Formats; Cosy Binary Cards; 3200 Format - Control Data 3500 Reference Manual

5.1
COSY BINARY
CARDS
5.1.1
3200 FORMAT
5.1.2
3300 FORMAT
FORMATS
To allow use of existing COSY libraries, blocked COSY tape input accepts.
3200 COSY BCD format. The 3200 format restricts the BCD character set
available to the user; the 3300 format used under MASTER does not.
In 3200 COSY BCD compressed format, COSY compresses card images by
inserting special BCD characters for two or more sequential blanks.
5
Octal numbers 16, 17, 35, 36, 37, 55, 56 and 57 represent two through nine
consecutive blanks. If a card image contains more than nine consecutive
blanks, 76xx
8
is used; the 6-bit numberr xx is ten (decimal) less than the .
number of blanks. If the image contains more than 73 blanks, 76778 is used
with one of the above special octal numbers. The character 128 indicates
the end of a compressed card image. If the user employs any of the special
characters above, COSY replaces it by 15 8 ; this restricts the character set
available to the COSY user.
The 3300 COSY format used under MASTER makes all BCD characters
available to the user. COSY compresses a card image by inserting a
special BCD character and value for two or more sequential blanks.
The system operates internally as follows:
12
8
is the special BCD character
1200
8
BCD character 128
1275
8
End of card character
1276
8
End of deck character
1277
8
End of revision set character
12xx
8
xx consecutive blanks, 02::; x
<
75
5-1