Keyboard Interface Pca Strapping Options For Point-To-Point - HP 2641A Reference Manual

Data Communications
Table 5-8. Keyboard Interface PCA Strapping Options for Point-to-Point (Continued)
OPERATION WITH
NORMAL OPERATION STRAPPING OPTION
STRAP STRAPPING OPTION (SWITCH CLOSED)
(SWITCH OPEN)
H Inhibit DC2
During' Block Mode Handshake trans- A DC1 from the computer is not
fers, the terminal sends a DC2 in
required to trigger data transfers to the
response to a DC1 prior to sending
computer. Also, the DC2 from the termi-
data. (See Block Transfer Handshake nal is not sent during Block Mode
strapping above.)
Transfer handshakes. (See Block
Transfer Handshake strapping above.)
Additionally, when the" key is pressec
in Block Mode the cursor will be placed
in the first column before transmission
occurs if operating in Line/Field Mode
(switch D closed) or Home'd if operating
in Page Mode (switch D open.) Open-
ing both switches G and H eliminate the
terminal's use of the Handshake proto-
col entirely.
J Auto Terminate No effect.
When in BLOCK mode and the ENTER
key is pressed, places a non-displaying
terminator before the cursor position.
K Clear Terminator
No effect. Clear terminator caused by Strapping
Option J or ESC _ .
L Self Test Inhibit No effect.
Self Test function is inhibited. Pressing
TEST key or issuing ESC z displays the
NO TEST message. TAPE TEST and
DATA COMM SELF TEST functions
are not affected.
M INSERT and DELETE No effect. Reverses effect of. key on INSERT
CHAR with wrap (Reverse CHAR and DELETE CHAR keys (Le.,
Sense) when key is pressed, line wrap around
is in effect without having to press
CNTL key. When either key is pressed
while pressing CNTL, normal insert
character and delete character func-
tions are in effect.)
N
Escape Code Transfer No effect. Escape codes relating to the display
to Printer. (e.g., display enhancements, alternate
character sets, format mode, fields,
etc.) are sent to printer if it is selected
as a destination device.
p,a
Refer to page 7-49 for APL applications.
R Circuit Assurance The transition from receive state to
The transition from receive state to
transmit state occurs after both CB
transmit state occurs after CB (106)
(106) (Clear to Send) and SB (122) (Clear to Send) goes on.
(Secondary Receive Data) go on within
2.6 seconds. Otherwise, the terminal
returns to the receive state.
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