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Device Interface<br />
16 (10)<br />
Common Interface<br />
DATA CONTROL BLOCK -- BDAM<br />
17(11)<br />
DCBKEYLE<br />
DCBREL<br />
Key Length No. of Tracks or <strong>Blocks</strong><br />
20 (14)<br />
DCBBUFNO<br />
21 (15)<br />
DCBBUFCB<br />
No. of Buffers Required Address of Buffer Pool <strong>Control</strong> Block<br />
24 (18)<br />
28 (IC)<br />
Foundation Extension<br />
32 (20) 33 (21)<br />
DCBHIARC, DCBBTFEK, DCBFALN<br />
36 (24)<br />
DCBRECFM<br />
Record Format<br />
26 (1A)<br />
DCBBUFL<br />
DCBDSORG<br />
Buffer Length Data Set Organization<br />
37 (25)<br />
DCBIOBAD<br />
First lOB Address<br />
Reserved<br />
DCBEXLST<br />
Exit List Address<br />
Foundation<br />
·----Sef-o-re---OPE-fij-------·-----------------------------------------------------------------------------------------------------------------------------------------------------------------------<br />
40 (28)<br />
48 (30)<br />
After OPEN<br />
40 (28)<br />
44 (2C)<br />
48 (30)<br />
DCBDDNAM<br />
DD Statement Name<br />
DCBOFLGS<br />
49 (31)<br />
DCBIFLG<br />
50 (32)<br />
DCBMACR<br />
Open Flags lOS Flags Type of I/O Macro Instruction and Options<br />
DCBIFLGS<br />
105 Flags<br />
DCBOFLGS<br />
Open Flags<br />
DCBTlOT<br />
Offset to DD Entry in TIOT<br />
45 (2D)<br />
42 (2A)<br />
Figure 7. Data <strong>Control</strong> Block - BDAM (pa.rt 1 of 2)<br />
76 OS <strong>System</strong> <strong>Control</strong> <strong>Blocks</strong> (Release 21.7)<br />
DCBMACRF<br />
Type of I/O Macro Instruction and Options<br />
DCBDEBAD<br />
Address of DEB<br />
51 (33)<br />
19 !131<br />
31 (IF)<br />
39 (27)
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