SCS PTC-IIex, Руководство пользователя

Страница: 93 / 220

6 Commands
character to the TX/information window and Ctrl-B as a changeover character for
RX/delayed echo window. The windows should be scrollable independently.
Terminal mode 3 arranges the delayed echo to be signaled by a Ctrl-C, not a Ctrl-B as it
is in terminal mode 2. The normal RX text is still signaled by a Ctrl-B. This convention
makes it possible to divide the screen into three parts. The first window (Ctrl-A) for
system information and TX text, the second window (Ctrl-B) for RX text and the third
window (Ctrl-C) for delayed echo text.
Terminal mode 4 differs from TERM 3 in that the PTC sends a Ctrl-D before every
command prompt. TERM 4 considerably eases the terminal programming, in that the
continuous search for prompts (
cmd:
,
**--A--**
,
etc) is no longer required. Also, the
PTC always sends a pseudo prompt when the command interpreter is closed again (on
Connect, on switching to the CW or RTTY modes, etc). This contains only a < Ctrl D>,
followed by a <CR>, thus complete control over the (command) input window is
maintained, and there is no ambiguity concerning the <CR> sent from the PTC. It is
recommended that the <CR> from the keyboard, signaling the end of a command, is not
shown as local echo in the input window, but just ignored. This minimizes unnecessary
empty lines in the input window.
In terminal mode 5 , PR data, link status messages, monitor information etc is always
proceeded with a Ctrl-F. Only direct answer messages for a command input do not fall
under this convention. This allows the comfortable administration of PR multi connects
etc. using a non hostmode terminal.All PR received data is sent
at once to the terminal
program without bothering about the
Setch
command (refer to chapter 9.6.32 , page
128 ).
Setch
only has influence on the present transmit channel in terminal mode. This
means that one must set
Setch
to 2 if one wishes to transmit data via channel 2. (If for
instance an external link from the PTC-IIex has been automatically given channel 2 and
one wanted to write a text to that other station.) Terminal programs that fully support
Term 5 must therefore also automatically administrate the
Setch
command.
After Ctrl-F, follows the channel number (binary, increased by 48) and then the codebyte,
as is defined in WA8DED hostmode:
Code Byte Meaning
0 Success, no text follows (Not used in Term 5)
1 Success, text follows (Not used in Term 5)
2 Error, text follows (Not used in Term 5)
3 Link status info follows (CONNECTED to... etc).
4 Monitor header follows / no monitor data
5 Monitor header follows / monitor data available
6 Data from the monitor follows
7 Data from the link follows
Table 6.5: Code byte description
The terminal mode 5 also extends the command prompt. Every command prompt, as in
terminal mode 4 is proceeded with a Ctrl-D. after every Ctrl-D however, follows a byte
with prompt information.
79