Table of Contents
Advertisement
Data Communications
have NOT previously saved a data comm menu, then the
When you have set all the fields to the desired values, you
may then save them in non-volatile memory using the
"SAVE CONFIG" (D)
function key. Note that when you
do this, the particular data comm configuration takes ef-
fect immediately for whichever port is attached to it (the
port is reinitialized).
FULL DUPLEX HARDW I RED
menu (with its default values) (
resides in non-volatile memory by default.
_
While a data comm configuration menu is displayed on the
screen, the
g, g, _ ,
a , a n d " function keys
have the effects described in table 7-5.
At any given time, there is only one portI and one port2
configuration menu stored in non-volatile memory. If you
g
DEFAULT
VALUES
..
POWER ON
VALUES
-
N EXT
CONFIG
a
DISPLAY
FUNCTNS
..
Config
KeY9
Table 7-5. PortI and Port2 Configuration Function Keys
Pressing this key causes all fields in the menu on the screen to be filled with their default values.
Pressing this key causes all fields in the menu on the screen to be filled with the values that are
currently stored in non-volatile memory. If a data comm menu other than the one displayed on the
screen is saved in non-volatile memory, then pressing this key will cause the menu from non-
volatile memory to appear on the screen. Note that if you have not yet saved a data comm
configuration in non-volatile memory, pressing this key causes the
FULL DUPLEX HARDWI RED
menu
(with its default field values) to appear on the screen.
Pressing this key causes the next data comm configuration menu (with its default field values) to be
displayed on the screen.
Pressing this key alternately enables and disables display functions mode. When enabled, an
asterisk appears in the key label. You use display functions mode for entering ASCII control
characters in the
Xmi tSOD, RecvSOD, Xmi tEDD,
and
RecvEOD
fields. Note that this implementation of
display functions mode is separate from that which is enabled/disabled via the mode selection
keys. Enabling or disabling display functions mode using this function key does NOT alter the
effect of the
"DISPLAY FUNCTNS"
mode selection key (and vice versa) .
Pressing this key removes the menu from the screen (WITHOUT activating it or saving it in
non-volatile memory) and returns the function key labels to the following:
D
.. ..
port 1
config
g
port2
config
g
terminal
config
-
a
POINT-TO-POINT
PROGRAMMING INFORMATION
Character Mode
This topic discusses programming information of interest
to someone who is writing a data communications driver or
controller program to communicate with an HP 2624A
terminal in an asynchronous point-to-point environment.
An asynchronous point-to-point data communications
environment is characterized by a flow of characters that
have been produced over random time intervals. In order to
achieve hardware synchronization, each character is
delimited by a "start bit" and one or more "stop bits".
7-12
When the terminal is configured for character mode opera-
tion
(BL'(]CK MODE
disabled), the terminal sends char-
acters to the host computer as they are entered through the
keyboard. This mode of operation can be used for in-
teractive or conversational exchanges between the ter-
minal operator and an application program.
Multicharacter Transfers
When the terminal is configured for block mode operation
(BLOCK MODE
enabled), data entered through the keyboard is
(
(
Advertisement
Table of Contents
