Accom WSD for SCSI

The Accom WSD can act as a frame buffer because it can receive images digitally across via a SCSI connection. (If the Accom WSD is receiving a digital video signal through the D1 port, the frame buffer section of the Accom WSD is effectively being bypassed.) In order to use the Accom WSD completely via a SCSI connection, without sending a D1 video signal to it, two Accom WSD configuration entries must be defined: one for the video controller functionality and one for the frame buffer functionality. For more information on the Accom WSD video controller, see page 277.

If you have multiple Accom WSDs, you may want to create a configuration entry for each one. Be careful to ensure that the video controller configuration entries refer to the corresponding frame buffer configuration entries for the same physical device.

Syntax

The syntax is:

device frame buffer name
          server_name server
          server_id socket
          server_host host
          defn
                    name device_name
                    format format
          enddefn
enddevice
device frame buffer name

The name is used by the Accom WSD video controller configuration entry to refer to this device. This name can be the same as the name of the corresponding video controller device.

server_name server

The server is the name of the executable that controls the Accom WSD. It resides in the product_bin. The server should be fbdaccom for the Accom WSD. (If you relocate the server executable, or if the server is running on a different host than your application, you must specify the server as a full UNIX pathname.)

server_id socket

The socket is the socket number through which your application communicates with the Accom WSD server process. This number must be unique to your UNIX system for each defined device and (Alias|Wavefront and non-Alias|Wavefront) server process. If you are defining multiple Accom WSD configurations, you must use a different socket number for each Accom WSD. The socket numbers must be different for the video controller and frame buffer configuration entries for the same Accom WSD.

server_host host

The host is the name of the workstation on which the server executes.

If you access your Accom WSD via a SCSI port, host can be the workstation that executes your application. If you are using one workstation for your application and another for the Accom WSD device, you must install your application on both machines. The host can be localhost if the Accom WSD device is connected to your workstation.

Device-specific statements

name device_name

The device_name is the filename used to specify the SCSI device. The format of the SCSI filename is: /dev/rdsk/dksSCSI_busdSCSI_addrvol

SCSI_bus can be:

0 for SCSI Bus 0 (for Indy's and Indigo's)

1 for SCSI Bus 1 (for Indigo²'s and Impact's)

SCSI_addr is the SCSI address of your device. The possible values are 0-7.

For example, /dev/rdsk/dks0d6vol is the SCSI filename for a device with SCSI bus 0 and SCSI addr 6.

Check the SCSI configuration menu on the Accom WSD status monitor to determine the SCSI address of your device. Consult the WSD Installation and Operations manual for details about the SCSI installation.

format format

The format indicates whether your Accom WSD recognizes NTSC or PAL-sized images. If this line is omitted, NTSC is used by default.

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