The text read off it
[06.04.01]
06.04 SYMBOLIC TAPE MAINTENANCE
The Symbolic Tape Maintenance program will update a master tape of card files, optionally producing a new master tape, and selectively producing a second output tape intended for assembly or job input. Information, as directed, is taken from the master tape (SYSLB3) or from control and alteration cards on the input tape (SYSIN1). If a new master is created, it is written on (SYSLB4); while the second output is written on SYSUT4, and, as an alternate unit, SYSUT3. SYSLB3, and SYSLB4 must be single-reel files. No provision is made for end-of-reel tape switching on SYSLB3.
Control is given to the Symbolic Maintenance program when CTM recognizes a control card of the form:
1 16
$MAIN [M] [,B] [,C]
The interpretation applied to the variable field of this card is:
[M] — Create a new master tape.
[B] — The second output tape is to be blocked 10 records per block.
[C] — This specifies that the second output tape is going to serve as input to the Commercial Translator Compiler. The B option should not be used when the tape is intended for input to the Compiler.
Tape Formats
Each file on the master tape consists of 14 word card records, the first of which may have either of the following formats:
1 7 15
* *FILE Name or
8
Name *FILE
Only the latter form will be written on the new master tape where 'Name' is a four character (or less) identifier for the file. The identifier is used to reference a given file, and forms part of the sequence numbers attached to the cards of the file.
The sequence numbers are created by the routines when this file is first placed on the master tape. Their form is:
Namennn
and they occupy positions corresponding to columns 73-80 of the card. Individual cards of a file are referenced by these numbers, in order to indicate the nature and extent of any changes which are to be made. Enumeration begins with 1, on the first card following the *FILE card, and is in unbroken sequence. Since there are only four digits, numbers from 10,000 to 10,999 use + as the first digit, numbers from 11,000