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Appendix F. IBM-Supplied Translate Tables
This appendix describes the character conversions that the 3708 performs before
sending data to the host and the end user devices, and it gives the standard 3708
translate tables for EBCDIC and ASCII characters.
Converting Between ASCII and EBCDIC
All data, commands, and orders sent between the 3708 and the SNA host are in the
Extended Binary-Coded Decimal Interchange Code (EBCDIC). The EBCDIC
values that the 3708 accepts are outlined in Figure E-2. The 3708 translates the
EBCDIC characters into ASCII characters to send to the device.
The following table, Figure F-I, shows the characters, the EBCDIC values, and bits
2 through 7 that are transmitted.
Note: If the 3708 receives a 08nn sequence (APL), the 3708 sends a colon (;). If the
3708 receives a print order, the 3708 sends a blank and stores the order in a buffer.
If the high order bit in the translated character is on, the 3708 sends a colon (;).
Data that is sent to the host is translated from ASCII to EBCDIC. However, the
translation can be changed to anything. For information on creating a user-defined
translate table, refer to IBM 3708 Network Conversion Unit Planning and Installation.
In protocol conversion mode, attribute characters, buffer addresses, and write
control characters (WCC) must be converted so that they can be represented by valid
EBCDIC values. To do this, the last 6 bits are used to determine the first 2 bits
using the table in figure E-2. For example, if the last 6 bits are b' 001001' , they
would be mapped to the EBCDIC graphic character I and the EBCDIC value C9.
Therefore, the first 2 bits are b'll' because C9 is b'llOO1001.'
Note: When operating in LU type 1 SCS transparency mode, no translation is done
unless nonstandard operating bit 8 is set to
1.
Appendix F. IBM-Supplied Translate Tables
F-l
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