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Offset<br />
20 (14) 1<br />
21 (15) • 3<br />
24 (18) 1<br />
25 (19) .1<br />
26 (lA) •• 2<br />
28 (lC) 1<br />
29 (lD) • 3<br />
32 (20) 1<br />
DATA CONTROL BLOCK -- TCAM<br />
Bytes and<br />
Alignment<br />
Field<br />
Name Field Description, Contents, Meaning<br />
LINE GROUP INTERFACE<br />
<<br />
DCBBUFIN/DCBBUFOU<br />
xxxx<br />
DCBMH<br />
xxxx<br />
DCBINTVL<br />
DCBPCI<br />
1... (X,)<br />
.1.. (,X)<br />
•. 1. (A,)<br />
••• 1 (,A)<br />
1. •• (N,)<br />
.1.. (,N)<br />
•• 1. (R,)<br />
••• 1 (,R)<br />
DCBDSORG<br />
Byte 0<br />
BYTE 1<br />
.1.. . ...<br />
DCBBUFMA<br />
DCBIOBAD<br />
OCBCPRl<br />
xxxx x •••<br />
.1 ..<br />
•• 1.<br />
..• 1<br />
Number of buffers assigned initially for receiving<br />
operations, for each line in line group.<br />
Number of buffers assigned initially for sending<br />
operations, for each line in the line group.<br />
Address of the message handler for this line group.<br />
Number of seconds of invitation delay.<br />
Program-controlled interruption handling.<br />
Code PC1=<br />
Data set organization.<br />
Reserved.<br />
CODE<br />
TX<br />
106 OS <strong>System</strong> <strong>Control</strong> <strong>Blocks</strong> (Release 21.7)<br />
Maximum number of buffers to be used for data<br />
transfer for each line in this group.<br />
Before OPEN: Address of address vector table (AVT).<br />
After OPEN: Base for addressing lOBs (Base=address<br />
of first lOB minus length of one LCB).<br />
Relative priority to be given to sending and<br />
receiving operations.<br />
Code<br />
(Reserved bits)<br />
R-Receiving has priority_<br />
E-Receiving and sending have equal priority_<br />
S-Sending has priority •
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