NAME       : HCPVNPBK
 DESCRIPTION: HCPVINOP extended parameter list block
 DSECT      : VNPBK
 FUNCTION   : This DSECT maps the extended parameter list
              created by HCPVINOP for HCPVOP.
 LOCATED BY : VOPEXPRM in the VOPBK
 CREATED BY : HCPVINOP when an extended parameter list
              is necessary
 DELETED BY : N/A - assembled into the module invoking
              HCPVINOP
 SERIALIZED : Task ownership
 RELOCATION CONSIDERATIONS : None
 COMMENTS   : None

 VNPBK DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      VNPBK          HCPVINOP extended parameter list block
0000    0 Dbl-Word     8 * (0)
0000    0 Signed       4 VNPEXFLG (0)   Word of parameter flags - an
                                        extension of the flags passed to
                                        HCPVOP in R2.
0000    0 Bitstring    1 VNPEXFB0       Byte 0 of VNPEXFLG
          1... ....      VNPBAUTO       X'80' VNPBAUTO BUFADDR=AUTO was
                                        specified
          .1.. ....      VNPLNFLD       X'40' VNPLNFLD The length to be
                                        fetched or stored is within the
                                        DIAGNOSE parameter list. VNPLENFD
                                        indicates where the length can be
                                        found, and VNPLUNIT specifies the
                                        units in which the length is
                                        specified.
          ..1. ....      VNPMXLEN       X'20' VNPMXLEN The user specified
                                        a maximum length to fetch.
                                        VNPMAXLN specifies where this
                                        length (in DWs) can be found.
0001    1 Bitstring    1 VNPEXFB1       Byte 1 of VNPEXFLG
0002    2 Bitstring    1 VNPEXFB2       Byte 2 of VNPEXFLG
0003    3 Bitstring    1 VNPEXFB3       Byte 3 of VNPEXFLG
0004    4 Bitstring    1 VNPVARST (0)   Start of the variable section of
                                        the VNPBK.
        Information present if LENFIELD was specified on
        HCPVINOP.
0004    4 Signed       4 VNPLFLDP (0)   Start of the information related
                                        to the LENFIELD operand.
0004    4 Signed       4 VNPLENFD       Base and displacement of the
                                        field from which to get the
                                        length to fetch. The field must
                                        be 2 bytes long.
0008    8 Signed       4 VNPLUNIT       Units in which the length to
                                        fetch is expressed.
000C   12 Address      2 VNPMAXLN       Maximum length to fetch, in DWs.
                                        Specified only if VNPMXLEN is on.

          
*** VNPBK - HCPVINOP extended parameter list block
*
*     +------+------+------+------+
*   0 |:EXFB0|:EXFB1|:EXFB2|:EXFB3|
*     +------+------+------+------+
*
*** VNPBK - HCPVINOP extended parameter list block
          
*** Overlay for VNPVARST in VNPBK
*
*                                 +---------------------------+
*   0 ...                       4 |         VNPLENFD          |
*     +---------------------------+-------------+-------------+
*   8 |         VNPLUNIT          |  VNPMAXLN   | E
*     +---------------------------+-------------+
*
*** Overlay for VNPVARST in VNPBK

 
Symbol         Dspl Value
-------------- ---- -----
VNPBAUTO       0000 80
VNPEXFB0       0000
VNPEXFB1       0001
VNPEXFB2       0002
VNPEXFB3       0003
VNPEXFLG       0000
VNPLENFD       0004
VNPLFLDP       0004
VNPLNFLD       0000 40
VNPLUNIT       0008
VNPMAXLN       000C
VNPMXLEN       0000 20
VNPVARST       0004