(Carner Detect Indtcatorl
Figure 3-18. Codes Generated with no Mode Keys Activated (Full-ASCII Keyboard)
SltAC E
NOTE: The SHIFT key overrides the UPPER CASE switch
-~
LOW
r n
SPEEDL-'-'
HAlF,-..,..., ON
CD
DUP L..L...J LINE
•
Figure 3-19. Codes Generated with the SHIFT Key Pressed and Held (Full-ASCII Keyboard)
DDDDDDDDDDLJDD§8 ElEJEJLJEJEJLJEJLJLJLJCJDDEJIl
IILJEJLlEJLJLJLJLJLJDD~§§
EJElLJEJLJLJLJ[J[j[J
SPEEDL.L.J LOWr n
rn
SPAC E HALF r"T"'"l ONCD
DUP L...L...J LINE
AOOO1195
•
NOTE :
D
A blank key indicates that a NU L code is transmitted.The CTRL (Control) key ov..ndes the SHIFT key and UPPER CASE Switch.
Fiwure 3-20. Codes Generated with the CTRL Key Pressed and Held (Full-ASCII Kevboard)
NOTE
When the UPPER CASE rocker switch is activated, only uppercase al phabet char-acters are generated/printed.
3.6.3 OPTIONAL RECEIVE-ONLY CONTROL PAN-EL. The Models 743 and 745 Receive-Only Data Terminals are equipped with a control panel in place of a keyboard. The control panel shown in Figure 3-21 has PAPER ADVance and LOW SPEED controls and a carrier detect indicator, all of which function the same as on the keyboard models. Limited-ASCII and full-ASCII versions are available, as well as Answer-Back Memory (ABM). A programmable ROM is used to implement the ABM.
3.6.4 OPTIONAL APL/ASCII KEYBOARD. The optional APL/ ASCII keyboard is equipped with 59 single action keys, four two-position rocker switches,
A0001272
and one carrier detect indicator lamp. Table 3-1 shows the code structure of the ASCII and APL codes as interpretd by the keyboard.
The APL rocker switch on the left front corner of the keyboard permits selection of either the ASCII mode or the APL mode. APL/ASCII keyboard layout and symbolization are shown in Figure 3-22. With the APL rocker switch depressed to the left (APL position), the terminal operates in the APL mode.
The output status in the APL mode is shown in Figure 3-23 with no mode key depressed and Figure 3-24 with the SHI FT key depressed.
With the APL rocker switch depressed to the right, the term inal operates in the ASC II mode. The output status in the ASCII mode is shown in Figure 3-25 with no mode keys depressed and Figure 3-26 with the SH I FT key depressed.
PAPER ADV
LOW SPEED
CD
•
(CARRIER DETECT INDICATOR)
Figure 3-21. Optional Receive - Only Control Panel (Replaces the Keyboard).
APL
l=f3
KEYTOP LEGEND
. . ~APl SHIFTED CHARACTER
i ..
I\1 APl UNSHIFTED CHARACTER!~ASCII SHIFTED CHARACTER -~ASCII UNSHIFTED CHARACTER
HALF
r-r-l
OUP
i:::::±:::l
80001392
Figure 3-22. Optional APL Keyboard Layout and Symbolization
l?:E~
•
(Carrier Detect Indicatod
A0001395
NOTE: Upperc:ase-only status is ignored in APL mode.
ON
r--1'--1
LINE I:::::±::::]
•
Figure 3-23. Codes Generated in the APL Mode with no Mode Keys Activated (APL Keyboard).
s~~1=f1
I~----~---APL
I=f1
HALFr-T'""l
DLF~
L?:~
A0001396 NOTE: Uppercase-only status is ignored in APL mode.
•
Figure 3-24. Codes Generated in the APL Mode with the SHIFT Key Pressed and Held (APL Keyboard).
A0001397
I~----~---HA LF
r-T'""l
DLF~
NOTE: If UppercasH)nly is enabled (CTRL, SHI FT, g A to Z are printed in
IJPI*C-.
If uppen:ase-onIy is not .... bIed, A to Z are printed in I~
~~~
L':~
•
Figure 3-25. Codes Genented in the ASCII Mode with no Mode Keys Activ .... (APL Keyboa-d).
AOO01398
ON
r-T""""\
LINE
I:::::::!:::::J
•
Figure 3-26. Codes Generated in the ASCII Mode with the SHI FT Key Pressed and Held (APl Keyboard).
Control codes, which are common to both the APL and the ASCII modes, are shown in Figure 3-27.
The following special features are provided on the APL/ASCII keyboard:
1. Repeat - Automatic character repetition is accomplished by holding a code-generating key depressed for longer than
% second.
2.
3.
AOO01399
Backspace - A backspace key is provided to facilitate backspacing in the APL mode for generating overprint characters. This key is active in all modes.
Uppercase/Lowercase Uppercase/
lowercase capability is available only in the ASCII mode. Following initial appli-cation of power, the terminal is automat-ically in the uppercase-only status. The
4.
uppercase/lowercase mode may be se-lected by simultaneously depressing the
ICTR L
I,
I SH I FTI,
and@]
keys. Upper-case-only may be reselected by simulta-neously depressing theI
CTR L ( ,ISHIFT/, and
[]J
keys (or by cycling power OFF-ON). The uppercase/lower-case selection is ignored in the APL mode and is not affected by AP L/ ASC II mode changes.APL Alphabetical and Underscore - In the APL mode all alphabetical characters (A through Z) are generated/printed in lowercase with the dot patterns posi-tioned in the upper portion of the 5 x 7 dot matrix. This makes possible true underscoring of alphabetical characters without overprinting.
A programmable ROM is used to implement the APL option with or without ABM.
ON
r-T""""\
LINE
I:::::::!:::::J
NOTE: 0 A blank key indicates that a NU L code is transmitted.
•
Figure 3-27. Codes Generated in APl or ASCII Mode with the CTRl Key Pressed and Held (APl Keyboard).
3.6.5 KATAKANA KEYBOARD. The optional katakana keyboard shown in Figure 3-28 en-ables the terminal to transmit/receive both standard U.S. ASCII characters and katakana characters.
Two special keys are provided: the KANA mode key permits generating/printing the characters shown in Figure 3-29 and 3-30. The ALPHA mode key permits generating/printing the characters shown in Figures 3-31 and 3-32. The control codes shown in
The Alpha Mode Indicator is ON for the Keyboard Alpha Mode and OFF for Keyboard Kana Mode.
AlpM Mode (SI) and Kana Mode (SO) ch.-.cws cannot be ... lIIiIII ... REPT key.
AOO01201 Figure ~28. Optional Katakana KeybcNwd Layout and Symbolization