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Byte and Field<br />
Offset Alignment Name<br />
-32 (-20) 32 TCBFRS<br />
o (0) 4<br />
4 (4) 4<br />
8 (8) 4<br />
12 (C) 4<br />
16 (10) 4<br />
16 (10) 1<br />
11 (11) • 3<br />
20 (14) 4<br />
20 (14) 1<br />
21 (15) • 3<br />
TCBRBP<br />
TCBPIE<br />
TCBDEB<br />
TCBTIO<br />
TCBCMP<br />
Byte 1<br />
1 •••<br />
• 1 •.<br />
• .xx xxxx<br />
Bytes 2-4<br />
TCBTRN<br />
TCBFLTRN<br />
1 •••<br />
. 1 •.<br />
· .1.<br />
• •• 1 1 ...<br />
.1 ..<br />
.• 1.<br />
••• x<br />
326 OS <strong>System</strong> <strong>Control</strong> <strong>Blocks</strong> (Release 21.1)<br />
TASK CONTROL BLOCK -- MVT<br />
Hex.<br />
Dig. Field Description, Contents, Meaning<br />
Floating point register save area.<br />
Address of the RB for executing program.<br />
Address of the program interrupt element (PIE).<br />
Address of the queue of DEBs.<br />
Address of the task I/O table (TIOT).<br />
Task completion code.<br />
A flag byte field containing indicators used or set<br />
by the ABEND SVC.<br />
A dump has been requested.<br />
A step ABEND has been requested •<br />
Reserved.<br />
<strong>System</strong> completion code in first 12 bits; user<br />
completion code in last 12 bits.<br />
These codes are explained in the manual, IBM<br />
<strong>System</strong>/360 Operating <strong>System</strong>: Messages and Codes,<br />
GC28-6631, under the heading -<strong>System</strong> Completion<br />
Codes.-<br />
Flag byte.<br />
Both TESTRAN and decimal simulator programs being<br />
used on a Model 91 machine.<br />
Suppress takinq checkpoints for this step •<br />
Job step TeB:<br />
This is a graphics foreground job or the graphic job<br />
processor.<br />
This is a 1094 emulator task on a Model 85.<br />
TCBTCPp-Task to be posted, but currently rolled out.<br />
TCBTSTCP - This is a time-shared task under control<br />
of the TEST command processor.<br />
TCBOLTEP - OLTEP functions require clean-up before<br />
abnormal termination can be invoked.<br />
(Reserved bits)<br />
1. If this task is not operating under TSO and SVC<br />
61 has been issued, this field contains the<br />
address of the control Core table for TESTRAN.<br />
2. If this task is operating under TSO and SVC 61<br />
has been issued, this field contains one of the<br />
following:<br />
a.) The address of an SVC information block (if<br />
the task is not a subtask of the TEST<br />
command processor).<br />
b.) The address of the test communication table<br />
(TCOMTAB) in the TEST command processor (if<br />
the task is a subtask of the TEST command<br />
processor).<br />
3. If this task is the Test/TMP task operating under<br />
TSO, and TEST initialization has been executed,<br />
this task contains the address of the test<br />
communication table (TCOMTAB) in the TEST command<br />
processor. In this case, the test communication<br />
table may point to one or more SVC information<br />
blocks.
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