EVCBK DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      EVCBK          Environment Variable Collection Control Block
0000    0 Dbl-Word     8 EVCLOCK (3)    Environment Variable lock
0018   24 Bitstring    1 EVCTYPE        Flag byte indicates type of
                                        variable
          1... ....      EVCTSYS        X'80' EVCTSYS SYSTEM environment
                                        var
0019   25 Bitstring    1 *              Reserved for IBM use
001A   26 Signed       2 EVCCOUNT       Count of environment variables
                                        defined
001C   28 Signed       4 EVCLIST        Pointer to list of variables of
                                        this type
      The following area contains information that is dependent
      on the type of variable.
0020   32 Dbl-Word     8 EVCMISC (2)    Type-dependent area
             Redefinition for SYSTEM environment variables
0020   32 Signed       4 EVCSYCP        Pointer to list of CP variables
          00000006       EVCSIZE        (*-EVCBK+7)/8 EVCBK size in DW
          00000030       EVCBSIZE       EVCSIZE*8 EVCBK size in bytes
      Constant values.
          000003E8       EVCMAXCT       1000 Max # SYSTEM vars allowed
      Mapping for an environment variable definition.


 EVCENT DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      EVCENT         Environment Variable Collection Control Block
0000    0 Signed       4 EVCENEXT       Pointer to next EVCENT
0004    4 Signed       4 *              Reserved for IBM use
0008    8 Character   63 EVCENAME       Environment variable name
          0000003F       EVCENMAX       *-EVCENAME Max length of name
0047   71 Character    1 EVCENLEN       Actual length of name
0048   72 Character  255 EVCEVAL        Environment variable value
          000000FF       EVCEVMAX       *-EVCEVAL Max length of value
0147  327 Character    1 EVCEVLEN       Actual length of value
          00000029       EVCESZ         (*-EVCENT+7)/8 EVCENT size in DW
          00000148       EVCEBZ         EVCESZ*8 EVCENT size in bytes

          
*** EVCBK - Environment Variable Collection Control Block
*
*     +-------------------------------------------------------+
*   0 |                                                       |
*     =                       EVCLOCK                         =
*     |                                                       |
*     +------+------+-------------+---------------------------+
*  18 |:TYPE |//////|  EVCCOUNT   |         EVCLIST           |
*     +------+------+-------------+---------------------------+
*  20 |                       EVCMISC                         |
*     |                                                       |
*     +-------------------------------------------------------+
*  30
*
*** EVCBK - Environment Variable Collection Control Block
          
*** Overlay for EVCMISC in EVCBK
*
*     +---------------------------+
*  20 |         EVCSYCP           | 24
*     +---------------------------+
*
*** Overlay for EVCMISC in EVCBK
          
*** EVCENT - Environment Variable Collection Control Block
*
*     +---------------------------+---------------------------+
*   0 |         EVCENEXT          |///////////////////////////|
*     +---------------------------+---------------------------+
*   8 |                                                       |
*     =                       EVCENAME                        =
*     |                                                +------+
*  40 |                                                |:ENLEN|
*     +------------------------------------------------+------+
*  48 |                                                       |
*     =                       EVCEVAL                         =
*     |                                                +------+
* 140 |                                                |:EVLEN|
*     +------------------------------------------------+------+
* 148
*
*** EVCENT - Environment Variable Collection Control Block

 
Symbol         Dspl Value
-------------- ---- -----
EVCBSIZE       0020 00000030
EVCCOUNT       001A
EVCEBZ         0147 00000148
EVCENAME       0008
EVCENEXT       0000
EVCENLEN       0047
EVCENMAX       0008 0000003F
EVCESZ         0147 00000029
EVCEVAL        0048
EVCEVLEN       0147
EVCEVMAX       0048 000000FF
EVCLIST        001C
EVCLOCK        0000
EVCMAXCT       0020 000003E8
EVCMISC        0020
EVCSIZE        0020 00000006
EVCSYCP        0020
EVCTSYS        0018 80
EVCTYPE        0018