KEYSECT

Prolog  

Control Block Contents  
   KEYSECT DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

KEYSECT Prolog

 Name       : KEYSECT
 Description: Disk Key Table DSECT for BDAM Simulation
 DSECT      : KEYSECT
 Function   : KEYSECT defines by key, the key table used for
              I/O in OS simulation of BDAM files. KEYSECT is
              built dynamically from CMS free storage.
              KEYSECT is called by the KEYSECT macro.

KEYSECT Control Block Content

KEYSECT DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      KEYSECT        Disk Key Table DSECT for BDAM
                                        Simulation
0000    0 Signed       4 KEYLNGTH       - KEY LENGTH
0004    4 Signed       4 DATAEND        - ITEM PTR TO LAST DATA ITEM IN
                                        FILE
0008    8 Signed       4 KEYOP (2)      - START OF PLIST FOR KEYS FILE
0010   16 Signed       4 KEYNAME (2)    - NAME OF KEYS FILE
0018   24 Signed       4 KEYTYPE (2)    - FILE TYPE OF KEYS FILE
0020   32 Signed       2 KEYMODE        - FILE MODE OF KEYS FILE
0022   34 Signed       2 *              - RESERVED.
0024   36 Signed       4 KEYTBLAD       - ADDRESS OF KEY TABLE
0028   40 Signed       4 TBLLNGTH       - BYTE SIZE OF KEY TABLE
002C   44 Bitstring    1 KEYFORM        - FORMAT OF KEYS FILE
002D   45 Bitstring    1 KEYCHNG        - RDBUF/WRBUF PLIST FLAG.
          ..1. ....      KEYEXTPL       X'20' EXTENDED PLIST FLAG.
          .... ...1      KEYCHANG       X'01' INDICATES CHANGE IN KEY
                                        TABLE
002E   46 Signed       2 *              - RESERVED.
0030   48 Signed       4 *              - NO. OF BYTES READ
0034   52 Signed       4 KEYTBLNO       - ITEM NO. OF KEY TABLE
0038   56 Signed       4 KEYCOUT        - BLOCKING FACTOR OF KEY TABLE
003C   60 Signed       4 KEYTABLE (0)   - START OF TABLE (ITEM) FULL OF
                                        KEYS
003C   60 Bitstring    4 KEYEOF         EOF MARKER.
0040   64 Signed       2 KEYXTNT1       XTENT AREA IF LE 65535.
0042   66 Character    2 KEYMARK        BDAM KEY INDICATOR.
0044   68 Signed       2 KEYPTR1        PTR TO KEYS IF LE 65535.
0046   70 Signed       2 *              RESERVED.
0048   72 Signed       4 KEYXTNT2       XTENT AREA IF GT 65535.
004C   76 Signed       4 KEYPTR2        PTR TO KEYS IF GT 65535.

KEYSECT Storage Layout

          
*** KEYSECT - Disk Key Table DSECT for BDAM Simulation
*
*     +---------------------------+---------------------------+
*   0 |         KEYLNGTH          |         DATAEND           |
*     +---------------------------+---------------------------+
*   8 |                        KEYOP                          |
*     +-------------------------------------------------------+
*  10 |                       KEYNAME                         |
*     +-------------------------------------------------------+
*  18 |                       KEYTYPE                         |
*     +-------------+-------------+---------------------------+
*  20 |  KEYMODE    |/////////////|         KEYTBLAD          |
*     +-------------+-------------+------+------+-------------+
*  28 |         TBLLNGTH          |:FORM |:CHNG |/////////////|
*     +---------------------------+------+------+-------------+
*  30 |///////////////////////////|         KEYTBLNO          |
*     +---------------------------+---------------------------+
*  38 |         KEYCOUT           |          KEYEOF           |
*     +-------------+-------------+-------------+-------------+
*  40 |  KEYXTNT1   |  KEYMARK    |  KEYPTR1    |/////////////|
*     +-------------+-------------+-------------+-------------+
*  48 |         KEYXTNT2          |         KEYPTR2           |
*     +---------------------------+---------------------------+
*  50
*
*** KEYSECT - Disk Key Table DSECT for BDAM Simulation

KEYSECT Cross Reference

Symbol         Dspl Value
-------------- ---- -----
DATAEND        0004
KEYCHANG       002D 01
KEYCHNG        002D
KEYCOUT        0038
KEYEOF         003C
KEYEXTPL       002D 20
KEYFORM        002C
KEYLNGTH       0000
KEYMARK        0042
KEYMODE        0020
KEYNAME        0010
KEYOP          0008
KEYPTR1        0044
KEYPTR2        004C
KEYTABLE       003C
KEYTBLAD       0024
KEYTBLNO       0034
KEYTYPE        0018
KEYXTNT1       0040
KEYXTNT2       0048
TBLLNGTH       0028