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Offset<br />
o<br />
4<br />
6<br />
8<br />
10<br />
+0<br />
(0) 4<br />
(4) 2<br />
Bytes and Field<br />
Alignment Name<br />
(6) •• 2<br />
(8) 2<br />
(A) •• 2<br />
4<br />
TCTPLEXT<br />
Byte 1<br />
Bytes 2-4<br />
TCTSZLKP<br />
TCTOCBTD<br />
TCTIOTSO<br />
TCTDCBLE<br />
TIMING CONTROL TABLE<br />
Field Description, Contents, Meaning<br />
TCT I/O Tal:le<br />
The TCT I/O table is composed of the TCT I/O lookup<br />
table and the TCT I/O counter table. The TCT I/O<br />
table is not necessarily contiguous to the TCT: the<br />
TCTIOTBL field of the TCT points to it.<br />
TCT I/O Lockup Table<br />
Tne TcT I/O lookup tao.Le includes a DO lookup table<br />
entry for each DD entry in the TIOT.<br />
Subpool and TCT I/O tatle size.<br />
Subpool in which the TCT I/O table resides.<br />
Size in bytes of the TCT I/O table •<br />
Number of device entries in TCT I/O counter table<br />
times 8.<br />
Reserved.<br />
DD Lookup Table Entry<br />
The DD lookup table entries are referenced by the<br />
system management facilities option code to enter the<br />
TCT I/O counter table at the DD entry containing the<br />
device entry for the accessed device.<br />
Offset from the TIOT origin to the TIOELNGH field in<br />
the TIOT entry for the OD statement associated with<br />
the accessed data set.<br />
Offset froro the TCT I/O table origin to the DO entry,<br />
within the TCT I/O counter table, associated with the<br />
accessed data set.<br />
Note: Fields TCTDCBTD and TCTIOTSD repeat for each<br />
DD entry in the TIOT.<br />
End of the DD Lookup Table Entry<br />
Zeros. End of the TCT I/O lookup table.<br />
TCT 339
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