optacon - An X program for the Optacon II
option instructs the optacon
utility to use the next argument as the file for the Optacon II device. By
default, the device is /dev/tty00.
the optacon utility to use the next argument as the interval for the Optacon
II device. The interval specifies how often (in milliseconds) the optacon
utility will update the display of the Optacon II. By default, the interval
is 10 milliseconds.
The Optacon II, a product of
TeleSensory Corporation, is an optical-to-tactile conversion device meant
to assist the blind in accessing visual information. The
utility was made specifically to allow blind users to use an Optacon
II to have more access to an X Window System display. The
utility does so by mapping the pixels surrounding the on-screen
pointer to the pins on the Optacon II. All black pixels will cause the associated
Optacon II pins to vibrate, and all other pixels will cause the associated
Optacon II pins to remain still.
The format for a resource specification for the optacon utility is:
Specifies the resource. Specifies the value that is to be assigned to the resource.
For details about modifying resources, see X(1 X).
Because each X Window System toolkit-based application can consist of a combination of widgets (for example, push buttons and a scroll bar), you can form the name string for a new resource specification by adding widget class and name identifiers to the string. For further information about adding class and name identifiers, see X(1 X).
The following sample shows the optacon resources and their default values:
*dev: /dev/tty00 *interval: 10
X Window System is a trademark of MIT.
The Optacon II is a product of TeleSensory Corporation, P.O. Box 7455 Mountain View, CA 94039-7455 800-227-8418 email@example.com
DECwindows User's Guide