IJJHDLST Back to Index page
 
Prolog 
Control Block Contents 
   IJJHDLST DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  IJJHDLST Prolog Top of page
 
 NAME       : IJJHDLST
 DESCRIPTION: Volume Descriptor List
 DSECT      : IJJHDLST
 FUNCTION   : IJJHDLST describes the fields within the common
              VTOC handler descriptor list and is used in the
              CMS/DOS environment. IJJHDLST is called by the
              IJJHDLST macro.
 
 
  IJJHDLST Control Block Content Top of page
 

 IJJHDLST DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure IJJHDLST Volume Descriptor List 0000 0 Bitstring 1 DLFLAGS PROCESSING FLAGS 1... .... DLSHROPT X'80' DLSHROPT SHARE OPTION EXCLUSIVE .1.. .... DLDEVFBA X'40' DLDEVFBA FBA DEVICE ..1. .... DLDLGOT X'20' DLDLGOT DLIST GETVISED BY CVH ...1 .... DLWAGOT X'10' DLWAGOT WORKAREA GETVISED BY CVH .... 1... DLOPENED X'08' DLOPENED VTOC WAS OPENED .... .1.. DLF4DONE X'04' DLF4DONE F4 BITS PROCESSED .... ..1. DLIRIOER X'02' DLIRIOER ACCEPT IRRECOVERABLE I/O ERROR 0001 1 Bitstring 1 * RESERVED 0002 2 Character 6 DLVOLID VOLUME SERIAL NUMBER 0008 8 Character 2 DLSYSNO (0) SYSTEM LOGICAL UNIT NO. 0008 8 Character 1 DLSYSNO1 FIRST BYTE OF SYS-NUMBER 0009 9 Character 1 DLSYSNO2 SECOND BYTE OF SYS-NUMBER 000A 10 Character 1 * RESERVED 000B 11 Character 5 DLVSTART (0) VTOC START ADDRESS (CKD) 000B 11 Character 1 DLBLKCI BLOCKS PER CI (FBA) 000C 12 Signed 4 DLVSTRTB PBN OF VTOC START (FBA) 0010 16 Bitstring 4 DLVEND VTOC END ADDRESS 0014 20 Address 4 DLWRKA WORKAREA ADDRESS 0018 24 Bitstring 4 DLDEVCAP DEVICE CAPACITY 001C 28 Signed 4 DLVCISZ VTOC CI SIZE (FBA) 0020 32 Address 4 DLCVHADR ADDR OF CVH TOP MODULE 0024 36 Address 4 DLBTRK BLOCKS PER TRACK FOR FBA 0028 40 Address 4 DLCIAREA ADDR OF FBA CI AREA 0030 48 Dbl-Word 8 * (0) 00000030 DLLEN *-IJJHDLST LENGTH 00000006 DLSTDWDS (*-IJJHDLST)/8 DOUBLEWORDS
 
 
  IJJHDLST Storage Layout Top of page
 
          
*** IJJHDLST - Volume Descriptor List
*
*     +------+------+-----------------------------------------+
*   0 |:LAGS |//////|                DLVOLID                  |
*     +------+------+------+------+---------------------------+
*   8 |:YSNO1|:YSNO2|//////|:LKCI |         DLVSTRTB          |
*     +------+------+------+------+---------------------------+
*  10 |          DLVEND           |          DLWRKA           |
*     +---------------------------+---------------------------+
*  18 |         DLDEVCAP          |         DLVCISZ           |
*     +---------------------------+---------------------------+
*  20 |         DLCVHADR          |          DLBTRK           |
*     +---------------------------+---------------------------+
*  28 |         DLCIAREA          |///////////////////////////|
*     +---------------------------+---------------------------+
*  30
*
*** IJJHDLST - Volume Descriptor List
 
 
  IJJHDLST Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
DLBLKCI        000B
DLBTRK         0024
DLCIAREA       0028
DLCVHADR       0020
DLDEVCAP       0018
DLDEVFBA       0000 40
DLDLGOT        0000 20
DLFLAGS        0000
DLF4DONE       0000 04
DLIRIOER       0000 02
DLLEN          0030 00000030
DLOPENED       0000 08
DLSHROPT       0000 80
DLSTDWDS       0030 00000006
DLSYSNO        0008
DLSYSNO1       0008
DLSYSNO2       0009
DLVCISZ        001C
DLVEND         0010
DLVOLID        0002
DLVSTART       000B
DLVSTRTB       000C
DLWAGOT        0000 10
DLWRKA         0014
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 16:01:34 EDT.
Copyright IBM Corporation, 1990, 2022