Lear Siegler ADM 3A - 3.5 Interface Control Operations

, __ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
followed by [~. The message will be
displayed. To exit without destroying the message
depress I SHIFT I and I SETUP I.
To display the entire message and then destroy it,
hold down SHIFT ke and press I SETUP\ key
followed by CTRL A . The message will be
displayed. Type any new character and it will
destroy the old message and replace it with the
new characters or enter a I CTRLI~ to destroy
the message completely.
To
exit the answerback programming mode, hold
down the I SHIFT I key and press I RETURNI key,
or type a thirty-third character on line 24.
3.3.7 Program Mode
The program mode allows the terminal to display
all 128 ASCII characters without causing any
action to be performed. All control codes are
displayed as printable characters in reverse video.
This allows you to embed useful information in
printed output and can be useful as a diagnostic
aid. Program mode is selected in set-up. The screen
shall be cleared when program mode is toggled.
Wrap and scroll shall be enabled when program
mode is enabled.
3.3.8 Cancel Current Mode
To cancel current set-up mode function and return
to first entry of the set-up mode, "HDX FDX,"
simultaneously press I SHIFTI RETURN I while
in set-up mode.
3.3.9 Restore Active Set-Up
To restore the function values current in non-
volatile memory press I CTRL IR I while in set-up
mode.
There will be no visual display message
indicating this function is being performed.
3.3" 10 Default Active Set-Up
To default active set-up, press 1 CTRL[Q] while in
set-up mode. There will be no visual display
message indicating this function is being
performed.
3.3,,11 Reset The ADM 3A
Resetting the AI)M 3A is accomplished by setting
the power ON /OFF switch to the OFF position;
waitiing
at least 10 seconds; then turning the
switch to ON. All display and other volatile
3-11
memory is erased when powering down or by
pressing I SHIFT I CLEARI·
3.4 GRAPHICS
The graphics capability of the ADM 3A allows
you to draw business forms and simple graphics.
To set graphics mode, press I ESC [QID . Graphics
mode will be set for the remainder of the field in
which the cursor is positioned (foreground or
background). However, graphics characters
should be reserved for use in background fields.
The appendix illustrates the limited graphics
character set. Escape sequences for the graphics
mode are in the appendix, page A-5.
3.5 INTERFACE CONTROL
OPERATIONS
3.5.1 Data Communication Ports
Communication between the ADM 3A and the
host computer or modem is accomplished using
the modem port. Transmission may be in one
direction at a time (half-duplex operation) or in
both directions simultaneously (full-duplex
operation).
3.5.2 Request To Send Operation
The ADM 3A may receive data at any time o\'er
the RXD line. Data transmission is controlled by
the clear to send (CTS) line.
Request to send (RTS) is set high to inform the
host that the ADM 3A wishes to transmit. If CTS
(clear to send) is low, transmission is inhibited.
RTS may be controlled in one of three ways, as
follows:
1. EIA mode is set to local; RTS rises before'
transmission of each character and falls
when character has been transmitted.
2. EIA mode is set to 103; RTS remains higb all
the time.
3. EIA mode is set to 202; RTS is controll('d
through the ADM 3A interface in the codt'
turnaround operation. Transmission may be
in only one direction at a time (half-duplex 1.
3.5.3 Code Turnaround Operation
Code turnaround operation is enabled by setting
the personality nlOde "turnaround" parameter to