CROSS REFERENCE TABLE GENERATOR

DESCRIPTION

The Cross Reference Table Generator routine processes an Assembler source pro-
gram and prints a cross reference list of all symbols appearing in the program.
The List contains the symbols in alphabetic order.t Each is followed by the 4-digit
sequence number of the statement in which the symbol was defined and the sequence
numbers of all statements referring to the symbol. If the source program is con-
tained on more than one tape, the tape number follows the statement sequence num-
ber. The tape number is determined t;y the order in which the tapes are submitted
to the generator routine; it is not printed for the first tape.

OPERATING PROCEDURES

The following procedures indicate the sequence of steps for execution of the Cross
Reference Table Generator:

A. Set Teleprinter to LINE and check that all equipment to be used is operable.

B. Load Cross Reference Table Generator using the Basic Binary Loader. $

C. Set Switch Register to starting address of Cross Reference Table Generator:

                    000100

D. Press LOAD ADDRESS.

E. Place source language tape in unit serving as the Standard Input unit (e.g.,
   Punched Tape Reader).

F. Press RUN.

G. At the end of each tape other than the last, the message "END OF TAPE" is
   printed and the computer halts. Repeat E and F.

H. At the end of the last tape (the tape containing the END statement), the table is
   printed on the Standard List Output device (e.g., Teleprinter). When the table
   is printed, the computer halts.

During the operation of the routine, the following may be printed:

Teleprinter
Message          Explanation                 Action

DD (symbol)      A doubly defined symbol     Correct source program
                 has been encountered.       after completion of rou-
                 The computer does not       tine.
                 halt.

-------------------
t If the magnetic tape version of the Cross Reference Table Generator is used, it
  must be executed immediately after the completion of an assembly. It processes
  the information written on the scratch area of the tape by the Assembler.

$ The appropriate System Input/Output subroutines (drivers) are assumed to be in-
  cluded on the Cross Reference Table Generator tape.

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Teleprinter        
Message           Explanation              Action             

TABLE           The combined number of    Irrecoverable error. If
OVERFLOW        symbols and references    the Table is necessary,
                to them exceeds the ca-   the source program
                pacity of the routine.    must be revised.

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