TCAT Back to Index page
 
Prolog 
Control Block Contents 
   TCAT 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.

 
  TCAT Control Block Content Top of page
  




 TCAT DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      TCAT           FCX Transport Command Control Block
0000    0 Bitstring    4 TCATW0RS       Reserved for IBM use
0004    4 Signed       4 TCATCNT        Transport Count (unsigned) Or
                                        Write count for bidirectional
                                        data transfer
0008    8 Signed       4 TCATRCNT       Read count (only included in TCAT
                                        for bidirectional data transfer)
          0000000C       TCATBSZ        *-TCAT Length of TCA trailer
          000000F0       TCAMAX         240
          00000004       TCWLMIN        TCATCNT-TCAT Min TCWTCCBL
                                        (TCWW1B1)
          000000F4       TCWLMAX        TCAMAX+TCWLMIN Max TCWTCCBL
                                        (TCWW1B1)
          0000000C       TCALMIN        (TCADCW-TCASAC)+(TCATCNT-TCAT)
                                        Min TCALEN
          000000FC       TCALMAX        TCAMAX+TCALMIN Max TCALEN
          0000010C       TCCBMXSZ       TCCBEND-TCCBK Max byte size of
                                        TCCB
          00000022       TCCBMXDW       (TCCBMXSZ+7)/8 Max dword size of
                                        TCCB
 
 
  TCAT Storage Layout Top of page
  
          
*** TCAT - FCX Transport Command Control Block
*
*     +---------------------------+---------------------------+
*   0 |         TCATW0RS          |         TCATCNT           |
*     +---------------------------+---------------------------+
*   8 |         TCATRCNT          | C
*     +---------------------------+
*
*** TCAT - FCX Transport Command Control Block
 
 
  TCAT Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
TCALMAX        0008 000000FC
TCALMIN        0008 0000000C
TCAMAX         0008 000000F0
TCATBSZ        0008 0000000C
TCATCNT        0004
TCATRCNT       0008
TCATW0RS       0000
TCCBMXDW       0008 00000022
TCCBMXSZ       0008 0000010C
TCWLMAX        0008 000000F4
TCWLMIN        0008 00000004
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:56:54 EDT.
Copyright IBM Corporation, 1990, 2022