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

OPCTB

Prolog
Control Block Contents
OPCTB DSECT
Storage Layout
Cross Reference

OPCTB Prolog

 NAME       : HCPOPCTB
 DESCRIPTION: OPERATOR CONSOLE DEVICE NUMBER TABLE
 DSECT      : OPCTB
 FUNCTION   : CONTAINS THE DEVICE NUMBERS OF THE OPERATORS PRIMARY
              AND ALTERNATE CONSOLES.
 LOCATED BY : SYSRIOPC is the pointer to the list of potential
              devices to become the operator's console
       SYSRIOPC ---> +-------+
                     | devno | primary console
                     +-------+
                     | devno | alternate console
                     +-------+
                     | devno | alternate console
                     +-------+
                     |   .   |
                     |   .   |
                     |   .   |
                     +-------+
                     |FFFFFFF| end of table
                     +-------+
 CREATED BY : OPCTB is initially part of the system nucleus
              created by the sysgen process.  During system
              initialization, a new OPCTB may be created in
              gotten storage.
 DELETED BY : OPCTB IS PART OF THE SYSTEM NUCLEUS AND NEVER DELETED.

 

OPCTB Control Block Content

OPCTB DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      OPCTB          OPERATOR CONSOLE DEVICE NUMBER
                                        TABLE
     THE FIRST ENTRY IS THE PRIMARY OPERATOR'S CONSOLE, EACH SUCCESSIVE
     ENTRY IS FOR AN ALTERNATE CONSOLE, THE END OF THE TABLE IS INDICATED BY
     X'FFFFFFFF'.
0000    0 Signed       4 OPCDEVNO       Device number of the terminal to
                                        become one of the consoles
0004    4 Bitstring    1 OPCFLAG        Device flags
          1... ....      OPCIC          X'80' Integrated console
                                        indicator
          00000005       OPCLEN         *-OPCTB Length of one entry
          00000005       OPCNEXT        * Next device number in list

 

OPCTB Storage Layout

          
*** OPCTB - OPERATOR CONSOLE DEVICE NUMBER TABLE
*
*     +---------------------------+------+
*   0 |         OPCDEVNO          |:FLAG | 5
*     +---------------------------+------+
*
*** OPCTB - OPERATOR CONSOLE DEVICE NUMBER TABLE

 

OPCTB Cross Reference

Symbol         Dspl Value
-------------- ---- -----
OPCDEVNO       0000
OPCFLAG        0004
OPCIC          0004 80
OPCLEN         0004 00000005
OPCNEXT        0004 00000005

This information is based on z/VM V3R1.0.
Last updated on 29 Mar 2001 at 16:17:05 EDT.
Copyright IBM Corporation, 1990, 2001