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Offset<br />
33 (21)<br />
Byte and<br />
Alignment<br />
34 (22) •• 1<br />
35 (23) • 1<br />
36 (24) 4<br />
40 (28) 4<br />
44 (2C) 4<br />
44 (2C)<br />
45 (2D)<br />
48 (30) 64<br />
112 (70) 1<br />
113 (71) • 3<br />
116 (74) 4<br />
120 (78) 4<br />
124 (7C) 4<br />
128 (80) 4<br />
Field<br />
Name<br />
i'T'\i"1-r.T::'lT ,. •• -..<br />
..L\...D.l'.1"Uu<br />
(Continued)<br />
Byte 5<br />
1 •••<br />
• 1 ••<br />
•• 1.<br />
. • • 1<br />
..<br />
..L •••<br />
.1 ..<br />
TCBLMP<br />
TCBDSP<br />
TCBLLS<br />
TCBJLB<br />
TCBJPQ<br />
.. 1.<br />
••. 1<br />
Byte 1<br />
1 •••<br />
.xxx xxxx<br />
Bytes 2-4<br />
TCBGRS<br />
TCBQEL<br />
TCBFSAB<br />
TCBTCB<br />
TCBTME<br />
TCBJSTCB<br />
TCBNTC<br />
TASK CONTROL BLOCK -- MVT<br />
Hex.<br />
Dig. Field Description, Contents, Meaning<br />
(If any bit in this byte is 1, the task is<br />
non-dispatchable.)<br />
Terminated.<br />
To be terminated by ABEND •<br />
A routine of this task has issued an unconditional<br />
GETMAIN which must be satisfied by rollout of another<br />
job step.<br />
The job step has been rolled out •<br />
Another task is in system-must-complete status •<br />
Another task in this job step is in<br />
step-must-complete status.<br />
Initiator task: request for a region Could not be<br />
satisfied.<br />
primary non-dispatchability bit. This bit is set to<br />
1 if any of the secondary non-dispatchability bits<br />
(offset 173 through 175) is set to 1. This bit is<br />
set to 0 if a secondary non-dispatchability bit is<br />
set to 0 and all other secondary non-dispatchability<br />
bits are O.<br />
Limit priority for this task.<br />
Dispatching priority for this task.<br />
Address of load list element (LLE) for program loaded<br />
via the LOAD macro instruction.<br />
Address of a JCBLIE DCB.<br />
Job step TCB:<br />
Purge flag.<br />
(Reserved bits)<br />
Address of last entry in contents directory for job<br />
pack area (JPA) control queue.<br />
General register save area.<br />
Number of resources for which this task is enqueued:<br />
Address of the first problem program save area.<br />
Address of next TCB of lower priority on the ready<br />
queue.<br />
Address of the timer queue element.<br />
Address of the first TCB for a job step. For tasks<br />
with a protection key of zero, this field contains<br />
the address of this TCB.<br />
Address of the TCB for the task previously attached<br />
by the task that attached this task.<br />
For example: If task A attached task B and then task<br />
C, this field in task CiS TCB points to task B's TCB,<br />
and this field in task B's TCB is zero.<br />
TCB -- MVT 329
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