TCAT

Prolog  

Control Block Contents  
   TCAT DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

TCAT Control Block Content

TCAT DSECT

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       TCCBLMIN       12 Min value of TCWTCCBL (TCWBK)
          000000F4       TCCBLMAX       244 Max value of TCWTCCBL (TCWBK)
          00000108       TCCBMXSZ       TCCBLMAX+20 Max byte size of TCCB
          00000021       TCCBMXDW       (TCCBMXSZ+7)/8 Max dword size of
                                        TCCB

TCAT Storage Layout

          
*** TCAT - FCX Transport Command Control Block
*
*     +---------------------------+---------------------------+
*   0 |         TCATW0RS          |         TCATCNT           |
*     +---------------------------+---------------------------+
*   8 |         TCATRCNT          | C
*     +---------------------------+
*
*** TCAT - FCX Transport Command Control Block

TCAT Cross Reference

Symbol         Dspl Value
-------------- ---- -----
TCATCNT        0004
TCATRCNT       0008
TCATW0RS       0000
TCCBLMAX       0008 000000F4
TCCBLMIN       0008 0000000C
TCCBMXDW       0008 00000021
TCCBMXSZ       0008 00000108