ACCBK Back to Index page
 
Prolog 
Control Block Contents 
   ACCBK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  ACCBK Prolog Top of page
  
 NAME       : HCPACCBK
 DESCRIPTION: Initial file system access block
 DSECT      : ACCBK
 FUNCTION   : The ACCBK contains information that
              describes what the CP file system's initial
              access order should look like.
 CREATED BY : HCPZPQ
 DELETED BY : HCPZIACI
 RELOCATION CONSIDERATIONS : None
 
 
  ACCBK Control Block Content Top of page
  




 ACCBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      ACCBK          Initial file system access block
0000    0 Signed       2 ACCBKNUM       Maximum number of slots
0002    2 Signed       2 *              Reserved for future IBM use
0004    4 Signed       4 *              Reserved for future IBM use
0008    8 Bitstring    1 ACCBKV (0)     Start of variable length data
0008    8 Character    8 ACCUSRID       Userid for minidisk
0010   16 Signed       2 ACCVDEV        Virtual address of minidisk
0012   18 Bitstring    1 ACCOPTS        Options used with linking
          .1.. ....      ACCBNLNK       X'40' ACCBNLNK Do a DEFINE MDISK
          ..1. ....      ACCBNCAC       X'20' ACCBNCAC Don't do cache
0013   19 Bitstring    1 ACCMODE        Access mode to use (same as
                                        DDEVMODE)
          0000000C       ACCELEN        *-ACCUSRID Length of variable
                                        portion
0008    8 Bitstring  312 ACCSTMTS       Space for this many
          00000028       ACCSIZED       (*-ACCBK+7)/8 Length of area in
                                        d-words
 
 
  ACCBK Storage Layout Top of page
  
          
*** ACCBK - Initial file system access block
*
*     +-------------+-------------+---------------------------+
*   0 |  ACCBKNUM   |/////////////|///////////////////////////|
*     +-------------+-------------+---------------------------+
*   8 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*
*** ACCBK - Initial file system access block
          
*** Overlay for ACCBKV in ACCBK
*
*     +-------------------------------------------------------+
*   8 |                       ACCUSRID                        |
*     +-------------+------+------+---------------------------+
*  10 |  ACCVDEV    |:OPTS |:MODE | 14
*     +-------------+------+------+
*
*** Overlay for ACCBKV in ACCBK
          
*** Overlay for ACCBKV in ACCBK
*
*     +-------------------------------------------------------+
*   8 |                                                       |
*     =                       ACCSTMTS                        =
*     |                                                       |
*     +-------------------------------------------------------+
* 140
*
*** Overlay for ACCBKV in ACCBK
 
 
  ACCBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
ACCBKNUM       0000
ACCBKV         0008
ACCBNCAC       0012 20
ACCBNLNK       0012 40
ACCELEN        0013 0000000C
ACCMODE        0013
ACCOPTS        0012
ACCSIZED       0008 00000028
ACCSTMTS       0008
ACCUSRID       0008
ACCVDEV        0010
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:47:00 EDT.
Copyright IBM Corporation, 1990, 2022