Specifies a location one byte in length that contains the dispatching
mode that is to be set for the FCT. If a register is specified, the
mode is contained in the high-order byte. This parameter permits a
previously saved mode to be restored.
MODE=
Specifies the FCT execution mode.
ATASK
Specifies that the caller desires to execute under the JES3
auxiliary task.
NTASK
Specifies that the caller desires to execute under the JES3
primary task.
SAVMODE=
Specifies a location one byte in length where the current FCT
execution mode is to be saved. If a register is specified, the mode
is saved in the high-order byte. Register 0 cannot be specified because
it is used as a parameter register to the “set mode” service.
The SAVMODE parameter may be specified only with the MODE parameter.