Msos 5.0 Differences - Control Data 3170 Installation Handbook

1.4.2 MSOS
5.0
DIFFERENCES
The following differences between MSOS 5.1 and MSOS 4.2 may require recoding of
programs or changing of deck structures.
1. The offset format request is set up to offset the next card to punch. Under
MSOS 4.2, the request would offset the last card punched, provided that the
user could get back within 5 milliseconds.
2. A batch job aborts when the time limit on the JOB card or the system default
time limit is exceeded.
3. The FET control statement requires a block size and if the edition is alpha-
betic, requires a 2-character edition field.
4. The EQUIP statement for mass storage is illegal.
5. File 55 must always be open when loading relocatable programs, since the
loader uses this file to absolutize programs.
6. The new PRIORITY statement replaces the BACK statement. The BACK state-
ment is no longer recognized.
7. The PURGE function of MSUTIL is now a privileged task and requires specifi-
cation of the system security codes before execution. PURGE requires that a
file be closed before the file is released.
8. Auxiliary libraries now require a block size of 960 characters.
9. The RPT table has been rearranged. Any use of this table by user programs
must be investigated and possibly recoded.
10. The AUT table consists of up to 50 4-word entries and replaces the AET table.
11. The RHT and BRHT tables no longer exist. Refer to WHATKIND for a func-
tional replacement.
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