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BELL
The Gc character causes the terminal to "beep". A beep is
automatically generated at the end of each unprotected
field in format mode and as the cursor passes within eight
positions of the right margin.
SEND DISPLAY
The ESC d sequence causes the terminal to send a block of
display memory data to the computer. The data sent de-
pends on the Line/Page setting of Keyboard Interface
switch D and whether the terminal is in format mode or
not.
Data is transmitted beginning at the current cursor posi-
tion. If the terminal is strapped for page, data is transmit-
ted until the end of the current display. If strapped for
line, transmission stops at the end of the current line for
non format mode or at the end of the current field if in
format mode.
WAIT
The terminal can be made to pause for approximately 1
second by sending it an ESC
@.
Multiple commands can
be used to obtain any desired time period.
KEYBOARD DISABLE/ENABLE
The terminal keyboard can be locked by sending an ESC c.
It must then be unlocked by sending an ESC b or by
pressing the RESET TERMINAL key.
RESET TERMINAL
A programmatic "Soft Reset" can be made by sending an
ESC g to the terminal. A "Full Reset" can be made using
ESC E.
Soft Reset (ESC g). A soft reset results in the following:
1.
Any error messages present are cleared, the normal
display is returned and the keyboard is unlocked.
2.
If DISPLAY FUNCTIONS is enabled, it is turned off.
3.
Incomplete device selections are cleared. (Previous
selections are retained.)
4.
If the terminal is set for REMOTE, RECORD opera-
tions are ended.
5.
Device operations (tape or printer) are stopped. If a
tape drive was moving at the time the command was
received, the tape will be rewound. In addition, if the
tape drive was recording data, an end-of-data mark
will be recorded before the tape is rewound.
Terminal Control Functions
6.
Current transmission of data stops. Data waiting to
be sent to the computer is not sent. Partial messages
from the computer are lost. The data communications
facility is re-initialized.
7.
All keyboard lights are turned on for 0.5 seconds.
Full Reset (ESC E). A full reset has the same effect as
turning power on and consists of the following:
1.
The screen and memory are cleared, then TERMINAL
READY is displayed. Format mode, display functions,
and all programmable functions including the func-
tion keys (F1-F8) are turned off or set to their default
values.
2.
Device assignments are set to their default values,
tapes (if present) are rewound to their load point. (An
end-of-data mark is not written.)
NOTE
The CPU must wait 200 milliseconds
after issuing ESC E before sending addi-
tional data.
MONITOR MODE
Monitor Mode can be turned on by sending ESC y. Refer to
Section V for a discussion of Monitor Mode.
SELF-TEST
The Terminal Self-Test can be executed by sending an
ESC z. The Data Comm Self-Test can be executed by
sending an ESC x. Descriptions of the self-tests are given
in section VII.
MODEM DISCONNECT
The terminal can be directed to "hang up" the modem by
sending an ESC f. The terminal does this by lowering the
CD (Data Terminal Ready) line for 1 second if standard
data comm is used or 10 seconds if the terminal is confi-
gured for multipoint.
PROGRAM DOWN LOAD
The ESC & b and ESC & c sequences allow special diag-
nostic programs to be loaded into the terminal and exe-
cuted. The escape sequence must precede the program to
be loaded. This function can be used by HP diagnostics
only. The ESC & c functions the same as ESC & b except
that the LOADER message is not present on the display.
3-5
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