User`s guide

6: BSC 2780/3780 Link Configuration Options
DC 900-1340I 165
6.9 Data Translation Option (10)
This option invokes transmit and receive data translation using one of the two onboard
ASCII/EBCDIC translation tables described in Appendix C, either of which can be
changed by issuing a Set Translation Table command (Section 5.4.1.1 on page 118).
This option is enabled only when the character set option (Section 6.7) is set to
EBCDIC.
If this option is set to disable, no data translation is performed, but EBCDIC control
sequences are used on the line. In this case, the client application program is responsible
for performing any necessary data translation.
When one of the translation tables is selected, data translation is enabled. Data blocks
from the client are treated as ASCII data and are translated into EBCDIC before they are
transmitted on the communication line. Conversely, data blocks received from the line
are treated as EBCDIC and are translated to ASCII before they are sent to the client.
The BSC 2780/3780 software translates data from transparent as well as non-transpar-
ent data blocks. Tabl e 6– 2 illustrates the proper data translation settings for various
types of data.
Table 6–2: Recommended Data Translation Settings
Type of Data
Required Data
Translation Setting
Reason for Setting
Transparent 2780 Disable Required because of the transparent 2780 count
characters. See Section 5.4.3.3 on page 148.
Transparent 3780
(non-text)
Disable Required because some ASCII control characters
do not translate to an EBCDIC equivalent.
Transparent 3780 Enable or Disable Same for either setting.
Non-transparent text Enable Required when the character set is EBCDIC
CRC16 because some ASCII text characters are
equivalent to EBCDIC control characters; for
example, ASCII 32 is an EBCDIC SYN character.