Control Data Corporation CYBER 170 Series Operator's Manual page 166

BATCH USERS
Table A-I lists the CDC graphic 64-character set, the
ASCII graphic 64-character set, and the ASCII graphic
95-character sets.
It
also lists the code sets and card
punch codes (026 and 029) that represent the characters.
The 64-character sets use display code· as their code set;
the 95-character set uses 12-bit ASCII code. The
95-character set is composed of all the characters in the
ASCn 12S-character set that can be printed at a line
printer (refer to Line Printer Usage). Only 12-bit ASCII
code files can be printed using the ASCII graphic
95-character set. To print a 6/12 display code file (usually
created in time-sharing ASCII mode), the user must convert
the file to 12-bit ASCII code. To do this, he issues the
FCOPY control statement (refer to the NOS Reference
Manual, Volume 1). The 95-character set is represented by
12-bit ASCII codes 0040S through 01768.
LINE PRINTER USE
The batch character set printed depends on the print train
used on the line printer to which the file is sent. The
following are the print trains corresponding to each of the
batch character sets.
Character Set
CDC graphic 64-character set
ASCII graphic 64-character set
ASCII graphic 95-character set
Print Train
596-1
596-5
596-6
The characters of the default 596-1 print train are listed in
the table A-I column labeled CDC Graphic (64 Char); the·
596-5 print train characters are listed in the table A-I
column .labeled ASCII Graphic (64 Char); and the 596-6
print train characters are listed in the table A-I column
labeled ASCII Graphic (95 Char).
If a transmission error occurs when printing a line, the
system prints the line again. The CDC graphic print train
prints a concatenation symbol
(r)
in the first printable
column of a line containing errors. The ASCII print trains
print an underline (-) instead of the concatenation symbol.
If
an unprintable character exists in a line (that is, a 12-bit
ASCII code outside of the range 0040S through 0176S, the
number sign
(#)
appears in the first printable column of a
print line and a space replaces the unprintable character.
. MAGNETIC TAPE USERS
Coded data to be copied from mass storage to magnetic
tape is assumed to be represented in display code. NOS
converts the data to external BCD code when writing a
coded 7-track tape and to ASCII or EBCDIC code (as
specified on the tape assignment statement) when writing a
coded 9-track tape.
Because only 63 characters can be represented in 7-track
even parity, one of the 64 display codes is lost in
conversion to and from external BCD code. Figure A-I
shows the differences in conversion depending on the
character set (63 or 64) which the system uses.
If a lowercase ASCII or EBCDIC code is read from a
9-track coded tape, it is converted to its uppercase 6-bit
display code equivalent. To read and write lowercase
ASCII or EBCDIC characters, the user must assign the tape
in binary mode and perform his own conversion of the
binary data.
Table A-3 lists the uppercase character codes and their
display code equivalents. Table A-4 lists the display code
equivalents for lowercase character codes read.
63-Character Set
Display Code
External BCD
Display Code
00
16
00
33 Output
12 Input
33
63
----..
----..
12
33
64-Character Set
Display Code
External BCD
Display Code
00
12
33
33
Output
12 Input
33
63
----..
----..
16
63
Figure A-I. Conversion Differences
A-2
60435600
J