CASBK

Prolog  

Control Block Contents  
   CASBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

CASBK Prolog

 NAME       : HCPVEXBK
 DESCRIPTION: Map Contiguous Available Slots
 DSECT      : CASBK
 NOTES      :
              The following describes a CASBK - group of contiguous
              available slots in the current extent.  They are
              located in VEXSPACA or VEXPGACA.

CASBK Control Block Content

CASBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      CASBK          Map Contiguous Available Slots
0000    0 Bitstring    1 CASLEN         Number of slots
0001    1 Bitstring    1 CASNXT         Pointer to next CASBK
0002    2 Signed       2 CASLOC         Starting slot
          00000004       CASSZ          (*-CASBK) Size of one CASBK
          00000010       CASNUM         16 Number of CASBKs in VEXSPACA
                                        or VEXPGACA.

CASBK Storage Layout

          
*** CASBK - Map Contiguous Available Slots
*
*     +------+------+-------------+
*   0 |CASLEN|CASNXT|   CASLOC    | 4
*     +------+------+-------------+
*
*** CASBK - Map Contiguous Available Slots

CASBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
CASLEN         0000
CASLOC         0002
CASNUM         0002 00000010
CASNXT         0001
CASSZ          0002 00000004