In the following discussion the symbol Ø signifies the letter O where necessary for emphasis, and the symbol Δ signifies a 7-9 punch in card column 1.
ALGOL Control System
The compiler operates under the ALGOL Control System. This system is a subordinate control routine of the Master Control System of the CO-OP Monitor Programming System. ALGOL is quite similar to the subordinate control routine COOP.
ALGOL is called with an MCS (Master Control System) card having ALGOL punched beginning in column 2. Other details of this card are available in descriptions of the CO-OP Monitor. It should be noted in selecting a standard recovery procedure that the concept of COMMON is not used in Algol.
Following the MCS card will be a control card giving instructions to the control routine ALGOL. It will name one of the following routines: ALGO, ALDAP, EXECUTE, BINARY, FORTRAN, REWIND or DEFINE. These will be discussed below.
EOP Card
The EOP (end-of-program) card has the characters 'EØP' punched in columns 10-14.
In the ALGO mode, one EOP card must be used to terminate the program.
In the ALDAP mode, one EOP card must be used to terminate each Algol program or Algol procedure being compiled separately.