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Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
ZLXBK
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 | * +---------------------------+---------------------------+ * 8 | | * = ZLXVARS = * | | * +-------------------------------------------------------+ * *** ZLXBK - LOGO FILE EXTENSION BLOCK *** Overlay for ORG in ZLXBK * * +---------------------------+---------------------------+ * 0 | ZLXNXTCB | ZLXCBEND | * +---------------------------+---------------------------+ * 8 | | * = ZLXCMDS = * | | * +-------------------------------------------------------+ * *** Overlay for ORG in ZLXBK
ZLXBK Cross Reference
(contains links to field and bit definitions)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
Last updated on 3 Aug 1999 at 13:50:21 EDT.
Copyright IBM Corporation, 1990, 1999