The text read off it
[06.04.02]
to 11,999 use A as the first digit, numbers from 12,000 to 12,999 use B as the first digit, etc. A single file is limited to 99,999 cards. When a file is modified, new sequence numbers are automatically created reflecting the re-ordering necessary to account for any insertion and deletions. The *FILE card is never written on the second output tape.
The last file of a master tape is exceptional. It must consist of a single card which may have either of the following formats:
1 7
* *END or
8
*END
which serves to delimit the extent of the tape. Only the latter form will be written on the new master.
An end-of-file mark must follow the last card of every file on the master tape.
A master tape created by the program is alwyas blocked 10 records per block, and may be listed on the 720A with the group switch set in the "10" position. If the blocking option B is chosen for the second output tape, however, it cannot be listed on the 720A. The input tapes, both master and alteration, will process correctly with any blocking factor of 10 or less.
If the C option is used on the $MAIN card, the second output tape, SYSUT4, if of the following form:
- The first record on SYSUT4 is $EXECUTE CT
- Three additional records are placed after the last end-of-file on the SYSUT4 tape:
$IBSYS
$*MAIN JOB STACK COMPLETED
$SWITCH SYSIN1, SYSUT4