DCWBK Back to Index page
 
Prolog 
Control Block Contents 
   DCWBK 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.


  DCWBK Prolog Top of page
 
 NAME       : HCPDCWBK
 DESCRIPTION: Device Command Word (DCW)
 DSECT      : DCWBK
 FUNCTION   : Provide symbolic reference to the fields of a
              Device Command Word (DCW) used by Fibre Channel
              Extensions (FCX)
 LOCATED BY : N/A
 CREATED BY : N/A
 DELETED BY : NA
 
 
  DCWBK Control Block Content Top of page
 

 DCWBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure DCWBK Device Command Word (DCW) 0000 0 Signed 4 DCWCFCT (0) DCW first word - cmd, flag, and control data count 0000 0 Bitstring 1 DCWCMND DCW Command Code 0001 1 Bitstring 1 DCWFLAG DCW Flag byte .1.. .... DCWCC X'40' DCWCC Chain-Command (CC) flag All other bits reserved for IBM use 0002 2 Bitstring 1 DCWW0B2 Reserved for IBM use 0003 3 Bitstring 1 DCWCDCT DCW Control Data Count 0004 4 Signed 4 DCWCNT DCW Data Count (unsigned) 0008 8 Dbl-Word 8 DCWNEXT (0) DCW following current DCW 00000008 DCWBKBSZ (*-DCWBK) DCW byte size 00000001 DCWBKDSZ (*-DCWBK+7)/8 DCW dword size
 
 
  DCWBK Storage Layout Top of page
 
          
*** DCWBK - Device Command Word (DCW)
*
*     +------+------+------+------+---------------------------+
*   0 |:CMND |:FLAG |:W0B2 |:CDCT |          DCWCNT           |
*     +------+------+------+------+---------------------------+
*
*** DCWBK - Device Command Word (DCW)
 
 
  DCWBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
DCWBKBSZ       0008 00000008
DCWBKDSZ       0008 00000001
DCWCC          0001 40
DCWCDCT        0003
DCWCFCT        0000
DCWCMND        0000
DCWCNT         0004
DCWFLAG        0001
DCWNEXT        0008
DCWW0B2        0002
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:48:48 EDT.
Copyright IBM Corporation, 1990, 2022