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From bargi@dots.physics.orst.edu Thu Aug 31 23:42 MET 1995
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From: Hadi Bargi Rangin <bargi@dots.physics.orst.edu>
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Message-Id: <199508312141.OAA15627@dots.physics.orst.edu>
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Subject: README.DOTSCREEN
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To: screen@uni-erlangen.de
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Date: Thu, 31 Aug 1995 14:41:47 -0700 (PDT)
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Cc: bargi@dots.physics.orst.edu (Hadi Bargi Rangin)
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X-Mailer: ELM [version 2.4 PL24]
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Content-Transfer-Encoding: 7bit
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Content-Type: text/plain; charset=US-ASCII
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leider war readme file fuer dotscreen nicht in unserem dotscreen-Packet,
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deshalb schicke ich es Euch nachtraeglich. Nachdem Ihr unseren packet
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getestet habt, koennen wir Euch anrufen und vielleicht mehr ueber die
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Einzelnheiten sprechen, ob wir unsere Weiterentwicklung koordinieren
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===============================================================================
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Quick introduction to dotscreen
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-------------------------------
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2. Is dotscreen different as screen?
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3. Installation instructions
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4. Functions description
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5. Further development
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Dotscreen, is a system which allow a person direct access to unix via
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a braille display. The emphasis is on direct, because the braille
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display is connected directly to the serial port on the unix
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machine. You no longer must use a dos machine running a terminal
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emulation logged into a unix machine. Dotscreen is built on top of
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screen, a powerful full-screen window manager for unix tty terminals.
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Screen keeps track of what is being displayed in each window that it
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is managing so that it can easily switch back and forth between these
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windows. Dotscreen makes this stored window information available via
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a braille display. Dotscreen only allows access to tty terminal
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sessions, it does not allow access to X-Windows, however, it will run
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in an xterm window. Currently, it works with the TSI Navigator 40 and
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the TSI PowerBraille 40 braille displays. We plan to support other
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displays as demand and information about other displays is made
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2. Is dotscreen different than screen?
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======================================
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All of screens functions still work in dotscreen. A few of the
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functions are not accessible via braille, but we expect to remedy that
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3. Installation instructions
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============================
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Please read the INSTALL file for full installation instructions.
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In addition to those instructions, note that you must create
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a .screenrc file and that file must contain the type of braille
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display that you are using and the serial device that the display
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is connected to. A minimal .screenrc file should contain something
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like the following four lines, (these are only examples, please
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customize them for your configuration)
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# example of .screenrc when using braille display
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bd_type powerbraille_40
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bd_braille_table /home/gardner/us-braille.tbl
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4. Functions description
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========================
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The basic operation of screen is described in README. The braille
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navigation commands are similar to commands usually found on dos
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braille screenreaders. Also, because dotscreen is built on top of
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screen, the user can switch back and forth easily between many running
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applications. The braille commands can be changed any time after
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starting screen using the internal screen "C-a :" command line. All
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braille commands begin with "bd_"; following is the list of braille
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bd_start_braille on/off # Starts/stops using braille features on screen
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bd_link on/off # links/unlinks braille cursor to/from screen cursor
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bd_bell on/off # turn on/off sending bell-signal to terminal
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bd_scroll on/off # enables/disables scrolling
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bd_skip on/off # skip/don't skip balnk lines
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bd_width <integer-value> # number of braille cells that user want to use,
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# this value is always <= total number of cells
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bd_ncrc <interger-value> # number of cells displayed on the right side
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# of physical cursor (default = 1)
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bd_info <integer-value> # displays braille/screen cursor position
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# depending on its value, (no info: 0, only
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# bc-info: 1, only sc-info: 2, bc- and sc-info: 3
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bd_port <serial-device> # serial port which braille display is connected to
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bd_braille_table <bl-table> # braille table to be used. German, US and GS
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# braille tables are provided
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bd_type <braille-display-type>
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# braille display type being used
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Note: currently valid value for some parameters:
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1. gr-braille.tbl German braille code
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2. us-braille.tbl US computer braille code
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3. gs-braille.tbl GS braille code
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Since the braille tables are in files, you should give the full
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pathnames of the files either in .screenrc or using the
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internal screen "C-a :" command line.
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5. Further development
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======================
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As mentioned above, currently Dotscreen works with Telesensory braille
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displays the PowerBraille and the Navigator because Telesensory has
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given us the information needed to program their braille display. We
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plan to add support for other braille displays when and if we get the
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requisite information from the braille display manufacturer.
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Also some things such as cursor navigation from the braille display
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have not been implemented. If you find a feature missing that
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you wish to have, please contact us.
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This software has been developed within the Science Access Project at
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Oregon State University under the direction of John Gardner.
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Authors: Hadi Bargi Rangin (bargi@dots.physics.orst.edu)
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Bill Barry (barryb@dots.physics.orst.edu)
added
removed
doc/README.DOTSCREEN
