Introduction

It is easy to write your own ADAM A-tasks which can be run from ICL in the same way as the KAPPA programs. This is the easiest way of allowing ICL to run your own FORTRAN programs^10.1. A detailed discussion of writing A-tasks can be found in SG/4 and SUN/101.

Here is a simple example of an ADAM A-task. Its source code consists of the FORTRAN source file MYTASK.FOR containing the following:

    SUBROUTINE MYTASK(STATUS)
    IMPLICIT NONE
    INTEGER STATUS

    CALL MSG_OUT(' ','Hello',STATUS)

    END

The example task consisted essentially of just one statement -- the call of MSG_OUT. This routine is part of a subroutine library which is provided for outputting information to the terminal. The MSG_ routines should always be used for terminal output from ADAM tasks. FORTRAN PRINT and WRITE statements must not be used for this purpose.

Every ADAM task also has an interface file. The interface file contains information on the parameters of the task. Our task doesn't have any parameters so its interface file is fairly simple. It consists of the following in the file MYTASK.IFL.

    INTERFACE MYTASK
    ENDINTERFACE