TCWBK Back to Index page
 
Prolog 
Control Block Contents 
   TCWBK 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.


  TCWBK Prolog Top of page
  
              Description: FCX Transport Control Word
              DSECT      : TCWBK
              Function   : Provide symbolic reference to the fields of a
              Transport Control Word used by Fibre Channel
              Extensions (FCX)
              Located by : N/A
              Created by : N/A
              Delete By  - N/A
 
 
  TCWBK Control Block Content Top of page
  




 TCWBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      TCWBK          FCX Transport Control Word
0000    0 Bitstring    1 TCWFMT         TCW Format
          .... ....      TCWFMT0        X'00' TCWFMT0 Format 0
0001    1 Bitstring    3 TCWTFLGS (0)   T-Flags
0001    1 Bitstring    1 TCWTFLG0       T-Flag byte 0
          .... .1..      TCWITIDA       X'04' TCWITIDA Input TIDA
          .... ..1.      TCWTTIDA       X'02' TCWTTIDA TCCB TIDA
          .... ...1      TCWOTIDA       X'01' TCWOTIDA Output TIDA
0002    2 Bitstring    1 TCWTFLG1       T-Flag byte 1
          .... ....      TCWTFMT0       X'00' TCWTFMT0 TIDAW Format 0
0003    3 Bitstring    1 TCWTFLG2       T-Flag byte 2
0004    4 Bitstring    1 TCWW1B0        Reserved for IBM use
0005    5 Bitstring    1 TCWW1B1        TCW Word 1 Byte 1
          .... ..1.      TCWREAD        X'02' TCWREAD Read Operation
                                        (Input)
          .... ...1      TCWWRITE       X'01' TCWWRITE Write Operation
                                        (Output)
          1111 11..      TCWTCCBM       X'FC' TCWTCCBM Mask for TCCB byte
                                        length
0006    6 Bitstring    1 TCWW1B2        Reserved for IBM use
0007    7 Bitstring    1 TCWW1B3        Reserved for IBM use
0008    8 Address      8 TCWODATA       64b Outut TIDAL or Data Addr
0010   16 Address      8 TCWIDATA       64b Input TIDAL or Data Addr
0018   24 Address      8 TCWTSBA (0)    64b Transport Status Block Addr
0018   24 Address      4 TCWTSBAH       High word of TCWTSB
001C   28 Address      4 TCWTSBAL       Low word of TCWTSB
0020   32 Address      8 TCWTCCBA (0)   64b Transport Command Control
                                        Block Addr
0020   32 Address      4 TCWTCCBH       High word of TCWTCCBA
0024   36 Address      4 TCWTCCBL       Low word of TCWTCCBA
0028   40 Signed       4 TCWOCNT        Output Byte Count
002C   44 Signed       4 TCWICNT        Input Byte Count
0030   48 Bitstring   12 TCWRSV0        Reserved for IBM use
003C   60 Address      4 TCWINTA        31b Interrogate TCW Addr
          00000040       TCWARBSZ       (*-TCWBK) TCWBK architected byte
                                        size
          00000008       TCWARDSZ       (*-TCWBK+7)/8 TCWBK architected
                                        dword size
 
 
  TCWBK Storage Layout Top of page
  
          
*** TCWBK - FCX Transport Control Word
*
*     +------+------+------+------+------+------+------+------+
*   0 |TCWFMT|:TFLG0|:TFLG1|:TFLG2|:W1B0 |:W1B1 |:W1B2 |:W1B3 |
*     +------+------+------+------+------+------+------+------+
*   8 |                       TCWODATA                        |
*     +-------------------------------------------------------+
*  10 |                       TCWIDATA                        |
*     +---------------------------+---------------------------+
*  18 |         TCWTSBAH          |         TCWTSBAL          |
*     +---------------------------+---------------------------+
*  20 |         TCWTCCBH          |         TCWTCCBL          |
*     +---------------------------+---------------------------+
*  28 |         TCWOCNT           |         TCWICNT           |
*     +---------------------------+---------------------------+
*  30 |                       TCWRSV0                         |
*     |                           +---------------------------+
*  38 |                           |         TCWINTA           |
*     +---------------------------+---------------------------+
*  40
*
*** TCWBK - FCX Transport Control Word
 
 
  TCWBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
TCWARBSZ       003C 00000040
TCWARDSZ       003C 00000008
TCWFMT         0000
TCWFMT0        0000 00
TCWICNT        002C
TCWIDATA       0010
TCWINTA        003C
TCWITIDA       0001 04
TCWOCNT        0028
TCWODATA       0008
TCWOTIDA       0001 01
TCWREAD        0005 02
TCWRSV0        0030
TCWTCCBA       0020
TCWTCCBH       0020
TCWTCCBL       0024
TCWTCCBM       0005 FC
TCWTFLGS       0001
TCWTFLG0       0001
TCWTFLG1       0002
TCWTFLG2       0003
TCWTFMT0       0002 00
TCWTSBA        0018
TCWTSBAH       0018
TCWTSBAL       001C
TCWTTIDA       0001 02
TCWWRITE       0005 01
TCWW1B0        0004
TCWW1B1        0005
TCWW1B2        0006
TCWW1B3        0007
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:57:02 EDT.
Copyright IBM Corporation, 1990, 2022