Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### SHOBK

Prolog

Control Block Contents
SHOBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### SHOBK Prolog

     Name       : HCPSHOBK
     Description: Set System Characteristics Data Area
     DSECT      : SHOBK
     Function   : Map resident data area for Set System
                  Characteristics Data in HCPIOD
     Located by :
     Created by : none
     Deleted by : none

#### SHOBK Control Block Content

#### SHOBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      SHOBK          Set System Characteristics Data
                                            Area
    0000    0 Bitstring    1 SHOPSFOR       Order
              ...1 11.1      SHO1DCCW       X'1D' Set System Characteristics
                                            Order
    0001    1 Bitstring    1 SHOFLAGS       Flags
    0002    2 Bitstring    4 SHOCUSUP       Control Unit Types Supported
    0006    6 Bitstring    1 SHOCWSUP       CCW Supported
              1... ....      SHOPREFX       X'80' Prefix Command Supported
              .1.. ....      SHORDTDT       X'40' Read Track Data Supported
              ..1. ....      SHOWTSET       X'20' Write Track Set Supported
              ...1 ....      SHOUWTSE       X'10' Update Write Trackset
                                            Supported
              .... 1...      SHOPAVOL       X'08' Parallel Access Volume
                                            Supported
              .... .1..      SHONULLW       X'04' Nullification Window not
                                            required
    0007    7 Bitstring   55 *              Reserved
    003E   62 Bitstring    1 SHOP1          Part 1
    003F   63 Bitstring    1 SHOP2          Part 2
    0040   64 Bitstring    2 SHOP3          Part 3
              00000042       SHOBKBYL       *-SHOBK Byte length of SHOBK
              00000009       SHOBKDSZ       ((SHOBKBYL+7)/8) Doubleword
                                            length of SHOBK

#### SHOBK Storage Layout

    *** SHOBK - Set System Characteristics Data Area
    *
    *     +------+------+---------------------------+------+------+
    *   0 |:PSFOR|:FLAGS|         SHOCUSUP          |:CWSUP|//////|
    *     +------+------+---------------------------+------+//////|
    *   8 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |/////////////////////////////////////////+------+------+
    *  38 |/////////////////////////////////////////|SHOP1 |SHOP2 |
    *     +-------------+---------------------------+------+------+
    *  40 |   SHOP3     | 42
    *     +-------------+
    *
    *** SHOBK - Set System Characteristics Data Area

#### SHOBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    SHOBKBYL       0040 00000042
    SHOBKDSZ       0040 00000009
    SHOCUSUP       0002
    SHOCWSUP       0006
    SHOFLAGS       0001
    SHONULLW       0006 04
    SHOPAVOL       0006 08
    SHOPREFX       0006 80
    SHOPSFOR       0000
    SHOP1          003E
    SHOP2          003F
    SHOP3          0040
    SHORDTDT       0006 40
    SHOUWTSE       0006 10
    SHOWTSET       0006 20
    SHO1DCCW       0000 1D

This information is based on z/VM V4R3.0. Last updated on 30 Apr 2002 at 17:35:21 EDT.
Copyright IBM Corporation, 1990, 2002