ZLXBK

Prolog  

Control Block Contents  
   ZLXBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

ZLXBK Prolog

 NAME       : HCPZLXBK
 DESCRIPTION: LOGO FILE EXTENSION BLOCK
 DSECT      : ZLXBK
 FUNCTION   : Mapping for logo extension area.  Each ZLXBK will
              represent slightly less than a page of storage.
              Contained within the ZLXVARS field will be ZLEBKs
              that are chained in a linked list.
 LOCATED BY : HCPBOZ
 CREATED BY : HCPBOZ   as part of reading logo configuration
              file triggered at system IPL or by a
              REFRESH LOGOINFO command.
 DELETED BY : HCPBOZ if replaced as part of REFRESH LOGO

ZLXBK Control Block Content

ZLXBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      ZLXBK          LOGO FILE EXTENSION BLOCK
0000    0 Signed       4 ZLXNXTEX       Pointer to next extension block
0004    4 Signed       4 ZLXEND         Address of 'end of block'
0008    8 Signed       4 ZLXVARS (0)    List entry portion of table
          00000008       ZLXHLEN        *-ZLXBK Header length
          00000054       ZLXVCNT        (4072-ZLXHLEN)/ZLELEN number of
                                        entries in extension
          00000FC8       ZLXENDBK       ZLXHLEN+(ZLXVCNT*ZLELEN) Size in
                                        bytes
          000001F9       ZLXSIZED       (ZLXENDBK+7)/8 Size in double
                                        words
     This command_line block contains: 1) Header information: a) address of
     next command_line block (if any) b) address of the end of block 2) a
     contiguous list of command_line entries Notes : a command_line entry
     cannot span blocks
0000    0 Signed       4 ZLXNXTCB       Pointer to next command_line
                                        block
0004    4 Signed       4 ZLXCBEND       Address of 'end of block'
0008    8 Signed       4 ZLXCMDS (0)    command_line data portion
          00000000       ZLXCHLEN       *-ZLXTXT Header length
          00000FC8       ZLXBYTSZ       ZLXENDBK Size in bytes

ZLXBK Storage Layout

          
*** ZLXBK - LOGO FILE EXTENSION BLOCK
*
*     +---------------------------+---------------------------+
*   0 |         ZLXNXTEX          |          ZLXEND           |
*     +---------------------------+---------------------------+
*
*** ZLXBK - LOGO FILE EXTENSION BLOCK
          
*** Overlay for ORG in ZLXBK
*
*     +---------------------------+---------------------------+
*   0 |         ZLXNXTCB          |         ZLXCBEND          |
*     +---------------------------+---------------------------+
*
*** Overlay for ORG in ZLXBK

ZLXBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
ZLXBYTSZ       0008 00000FC8
ZLXCBEND       0004
ZLXCHLEN       0008 00000000
ZLXCMDS        0008
ZLXEND         0004
ZLXENDBK       0008 00000FC8
ZLXHLEN        0008 00000008
ZLXNXTCB       0000
ZLXNXTEX       0000
ZLXSIZED       0008 000001F9
ZLXVARS        0008
ZLXVCNT        0008 00000054