Example: TESTCB macro (test a request parameter list)

        TESTCB RPL=(3),                                                x
               RECLEN=80
 
         BE    NOCHNGE
 
CHANGE   ...               Because record length in the RPL not 80,    x
                           modify length indicator so it is 80.
 
NOCHNGE  ...               Because record length in the RPL is 80,     x
                           no change required.

The TESTCB macro's parameters are:

RPL specifies that the address of the request parameter list to be tested is contained in register 3.
RECLEN specifies that the record length indicated in the request parameter list is to be tested to determine whether it is 80.