Dynapro Technologies Dynapro ET TCS, Application Developer'S Manual

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7-2
The Space Bar normally moves the cursor one space to the right, leaving an invisible space
character in its place.
The Scroll Lock key is a toggle. The first press freezes the display by causing the TCS to stop
processing codes. The second press allows the TCS to resume processing codes. If the host
continues to send codes while Scroll Lock is in effect, the TCS input buffer may fill, prompting
the TCS to stall the host.
The Ctrl key alone does not send a code. It is used with other standard keys to send control codes
by holding down the Ctrl key while pressing another key. For example, the Ctrl key can be used
to send a control code that causes the TCS to beep. The keystroke Ctrl/G (when echoed to the
TCS) normally cause the beeper to sound. Table 7-2 shows the codes that the TCS transmits
when various keys are pressed with the Ctrl key. The action caused by sending these control
codes to the host computer is determined by the application software running on the host
computer.
The Caps Lock key locks when pressed, and unlocks when pressed again. When the Caps Lock
key is locked, all alphabetic keys generate capital letters. When the Caps Lock key is unlocked,
all alphabetic keys generate lowercase letters (unless an alphabetic key is pressed with the Shift
key). Numeric or symbolic keys are unaffected by the Caps Lock key. The LED indicator on the
Caps Lock key is lit when the key is locked, and off when the key is unlocked.
The Tab key normally moves the cursor one tab space to the right.
The Esc (escape) key generates the ASCII <ESC> code (1B Hex).
7DEOH1RQ$OSKDQXPHULF6WDQGDUG.H\&RGHV
.(< &2'(66(1772+267
+(;$'(&,0$/
01(021,&6
'HOHWH
7DE
5HWXUQ
6SDFH%DU
(VF
%DFN6SDFH
)
'RU'$
%
'(/!
+7!
&5!RU&5!/)!
63$&(!
(6&!
%6!
7KH1HZ/LQH0RGHGHWHUPLQHVZKLFKFRGHVDUHVHQW6HH&KDSWHU