You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
DATA EVENT CONTROL BLOCK -- QTAM<br />
0(0) LlNEDECB<br />
Always Zero<br />
4 (4) 5 (5) 16 (6)<br />
Reserved Op Code Length of Input Area<br />
8 (8)<br />
12 (C)<br />
16 (10)<br />
20 (14) 21 (15)<br />
Address of DCB<br />
Address of Data in Buffer<br />
Reserved<br />
No. Messages Received Address of Active Entry in Polling List<br />
24 (18) 25 (19) 126 (lA)<br />
Reserved Index, in DEB, to UCB Reserved<br />
28 (lC)<br />
32 (20)<br />
Reserved<br />
Address of Addressing Characters in Terminal Entry<br />
36 (24) 37 (25)<br />
Reserved Address of Polling List<br />
Figure 130. Data Event <strong>Control</strong> Block -- QTAM<br />
Offset<br />
o (0) 4<br />
4 (4) 1<br />
5 (5) . 1<br />
6 (6) .• 2<br />
8 (8) 4<br />
12 (C) 4<br />
16 (10) 4<br />
20 (14) 1<br />
21 (15) • 3<br />
24 (18) 1<br />
25 (19) . 1<br />
26 (lA) •• 2<br />
28 (lC) 4<br />
Bytes and Field<br />
Alignment Name<br />
LINEDECB<br />
Field Description, Contents, Meaning<br />
Always zero.<br />
Reserved.<br />
Operation code for the current segment.<br />
Length of input area for the initial read.<br />
Address of the DCB.<br />
Starting address for data in a buffer.<br />
Reserved.<br />
Number of messages received.<br />
Address of currently active entry in the polling<br />
list.<br />
Reserved.<br />
Index to the UCB address in the DEB.<br />
Reserved.<br />
Reserved.<br />
32 (20) 4 Address of the addressing characters in the terminal<br />
entry.<br />
36 (24) 1 Reserved.<br />
31 (25) • 3 Address of the polling list.<br />
152 OS <strong>System</strong> <strong>Control</strong> <strong>Blocks</strong> (Release 21.1)<br />
39 (27)
Change language