NAME       : HCPVFCBK
 DESCRIPTION: VIRTUAL FORMS BUFFER CONTROL BLOCK
 DSECT      : VFCBK
 FUNCTION   : CONTAINS THE FORMS CONTROL BUFFER DATA AND CONTROL
              INFORMATION FOR A VIRTUAL SPOOLING DEVICE.
 LOCATED BY : VDSVFC    FIELD OF HCPVDSBK
 CREATED BY : HCPSCB - FOR PROCESSING THE LOADBUF COMMAND
 DELETED BY : HCPDTD - WHEN THE DEVICE IS DETACHED
 RELOCATION CONSIDERATIONS : This control block is relocated as part of a live
              guest relocation (LGR).  The bits and fields that
              need to be relocated are defined in the
              corresponding LGRVFCBK COPY file.  Whenever changes
              are made to this control block, consideration must
              be given to any effects these changes will have on
              a relocation.  If any new fields or bits are
              defined, they may need to be relocated.  If
              existing bits or fields are changed, corresponding
              modifications may be required in the LGR version of
              this control block.  Consider also the effects of
              these changes on a relocation involving a back-level
              release of CP.

 VFCBK DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      VFCBK          VIRTUAL FORMS BUFFER CONTROL BLOCK
0000    0 Character    4 VFCBNAME       FCB'S NAME
0004    4 Bitstring    1 VFCBFLAG       STATUS FLAGS
          1... ....      VFCBEOF        X'80' VFCBEOF END OF FORMS PASSED
                                        ONCE
          .1.. ....      VFCBDIAG       X'40' VFCBDIAG USED IN 'READ
                                        BUFFER' SUPPORT
          ..1. ....      VFCBFCBV       X'20' VFCBFCBV FCB DATA VALID
          ...1 ....      VFCBREP        X'10' VFCBREP FCB DATA HAS JUST
                                        BEEN REPLACED
0005    5 Bitstring    1 VFCBNUM        CHANNEL NUMBER OR SPACE COUNT
0006    6 Signed       2 VFCBPOSN       CURRENT LINE NUMBER
0008    8 Signed       4 VFCBWORK (0)   WORK WORD
0008    8 Bitstring    1 VFCBPRED       THE LAST CCW ISSUED
0009    9 Bitstring    1 * (3)          SPACE
000C   12 Signed       4 VFCBRSV1       RESERVED FOR FUTURE IBM USE
0010   16 Signed       2 VFCBLEN        LENGTH OF FCB DATA
0012   18 Bitstring    1 VFCBINDX       FCB INDEX BYTE VALUE
0013   19 Bitstring    1 *              RESERVED FOR FUTURE IBM USE
0014   20 Character  260 VFCBLOAD       FORMS CONTROL BUFFER DATA
0118  280 Bitstring    1 * (2)          RESERVED FOR FUTURE IBM USE
011A  282 Signed       2 VFCBPGCT       CURRENT PAGE COUNT
011C  284 Character    4 VFCBIBUF       'SENSE INTERMEDIATE BUFFER' INFO
0120  288 Dbl-Word     8 VFCBEND (0)    END OF VFC BUFFER BLOCK
          00000024       VFCBSIZE       (*-VFCBK)/8 BLOCK SIZE IN DBLWDS
0014   20 Character  130 VFCBLOD1       FOR CLEARING: FCB 1ST HALF
0096  150 Character  130 VFCBLOD2       FOR CLEARING: FCB 2ND HALF
0014   20 Bitstring  256 VFCBNDAT       NORMAL FCB DATA
0114  276 Character    1 VFCBENCH       END-OF-FCB FENCE
0115  277 Bitstring    3 *              (UNUSED PORTION OF EXTENDED FCB)
0014   20 Bitstring    1 VFCBFMT        FCB FORMAT INDICATOR
          0000007E       VFCBXTND       X'7E' VFCBXTND EXTENDED FCB
                                        FORMAT
0015   21 Bitstring    1 VFCBFFLG       FCB FLAGS
          ...1 ....      VFCBXDUP       X'10' VFCBXDUP DUPLICATE COPY
                                        ENABLED
          1... ....      VFCBZERO       X'80' VFCBZERO BIT ZERO MUST BE 0
                                        BY DEFINITION
0016   22 Bitstring    1 VFCBCOPY       COPY COUNT
0017   23 Bitstring  256 VFCBXDAT       EXTENDED FCB: ACTUAL FCB DATA
0117  279 Bitstring    1 VFCBEOFF       EXTENDED FCB END-OF-FORMS MARKER
          000000FE       VFCBXEOF       X'FE' VFCBXEOF EXTENDED FCB
                                        END-OF-FORMS CODE
011C  284 Signed       2 VFCBFCBP       CURRENT FCB POINTER
011E  286 Signed       2 VFCBCPGC       CURRENT PAGE COUNTER

