Subsystem request specification - key = '005C'

DALSSREQ requests that a subsystem data set be allocated and, optionally, specifies the name of the subsystem for which the data set is to be allocated.

When you code DALSSREQ without specifying a subsystem name, # must be zero and LEN and PARM are not specified. The data set is then allocated to the primary subsystem.

When you code the subsystem name in the DALSSREQ key, # must be one, LEN is the length of the subsystem name, up to a maximum of 4, and PARM contains the subsystem name.

Note: To specify DALSSREQ, your program must be APF-authorized, in supervisor state, or running with PSW key 0 - 7. If your program does not meet these requirements, you may be able to use the DALUASSR text unit instead.

Example 1: To request a subsystem data set for the primary subsystem, code:

KEY    #      LEN   PARM
005C   0000   -     -

Example 2: To request a subsystem data set for JES2, code:

KEY    #      LEN    PARM
005C   0001   0004   D1 C5 E2 F2