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Continued<br />
132 (84)<br />
Continued<br />
144 (90)<br />
148 (94)<br />
152 (98)<br />
156 (9C)<br />
160 (AO)<br />
DATA CONTROL BLOCK -- ISAM<br />
DCBLEMI3<br />
Direct-Access Address of Last Entry in Third-Level Master Index<br />
137 (89)<br />
DCBNLEV<br />
138 (8A)<br />
DCBFIRSH<br />
No. of Index Levels HHR of First Prime Data Record<br />
141 (8D)<br />
DCBHMASK<br />
142 (8E)<br />
DCBLDT<br />
2301, not 2301 HH of Last Prime Data Track<br />
145 (91)<br />
DCBHIRCM<br />
146 (92) DCBHIROV 1147 (93) DCBHIRSH<br />
DCBHIRPD<br />
Highest R for Overflow Last R of Shared Track<br />
Highest R for Indexes Highest R for Prime Data - ---------------- -<br />
Variable Length Records: Unused<br />
DCBST<br />
Status Indicators<br />
168 (A8)<br />
DCBHIIOV<br />
Highest R for Independent Overflow<br />
176 (BO)<br />
184 (B8)<br />
DCBNTHI<br />
Size of Highest Index<br />
DCBTDC<br />
150 (96)<br />
DCBNCRHI<br />
Tag Deletion Count Bytes Needed for Highest-Level Index<br />
161 (A 1)<br />
169 (A9)<br />
177 (Bl)<br />
DCBRORG3<br />
Count of Access to Overflow Records Other than the First<br />
DCBNREC<br />
No. of Logical Records in Prime Data Area<br />
DCBFTCI<br />
Direct-Access Address of First Track of Cylinder Index<br />
DCBFTMII<br />
Direct-Access Address of First Track of First-Level Master Index<br />
DCBFTHI<br />
Direct-Access Address of First Track of Highest-Level Index<br />
DCBLPDA<br />
Direct-Access Address of Last Prime Data Record in Prime Data Area<br />
Figure 6. Data <strong>Control</strong> Block - ISAM (Part 3 of 4)<br />
64 OS <strong>System</strong> <strong>Control</strong> <strong>Blocks</strong>
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