/UX R4.11MU05                       npsc(7)


NAME
       npsc - NCR PCI SCSI-2 Host Bus Adapter

SYNOPSIS
       npsc(parent-bus[,pci-device-num[,pci-function-num[,adapter-scsi-
       id]]])

DESCRIPTION
       The npsc adapter driver allows an AViiON system to access Small
       Computer System Interface (SCSI) devices using an NCR PCI-to-SCSI
       host bus adapter.  The adapter links the host's PCI System bus to a
       SCSI bus.  This adapter driver supports NCR PCI cards including the
       NCR-8251S and the NCR-8251D.  It also supports on-board NCR-53C825
       SCSI interface chips from NCR.  All of the hardware supports SCSI-2
       features.

       To configure such devices, you must add to the DG/UX system
       configuration file one or more device name entries of the form
       described in the synopsis above.  The parameters in a device name
       have the following meanings:

       ·   The parent-bus parameter is itself a device name, representing
           the PCI bus device to which the controller is attached (pci(0),
           for example).  There is no default value for this parameter; it
           must always be specified explicitly.

       ·   The pci-device-num parameter is a hexadecimal number in the range
           0 through 1F; it represents the PCI device number ("slot number")
           used by the device.  The default value for pci-device-num is 0.

       ·   The pci-function-num parameter is a hexadecimal number in the
           range 0 through 7 that represents the PCI function number used by
           the controller within pci-device-num.  The default value for pci-
           device-num is 0; non-zero values will be used only if the
           controller lies on a multi-function card.

       ·   The adapter-scsi-id parameter is used to indicate the SCSI ID of
           the NCR SCSI adapter.  The default value is 7.

FILES
       There are no files created specifically for the npsc device.  The
       device drivers for the devices on the SCSI bus create device nodes
       that include the npsc device name as the parent-bus for that device.
       See the scsi_bus(7) man page for a list of the supported child SCSI
       devices.

EXAMPLES
       The following entry in a DG/UX configuration file configures all SCSI
       disk units on all SCSI IDs for the npsc card in the PCI slot that
       uses PCI device number 5 on the primary PC PCI host bridge:

            sd(npsc(pci(0),5),[0-F])


       The following entry is identical to the example above, except that
       the SCSI adapter ID is 6 instead of 7:

            sd(npsc(pci(0),5,0,6),[0-F])


       For more information about DG/UX device configuration, refer to
       "Writing a Device Driver" in Programming in the DG/UX Kernel
       Environment.

SEE ALSO
       pci_bus(7), scsi_bus(7).


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