J28-6169, 06.04.03

The text read off it

[06.04.03]

The first record of each file on SYSUT4 after the $EXECUTE card should be a CTM control card (usually $CMPLE card). By this method, it is possible to maintain source programs on BCD master tapes; and, as desired, change, compile, and execute particular programs in one operation. The form of SYSIN for this type of use of the Commercial Translator Processor might be:

$DATE          mmddyy              Current Date
$ATTACH        D2
$AS            SYSUT4              (Low Density)
$EXECUTE       CT
    *MAIN      C                   Go to Maintenance Routine
    *FILE      A                   Changes to source program on master tape
changes
    .
End-of-file card
$IBSYS                             Return to Basic Monitor
$SWITCH        SYSIN1,SYSUT4       Switch input units and process the source program
$PAUSE

Control Cards

The control cards used to direct the Symbolic Maintenance program fall into two categories.

Cards used to initiate action on a given file are called major control cards. Their format follows this general pattern:
```
1        8          16
Name    {operation}  [option]
```
Changes to the file 'Name' can be made only if it is referenced by one of these cards. If not, the file is copied, exactly as it stands, onto the new master tape: or, if there is no new master, it is simply ignored.
Modifications within a file are described by the minor control cards. The format pattern of these cards is:
```
1        8          16
Name    {operation}  mmmm,nnnn
```
A card of this form following a major control card which references file 'Name indicates that modification is to occur from sequence numbers mmmm to nnnn inclusive. Cards following the minor control card are used for the modification; their extent being delimited by the occurrence of another control card.