Some of the routines have been modified by developers for their own purposes. In order to make those changes and improvements available to all A-Shell users, many of the more common and useful modifications have been implemented as configurable patches. These are specified using the SBR command in the system configuration file. The subroutines which have configurable functionality are:

The subroutines GETJTB, SETJTB and PRTCHK are supplied for use under AMOS in the AMOS subdirectory. It is hoped that this will ease the writing of portable code. In particular, use of GETJTB can eliminate the need for many of the GETxxx routines to get information about your job, terminal, ppn, etc.