Caps Only; Horizontal Tabulation; Character Parity Error Detection; Upper And Lower Case Switch - GE TermiNet 300 Programmer's Manual

GEK-15002 Programmer's Manual
CAPS ONLY
The CAPS ONLY switch is located on the rear
surface of the machine. When ON, keyboard opera-
tion sinlulates that of a Teletype M33 or M35; i. e. ,
no lower-case characters are produced by the key-
board. The position of this switch does not affect
received data.
OPTIONS
HORIZO,NTAL TABULATION
The optional tabulation feature is a single
printed-circuit card which mayor may not be used
without affecting any other operation.
Tab Setting - A tab is set at any print position
where the two codes ESC (Escape) - 1 (one) are
recognized. Any number of tabs can be set on a
print line.
Tab Clearing - Recognizing ESC 2 clears all tabs.
Operation:
When the CR code is recognized, the printer
moves to the tab set farthest left on the print line.
If no tabs are set, the printer goes to position one.
When the HT code is recognized, the printer
moves to the next tab set to the right. No delay is
required between data characters, HT, and new data
characters.
NOTE: lVhenpower has been removedfrom
jJrillleY,
all tabs will be dropped. This
do(',,",'
not apply if printer has gone to the
S'
l~lJ.Vl)BY
condition.
ANSWERBACK
The answerback option is a single printed-circuit
card
Ulat
can contain up to 20 characters of infor-
mation usually used for machine identification. The
method of coding the answerback is described in the
Service Manual.
The answerback is activated upon receiving the
ENQ (Enquiry) code or depressing the HERE IS
button.
Timing - The answerback begins transmitting
after receiving the Enquiry code.
LINE TURNAROUND
The Line Turnaround is a single printed-circuit
card. Following are the functions included.
16
BIE' .F.R.llln
a.,
1. Line Turnaround - Recognizes control codes
to change state of data set lead CA. The following
codes are acted upon for this function:
ACK
ETX
NAK
2. Wait Before Transmit - Control READY lamp
by DLE? - ENQ exchange.
3. Mandatory Disconnect - Forced disconnect on
recognizing DLE-EOT.
4. Recognize NAK as equivalent to "Break" or
"Interrupt" .
5. Terminal Status - Respond to ENQ with ACK
or NAK to show Terminal status. If answerback is
included, ACK or NAK will be last character, added
to answerback.
CHARACTER PARITY ERROR DETECTION
This option is a single printed-circuit board and
operates as follows:
If a data character is recognized with incorrect
character parity (add), the following action takes
place:
1. A "Break" is transmitted.
2. Alarm sounds.
3. INTERRUPT light is energized and stays on.
4. If tape reader is running, it stops.
5. The unit goes to the "Standby" condition, and
the INTERRUPT light turns off only when depressed.
The keyboard is disabled while INTERRUPT is lit.
This parity error option may be strapped to light
only the INTERRUPT light.
UPPER AND LOWER CASE SWITCH
The UPPER AND LOWER CASE switch is ac-
cessible from the rear of the printer. It affects key-
board operation only. When OFF, keyboard opera-
tion is normal. When ON, unshifted alphabetic keys
are generated as shifted (upper case). The purpose
of this switch is to make the TermiNet 300 Printer
keyboard similar to Teletype M33 and M35 key-
boards. Looking at the USASCII code chart, the
effect of this switch is to move Column 6 to 4 and
Column 7 to 5 except for Delete which is unchanged.