          
*** VFCBK - VIRTUAL FORMS BUFFER CONTROL BLOCK
*
*     +---------------------------+------+------+-------------+
*   0 |         VFCBNAME          |:BFLAG|:BNUM |  VFCBPOSN   |
*     +------+--------------------+------+------+-------------+
*   8 |:BPRED|////////////////////|         VFCBRSV1          |
*     +------+------+------+------+---------------------------+
*  10 |  VFCBLEN    |:BINDX|//////|                           |
*     +-------------+------+------+                           |
*  18 |                                                       |
*     =                       VFCBLOAD                        =
*     |                                                       |
*     +-------------+-------------+---------------------------+
* 118 |/////////////|  VFCBPGCT   |         VFCBIBUF          |
*     +-------------+-------------+---------------------------+
*
*** VFCBK - VIRTUAL FORMS BUFFER CONTROL BLOCK
          
*** Overlay for VFCBLOAD in VFCBK
*
*                                 +---------------------------+
*     ...                      14 |                           |
*     +---------------------------+                           |
*  18 |                                                       |
*     =                       VFCBLOD1                        =
*     |                                         +-------------+
*     |                                         |             |
*     +-----------------------------------------+             |
*  98 |                                                       |
*     =                       VFCBLOD2                        =
*     |                                                       |
*     +-------------------------------------------------------+
* 118
*
*** Overlay for VFCBLOAD in VFCBK
          
*** Overlay for VFCBLOAD in VFCBK
*
*                                 +---------------------------+
*     ...                      14 |                           |
*     +---------------------------+                           |
*  18 |                                                       |
*     =                       VFCBNDAT                        =
*     |                           +------+--------------------+
* 110 |                           |:BENCH|////////////////////|
*     +---------------------------+------+--------------------+
* 118
*
*** Overlay for VFCBLOAD in VFCBK
          
*** Overlay for VFCBLOAD in VFCBK
*
*                                 +------+------+------+------+
*  10 ...                      14 |:BFMT |:BFFLG|:BCOPY|      |
*     +---------------------------+------+------+------+      |
*  18 |                                                       |
*     =                       VFCBXDAT                        =
*     |                                                +------+
* 110 |                                                |:BEOFF|
*     +------------------------------------------------+------+
* 118
*
*** Overlay for VFCBLOAD in VFCBK
          
*** Overlay for VFCBIBUF in VFCBK
*
*                                 +-------------+-------------+
* 118 ...                     11C |  VFCBFCBP   |  VFCBCPGC   |
*                                 +-------------+-------------+
* 120
*
*** Overlay for VFCBIBUF in VFCBK

 
Symbol         Dspl Value
-------------- ---- -----
VFCBCOPY       0016
VFCBCPGC       011E
VFCBDIAG       0004 40
VFCBENCH       0114
VFCBEND        0120
VFCBEOF        0004 80
VFCBEOFF       0117
VFCBFCBP       011C
VFCBFCBV       0004 20
VFCBFFLG       0015
VFCBFLAG       0004
VFCBFMT        0014
VFCBIBUF       011C
VFCBINDX       0012
VFCBLEN        0010
VFCBLOAD       0014
VFCBLOD1       0014
VFCBLOD2       0096
VFCBNAME       0000
VFCBNDAT       0014
VFCBNUM        0005
VFCBPGCT       011A
VFCBPOSN       0006
VFCBPRED       0008
VFCBREP        0004 10
VFCBRSV1       000C
VFCBSIZE       0120 00000024
VFCBWORK       0008
VFCBXDAT       0017
VFCBXDUP       0015 10
VFCBXEOF       0117 000000FE
VFCBXTND       0014 0000007E
VFCBZERO       0015 80