Transcode (character encoding)

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For other uses, see Transcode (disambiguation).

Transcode, or Transmission Code, was a 6-bit plus parity BCD character set which was used by IBM for a short time for Binary Synchronous communications. The IBM 2780 data transmission terminal was announced with Transcode support in 1967. The IBM 3780 data communication terminal, the 2780 successor announced in 1972, dropped Transcode support.

Transcode was a 64 character set including twenty-six upper case alphabetic characters, ten numerics, thirteen special characters, and sixteen control characters. Characters were transmitted with odd parity.[1]

Character
  		Punched card
code 		6-bit
transcode 		Hex 
SOH 12-9-1              P 00
A 12-1            5   01
B 12-2          4     02
C 12-3          4 5 P 03
D 12-4        3       04
E 12-5        3   5 P 05
F 12-6        3 4   P 06
G 12-7        3 4 5   07
H 12-8      2         08
I 12-9      2     5 P 09
STX 12-0-2      2   4   P 0A
. 12-9-3      2   4 5   0B
⌑ 12-9-4      2 3     P 0C
BEL 0-9-8-7      2 3   5   0D
Sub 9-8-7      2 3 4     0E
ETB 9-8-6      2 3 4 5 P 0F
& 12    1           10
J 11-1    1       5 P 11
K 11-2    1     4   P 12
L 11-3    1     4 5   13
M 11-4    1   3     P 14
N 11-5    1   3   5   15
O 11-6    1   3 4     16
P 11-7    1   3 4 5 P 17
Q 11-8    1 2       P 18
R 11-9    1 2     5   19
Space no punch    1 2   4     1A
$ 11-8-3    1 2   4 5 P 1B
* 11-8-4    1 2 3       1C
US 11-9-8-7    1 2 3   5 P 1D
EOT 9-7    1 2 3 4   P 1E
DLE 12-11-9-8-1    1 2 3 4 5   1F
- 11  0             20
/ 0-1  0         5 P 21
S 0-2  0       4   P 22
T 0-3  0       4 5   23
U 0-4  0     3     P 24
V 0-5  0     3   5   25
W 0-6  0     3 4     26
X 0-7  0     3 4 5 P 27
Y 0-8  0   2       P 28
Z 0-9  0   2     5   29
ESC 9-8-7  0   2   4     2A
' 0-8-3  0   2   4 5 P 2B
% 0-8-4  0   2 3       2C
ENQ 0-9-8-5  0   2 3   5 P 2D
ETX 12-9-3  0   2 3 4   P 2E
HT 12-9-5  0   2 3 4 5   2F
0 0  0 1         P 30
1 1  0 1       5   31
2 2  0 1     4     32
3 3  0 1     4 5 P 33
4 4  0 1   3       34
5 5  0 1   3   5 P 35
6 6  0 1   3 4   P 36
7 7  0 1   3 4 5   37
8 8  0 1 2         38
9 9  0 1 2     5 P 39
SYN 9-2  0 1 2   4   P 3A
# 8-3  0 1 2   4 5   3B
@ 8-4  0 1 2 3     P 3C
NAK 9-8-5  0 1 2 3   5   3D
EM 11-9-8-1  0 1 2 3 4     3E
DEL 12-9-7  0 1 2 3 4 5 P 3F

Devices using Transcode

  • IBM 2701 Data Adapter Unit.
  • IBM 2703 Transmission Control.
  • IBM 2780 Data Transmission Terminal.
  • IBM System/370 model 135 Integrated Communications Adapter (ICA).

References

  1. ↑ IBM Corporation (1971). Component Description: IBM 2780 Communications Terminal. 
Character sets
Early telecommunications
ISO/IEC 8859
Bibliographic use
  • ANSEL
  • ISO 5426 / 5426-2 / 5427 / 5428 / 6438 / 6861 / 6862 / 10585 / 10586 / 10754 / 11822
  • MARC-8
National standards
EUC
  • CN
  • JP
  • KR
  • TW
ISO/IEC 2022
  • CN
  • JP
  • KR
  • CCCII
MacOS codepages ("scripts")
DOS codepages
Windows codepages
EBCDIC codepages
Platform specific
Unicode / ISO/IEC 10646
Miscellaneous codepages
Related topics
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