The Accom WSD can act as a frame buffer because it can receive images digitally across the Ethernet. (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 across the Ethernet, 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 275.
Tip: If the Accom WSD video controller device is on an Ethernet and is being used simultaneously, the buffer statement in the video controller configuration entry must contain the exclusive keyword when referring to its Accom WSD frame buffer.
You can control the Accom WSD directly via an Ethernet. You can access the Accom WSD from any workstation that has Ethernet access to it or the workstation containing the Accom SCSI connection.
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.
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 your Accom WSD is on an Ethernet, the host is different than the device_name of the Accom WSD. It can be any of the workstations on your Ethernet network, but you must ensure that your application has been installed on the server workstation as well. If your application is accessing an Accom WSD from many workstations, you must ensure that each workstation's configuration file defines the same host (and not localhost) for that Accom WSD server process. The same host should be specified in both the video controller and the frame buffer configuration entries for a given Accom WSD.
name device_name
The device_name is either the hostname of the Accom WSD on the Ethernet network.
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.