IBM: PDSSECT

Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only.

PDSSECT

Prolog

Control Block Contents

PDSSECT DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

PDSSECT Prolog
 Name       : PDSSECT
 Description: Directory Table for BPAM Simulation
 DSECT      : PDSSECT
 Function   : PDSSECT describes the fields of the in-storage
              directory that is used in OS simulation of
              BPAM. The in-storage directory is built
              dynamically by DMSSVT from CMS free storage.
              PDSSECT is called by the PDSSECT macro.

PDSSECT Control Block Content


PDSSECT DSECT
Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      PDSSECT        Directory Table for BPAM
                                        Simulation
0000    0 Character    6 PDSIDENT       MACLIB/PDS IDENTIFIER.
          000000D7       PDSFNEW        C'P' CHECK PDSIDENT+3, OLD VS
                                        NEW.
0006    6 Bitstring    1 PDSFLG1        MACLIB/PDS FLAG1.
          0000005B       PDSTEMPF       C'$' PDS DIR. IS IN $PDSTEMP
                                        FILE.
0007    7 Bitstring    1 PDSFLG2        MACLIB/PDS FLAG2.
0008    8 Signed       4 PDSDIRSZ       MACLIB/PDS DIRECTORY SIZE.
000C   12 Signed       4 PDSDIRIT       MACLIB/PDS DIRECTORY ITEM NO.
          00000010       PDSHDRSZ       *-PDSIDENT SIZE OF MACLIB/PDS
                                        HEADER.
0010   16 Signed       4 PDSENTSZ       PDS ENTRY SIZE. AREA TO KEEP
                                        "DMSLIB" MACLIB/PDS FORMAT HEADER
                                        IN.
0014   20 Signed       2 DIRNAME (3)    - MACLIB IDENTIFIER
001A   26 Signed       2 DIRPTR         - ITEM PTR TO START OF DIRECTORY
001C   28 Bitstring    1 TEMPBYTE       - IF $ , THEN PDS IS IN $PDSTEMP
                                        FILE
001D   29 Bitstring    1 CHNGBYTE       - INDICATES UPDATES TO DICT.
001E   30 Signed       2 CORESIZE       - SIZE OF DICTIONARY IN BYTES
0020   32 Signed       2 PDSBLKSI       - BLOCKSIZE OF DICTIONARY
0022   34 Bitstring    1 NEWBLKS (2)    - NO. NEW BLKS ADDED BY STOW
          00000024       PDSLEN         *-PDSSECT LENGTH OF THE PDSSECT
                                        HEADER
0024   36 Signed       4 PDSDIR (0)     - START OF IN CORE DICTIONARY

PDSSECT Storage Layout

*** PDSSECT - Directory Table for BPAM Simulation
*
*     +-----------------------------------------+------+------+
*   0 |                PDSIDENT                 |:FLG1 |:FLG2 |
*     +---------------------------+-------------+------+------+
*   8 |         PDSDIRSZ          |         PDSDIRIT          |
*     +---------------------------+---------------------------+
*  10 |         PDSENTSZ          |         DIRNAME-          |
*     +-------------+-------------+------+------+-------------+
*  18 |   -(014)    |   DIRPTR    |:PBYTE|:GBYTE|  CORESIZE   |
*     +-------------+-------------+------+------+-------------+
*  20 |  PDSBLKSI   |  NEWBLKS    |                           |
*     +-------------+-------------+                           |
*  28 |                                                       |
*     =                        PDSDIR                         =
*     |                                                       |
*     +-------------------------------------------------------+
*
*** PDSSECT - Directory Table for BPAM Simulation