Software terminal emulation under the X Window System
The graphical user interfaces of most
Unix operating environments are built on the
foundation of the X Window System, an open technology developed by a
consortium of vendors and educational institutions and now administered by
the X.Org section of the X/Open Group.
The basic xterm application of the
X Window System does a decent emulation of a
DEC VT102, and most variants can also emulate the
Tektronix 4014 for vector-graphics display.
As with most
Unix things, basic documentation on xterm may be
viewed by typing "man xterm" at the shell prompt
has enhanced the original concept with
an xterm version
that supports ANSI/ISO color (including background-color erase)
and most functions of the DEC VT220 terminal except for a handful
(DECSTR, the KAM and SRM modes, the ones pertaining the doublesize
and soft characters, and, of course, blink).
With the usual distributed xterm code, if you want
such amenities as
scrollbars for the window, you'll have to add
into your ~/.Xdefaults file. Also, I've found that some
users are unaware of the menu for selecting the screen font, which
you can invoke by holding down the Control key and depressing the
right mouse button (with the mouse cursor in the xterm window).
Even if you using some other X-Windows-based terminal emulator, such as
rxvt or Eterm, to enjoy the fullest set of features
(such as color text), you may need to get and install Eric Raymond's
global master terminfo database.
Beam Ltd. (XVIL X server software for visually impaired, etc.)
selling the eXodus X server with
Tektronix and ReGIS graphics.
(This vendor, formerly the Connectivity division of
White Pine, also sells
WebTerm-X: a product for using X applications from a
Web Browser, and
Tunnel-Mate, for secure X sessions across the Internet.)
The miscellaneous information page covers many issues somehow related
to information display, including character sets, fonts, codes, HTML,
XML, Postscript, printing, data representation, and image conversion.