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Wildcat Gold - The Optical BBS
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Wildcat Gold - The Optical BBS (The Golden ROM Series)(Volume 4 Number 1)(The Digital Publishing Company)(1992).ISO
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TERMINAL
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1991-03-05
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A video display terminal is basically a dumb computer which is linked up to
another computer (over a cable or modem link) and displays what that computer
sends to it. A mainframe or minicomputer has a large amount of processing
power and can drive a number of terminals at the same time.
There are many different terminal types. Each one follows its own codes for
controlling how information is displayed on the screen. For example, there are
sequences that clear the screen, move the cursor, scroll the display, and so
on. Most terminals also have special keys which send special sequences back to
the main computer.
Telix can imitate several terminals. While in terminal mode, you may change
the terminal type Telix is currently emulating (imitating) by pressing Alt-T.
The default terminal can also be set in the 'Terminal settings' page of the
Configuration Menu. Following are the choices Telix offers:
TTY: A TTY (Teletype) terminal is very stupid. It basically displays all
the values it receives, except for about 5 or 6 Control codes (such
as Carriage Return), which move the cursor and ring the bell. Telix
does not have any special key definitions for this terminal type.
ANSI-BBS: This is a subset of the real ANSI terminal type defined by the
American National Standards Institute. Many BBS programs, when told
to do so, can send sequences supported by this terminal to make
screen display more interesting and colorful.
The ANSI.KEY file contains definitions for the arrow keys, and is
automatically read when this terminal is selected. These definitions
are supported by some full screen editors, for example.
VT102: The DEC VT102 terminal is one of the most popular (and most emulat-
ed) terminals in existence. It was developed by Digital Equipment
Corporation. The VT102 terminal has a large number of functions.
Telix supports all of these except for 132 column mode and double
height mode. As well, Telix only emulates double width mode, by
adding a space after every character.
Telix fully supports both normal and application cursor mode in VT
emulation. The VT102 keyboard layout used by Telix is stored in the
VT102.KEY file, which is automatically read by Telix when VT102
terminal emulation is selected. Once Telix has loaded this into
memory, the definitions can be edited through the use of the Alt-K
(Keyboard/macros) function. The default layout is one used by many
comm programs, in which the normal function keys (F1-F10) represent
the left side of the VT's numeric keypad, while the shifted function
keys (Shift-F1 - Shift-F10) represent the right side, as follows:
Telix function Keys DEC VT102 Keypad
F1 - F10 SF1 - SF10
┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐
│PF1 │ │PF2 │ │PF3 │ │PF4 │ │PF1 │ │PF2 │ │PF3 │ │PF4 │
└────┘ └────┘ └────┘ └────┘ └────┘ └────┘ └────┘ └────┘
┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐
│ 7 │ │ 8 │ │ 9 │ │ - │ │ 7 │ │ 8 │ │ 9 │ │ - │
└────┘ └────┘ └────┘ └────┘ └────┘ └────┘ └────┘ └────┘
┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐
│ 4 │ │ 5 │ │ 6 │ │ , │ │ 4 │ │ 5 │ │ 6 │ │ , │
└────┘ └────┘ └────┘ └────┘ └────┘ └────┘ └────┘ └────┘
┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐ ┌────┐
│ 1 │ │ 2 │ │ 3 │ │ E │ │ 1 │ │ 2 │ │ 3 │ │ E │
└────┘ └────┘ └────┘ │ │ └────┘ └────┘ └────┘ │ N │
┌───────────┐ ┌────┐ │ T │ ┌───────────┐ ┌────┐ │ T │
│ 0 │ │ . │ │ R │ │ 0 │ │ . │ │ R │
└───────────┘ └────┘ └────┘ └───────────┘ └────┘ └────┘
The arrow keys are also defined to send the proper sequences.
VT102: There is also an alternate VT102 keyboard layout available, which
cont'd may be more suitable to some users, and is much more useful on newer
(101) enhanced keyboard. It is in the file, VT102ALT.KEY. Instead of
using all the function keys to send out the codes generated by the
VT's numeric keypad, this keypad will send the proper codes from the
PC's numeric keypad when the Num-Lock key is depressed (F1 to F4
represent the VT's PF1 to PF4). This layout is especially handy for
users with the enhanced 101 key keyboard with the separate cursor
key and numeric keypads, and functions keys across the top. To make
use of the alternate layout, while at the DOS prompt type:
ren VT102.KEY VT102OLD.KEY
ren VT102ALT.KEY VT102.KEY
VT52: The DEC VT52 is another relatively common terminal type, that is
considerably simple than the VT102. Telix's key definitions for the
VT52 are stored in the VT52.KEY file.