Writing the procedure that starts TSO/VTAM time sharing

You must write a procedure for starting TSO/VTAM time sharing. Include the procedure in either SYS1.PROCLIB or in an installation-defined procedure library.

Figure 1 is an example of starting TSO/VTAM time sharing.

Figure 1. Sample procedure to start TSO/VTAM time sharing

//TCAS      PROC    MBR=TSOKEY00
//STEP1     EXEC    PGM=IKTCAS00,PARM='&MBR',TIME=1440
//PRINTOUT  DD      SYSOUT=A,FREE=CLOSE

The procedure must contain the following statements:

PROC

names the procedure and, optionally, assigns default values to symbolic parameters defined in the procedure. In Figure 1, the PROC statement assigns the name TCAS to the procedure and designates a default SYS1.PARMLIB member (TSOKEY00). To start TSO/VTAM time sharing, the operator enters:

START TCAS

EXEC

identifies the program to be executed (IKTCAS00), a parameter to be passed on the invocation of IKTCASS00, and the maximum amount of time allowed for executing STEP1 (1440). The parameter passed to program IKTCASS00 is the symbolic parameter &MBR, which is defined in the PROC statement.

PRINTOUT DD

identifies where the time sharing parameters used are written. In Figure 1, the PRINTOUT statement specifies that time sharing parameters be written to the device associated with output class A, and that the output data set be deallocated when it is closed.