H-4
Function/Control Key Support in Wedge Mode
The TriCoder, when in keyboard wedge mode or serial PC Terminal mode, can
transmit
Function, Control
,
Alt
and
Shift
Keys
for use with software programs
that use these keys for menus or commands. For example, when the TriCoder
reads a bar code containing the Code 39 characters for SOH (Control-A), it will
transmit the corresponding function key, F1 to your computer.
These "keys" are created by combining two Code 39 characters. In order to
read them and have them interpreted as the correct keystroke, the bar code
reader must have "
Full ASCII Code 39
" reading enabled. The following
chart shows the encoding scheme for both IBM and Macintosh computers.
Full ASCII Code
Code 39
IBM PC key transmitted
Mac key transmitted
SOH $A
F1 F1
STX $B
F2 F2
ETX $C
F3 F3
EOT $D
F4 F4
ENQ $E
F5 F5
ACK $F
F6 F6
BEL $G
F7 F7
SO $N F8 F8
LF
$J
Num Pad 5*
Enter
CR $M Enter
Return
SI $O F9 F9
DLE $P F10
Command
On
DC1 $Q Del Del
DC2 $R Insert
Command
Off
DC3
$S
Left Arrow*
Left Arrow
DC4
$T
Right Arrow*
Right Arrow
NAK
$U
Down Arrow*
Down Arrow
SYN
$V
Up Arrow*
Up Arrow
VT
$K
Page Up*
Page Up
FF
$L
Page Down*
Page Down
ETB $W Home*
Home
CAN $X End* End
EM
$Y
Shift On
Shift On
SUB
$Z
Shift Off
Shift Off
FS
%B
Control On
Control On
GS
%C
Control Off
Control Off
RS %D Alt
On
Option
On
US %E Alt
Off
Option
Off
*Refers to the keys on the Number Pad on the far right side of a PC keyboard
Table A-3. C39 Keyboard Support for IBM and Mac
