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. |
IJJHDLST
Cross Reference (Contains links to field and bit definitions)
IJJHDLST Prolog
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
IJJHDLST DSECT
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' SHARE OPTION EXCLUSIVE .1.. .... DLDEVFBA X'40' FBA DEVICE ..1. .... DLDLGOT X'20' DLIST GETVISED BY CVH ...1 .... DLWAGOT X'10' WORKAREA GETVISED BY CVH .... 1... DLOPENED X'08' VTOC WAS OPENED .... .1.. DLF4DONE X'04' F4 BITS PROCESSED .... ..1. DLIRIOER X'02' 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
*** 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
(contains links to field and bit definitions)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
Last updated on 12 Aug 1999 at 11:21:33 EDT.
Copyright IBM Corporation, 1990, 1999