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Offset<br />
20 (14) 1<br />
21 (15) • 3<br />
24 (18) 2<br />
26 (lA) •• 2<br />
26 (lA)<br />
27 (lB)<br />
28 (lC) 4<br />
32 (20) 4<br />
36 (24) 1<br />
37 (25) • 3<br />
20 (14)<br />
21 (15)<br />
24 (18)<br />
26 (lA)<br />
26 (lA)<br />
27 (lB)<br />
Bytes and Field<br />
Alignment Name<br />
1<br />
• 3<br />
2<br />
28 (lC) 4<br />
') . . ,<br />
DCBBUFRQ<br />
DCBTRMAD<br />
DCBSOWA<br />
DCBDSORG<br />
Byte 1<br />
xxxx x.xx<br />
• 1 •.<br />
Byte 2<br />
DCBSEGAD<br />
DCBEODAD<br />
DCBRECFM<br />
0000 0010<br />
0000 0100<br />
0000 1000<br />
DCBEXLST<br />
DCBBUFNO<br />
DCBBUFCB<br />
DCBBUFL<br />
DCBDSORG<br />
Byte 1<br />
xxxx .xxx<br />
1 ••.<br />
Byte 2<br />
DCBIOBAD<br />
DATA CONTROL BLOCK -- QTAM<br />
Field Description, Contents, Meaning<br />
PROCESSING PROGRAM MESSAGE QUEUE INTERFACE<br />
Number of cuffers to be filled from the direct access<br />
queue.<br />
Address of a user-provided area in which the terminal<br />
name is stored.<br />
Size of the user-provided work area.<br />
Data set organization.<br />
(Reserved bits)<br />
MQ Problem program message queue •<br />
Reserved.<br />
Address of current segment.<br />
Address of a user-provided routine.<br />
Record Format.<br />
Code'<br />
R Record<br />
G<br />
S<br />
Message<br />
Segment<br />
Address of the exit list.<br />
DIRECT ACCESS STORAGE DEVICE (DASD) MESSAGE QUEUE<br />
INTERFACE, CHECKPOINT DATA SET INTERFACE<br />
Reserved<br />
Address of the terminal table.<br />
Size of the data in the buffer equated to IECKBUFL.<br />
Data set organization.<br />
code<br />
(Reserved bits)<br />
CQ Direct-access message queue<br />
Reserved.<br />
Address of input/output block.<br />
DCB -- QTAM 87
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