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Terminal Control
A Remote/Local mode designator is maintained in non-volatile memory. When you change
modes using the
REMOTE MODE
key, you also alter that mode designator in non-volatile
memory. When you change modes using the escape sequences, however, the designator is not
altered.
After a hard reset or turning off the power, the terminal reverts to the mode specified by the
remote/local designator in non-volatile memory.
Character/Block Modes
When the terminal is connected on-line to a remote host computer, it operates in either of the
following data transmission modes:
• Character Mode. In this mode, data is transmitted a character at a time as it is entered
through the keyboard. ASCII control codes (such as
<CR>
and
<LF»
are transmitted.
• Block Mode. In this mode, data is not transmitted at the time it is entered through the
keyboard. Instead, you transmit an entire block of data by first typing the data (after
initially typing the data you can move the cursor around and edit the data as desired) and
then pressing the. key.
When the terminal is in Block mode, ASCII control codes (such as
<CR>
and
<LF »
are acted
upon locally but are not usually transmitted with the data block (refer to Section 9 for
detailed information on Block mode data transfers).
From the keyboard, you enable and disable Block mode using the
BLOCK MODE
key.
From a program executing in a host computer, you enable and disable Block mode using the
following escape sequences:
ENABLE:
Ec &k1B
DISABLE:
Ec &kOB
A Character/Block mode designator is maintained in non-volatile memory. When you change
modes using the
BLOCK MODE
key, you also alter that mode designator in non-volatile memory.
When you change modes using the escape sequences, however, the designator is not altered.
After a hard reset or turning off the power, the terminal reverts to the mode specified by the
Character/block designator in non-volatile memory.
The relationship between Block, Line, Page, and Format modes is described under. key
later in this section.
2-2
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