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