Gascii-Ebcdic Translation Table - Texas Instruments 990 User Manual

. I . .
_, -•• -•••• -- --0 ••• •---- ·-·-- ·- •• "• • • •• .·----•
~-·••-..___•·-··--~----'--- ·---~~----------·L...::._,..:_
__ :_.....'..:_ ____ • , __ :., .. • • ------------·· •
~-1-•
·- ,,_.._.....,. _ _ _
m _ _ _ _ _ _ _
~
946289-9701
APPENDIX G
ASCII - EBCDIC TRANSLATION TABLES
The IBM 3780 and 2780 protocol employed by the Emulator requires that the data be transferred as
EBCDIC encoded data. The translation from the user data, prepared in ASCII code, to EBCDIC
code is performed automatically by the Emulator so that line requirements are transparent to the
user. Those EBCDIC characters less than >40 for which ASCII has no equivalent are translated to
null characters; those EBCDIC characters >40 or greater for which ASCII has no equivalent are
translated to space characters. Table G-1 gives ASCII to EBCDIC translation and table G-2
provides EBCDlC to ASCII translation. With transparency ON, the entire ASCII character set in
table G-1 may be transmitted; received. With transparency OFF, the characters SYN, ENQ, ITB
(US), IRS (RS), ETX, ETB, EM (for 2780), and GS (for 3780) may not be transmitted/received as
data. Also, with transparency OFF, DCl, DC2, DC3, and ESC should not be transmitted as the first
character of a data record because they will be interpreted by the receiving station as a device
selection or as a vertical format control specification. To transmit/receive the entire EBCDIC
character set in table G-2, the data must be transmitted/received in binary (990 to -990
communication only).
Table G-1. ASCII-EBCDIC Translation
ASCII
ASCII
EBCDIC ASCII
ASCII
EBCDIC
Value
Character Value Value
Character
Value
()()
NUL
()()
18 CAN 18
01 SOH 01
19 EM 19
02
STX 02
IA SUB 3F
03 ETX
03
IB ESC 27
04
EOT
37
IC FS IC
OS ENQ
20
ID GS ID
06
ACK
2E IE RS
IE
07 BEL
2F IF
us
IF
08
BS 16
20
SPACE
40
09 HT
05 21 SA
OA LF
25 22
..
7F
OB
VT
OB
23 #
7B
oc
FF
oc
24
s
SB
I
OD CR
OD
25
%
6C
OE
so
OE 26
"
so
OF SI
OF
27
70
JO OLE
10
28
(
40
II DCI
11
29
t
SD
12 DC2
12 2A •
SC
13 DC3
13
2B
+
4E
14
DC4
3C 2C 6B
15
NAK
30 20
60
16
SY!\
32 2E 4B
17
ETB
26 2F
61
G-1
Digital Systems Group