SLU P compatibility

Application programs written for other MFS-supported devices can execute unchanged with SLU P (DPM-An) devices once the DIFs and DOFs appropriate for the DPM devices are defined.

Changes might be required if the program depends on unique device-dependent features such as premodified fields on a 3270 display. The program would execute unchanged only if the premodified fields presented to the remote program are returned in the input message. This requires that the remote program properly interpret the attribute bytes of the output message field and handle the indicated device function in a way that satisfies the requirements of the IMS application program.

Existing IMS application programs that do not use MFS might have to be changed to adjust to the appropriate 3600 or 3790 buffer size and to ensure that message text is a compatible subset of the SCS character string.