CNNBK Back to Index page
 
Prolog 
Control Block Contents 
   CNNBK 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.


  CNNBK Prolog Top of page
  
 NAME       : HCPCNNBK
 DESCRIPTION: Connectivity (aka ISFC) address space
              specific control block
 DSECT      : CNNBK
 FUNCTION   : Contains information used in managing
              (allocation and re-organization of) a
              Connectivity address space.
 LOCATED BY : ASCTYPTR field of ASCBK points to a CAABK.  This
              control block starts at CAAFSI (function specific
              information) section of the CAABK.
 CREATED BY : HCPASMCR, when creating a Connectivity address space
 DELETED BY : Once created, never deleted.
 SERIALIZED :
 RELOCATION CONSIDERATIONS : None
 
 
  CNNBK Control Block Content Top of page
  




 CNNBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      CNNBK          Connectivity (aka ISFC) address space
0000    0 Bitstring    1 CNNINDEX       Index of the i-ASIT table entry
                                        that describes address space
0001    1 Bitstring    1 * (3)          Reserved for IBM use
0004    4 Signed       4 * (3)          Reserved for IBM use
          00000002       CNNSIZE        (*-CNNBK+7)/8 Size, in
                                        doublewords, of CNNBK
 
 
  CNNBK Storage Layout Top of page
  
          
*** CNNBK - Connectivity (aka ISFC) address space
*
*     +------+--------------------+---------------------------+
*   0 |:INDEX|////////////////////|///////////////////////////|
*     +------+--------------------+///////////////////////////|
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  10
*
*** CNNBK - Connectivity (aka ISFC) address space
 
 
  CNNBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
CNNINDEX       0000
CNNSIZE        0004 00000002
 
This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:27:21 EDT.
Copyright IBM Corporation, 1990, 2020