Baudot code
<communications> (For etymology, see baud) A character set predating EBCDIC and used originally and primarily on paper tape.
Use of Baudot reportedly survives in TDDs and some HAM radio applications.
In Baudot, characters are expressed using five bits.
Baudot uses two code sub-sets, the "letter set" (LTRS), and the "figure set" (FIGS).
The FIGS character (11011) signals that the following code is to be interpreted as being in the FIGS set, until this is reset by the LTRS (11111) character.
binary
hex
LTRS
FIGS -------------------------- 00011
03
A
- 11001
19
B
? 01110
0E
C
: 01001
09
D
$ 00001
01
E
3 01101
0D
F
! 11010
1A
G
& 10100
14
H
# 00110
06
I
8 01011
0B
J
BELL 01111
0F
K
( 10010
12
L
) 11100
1C
M
. 01100
0C
N
, 11000
18
O
9 10110
16
P
0 10111
17
Q
1 01010
0A
R
4 00101
05
S
' 10000
10
T
5 00111
07
U
7 11110
1E
V
; 10011
13
W
2 11101
1D
X
/ 10101
15
Y
6 10001
11
Z
" 01000
08
CR
CR 00010
02
LF
LF 00100
04
SP
SP 11111
1F
LTRS
LTRS 11011
1B
FIGS
FIGS 00000
00
[..unused..]
Where CR is carriage return, LF is linefeed, BELL is the bell, SP is space, and STOP is the stop character.
Note: these bit values are often shown in inverse order, depending (presumably) which side of the paper tape you were looking at.
Local implementations of Baudot may differ in the use of #, STOP, BELL, and '.
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