Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
TPLBK
Control Block Contents
TPLBK DSECT
Cross Reference (Contains links to field and bit definitions)
TPLBK Prolog
NAME : HCPTPLBK DESCRIPTION: TAPE LABEL CONTROL BLOCK DSECT : TPLBK FUNCTION : THE TAPE LABEL CONTROL BLOCK IS USED TO DESCRIBE THE TAPE LABEL PUT ON TAPE. ONLY ONE TPLBK IS CREATED AND USED DURING I/O PROCESSING TO TAPE. LOCATED BY : TPETPLBK IN HCPTPEBK CREATED BY : HCPTPEIN - DURING INITIALIZATION OF I/O PROCESSING. DELETED BY : HCPTPEND - DURING TERMINATION OF I/O PROCESSING. RELOCATION CONSIDERATIONS : None
TPLBK Control Block Content
TPLBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure TPLBK TAPE LABEL CONTROL BLOCK 0000 0 Character 3 TPLVOL LABEL IDENTIFIER 0003 3 Bitstring 1 * RESERVED FOR IBM USE 0004 4 Signed 2 TPLSEQ VOLUME SEQUENCE NUMBER 0006 6 Signed 2 * RESERVED FOR IBM USE 0008 8 Character 8 TPLID TAPE CREATOR IDENTIFICATION 0010 16 Character 8 TPLCRDT CREATION DATE 0018 24 Character 8 TPLCRTM CREATION TIME 0020 32 Signed 4 TPLZONE TIME ZONE DIFFERENTIAL 0024 36 Signed 4 * RESERVED FOR IBM USE 0028 40 Character 8 TPLPNAME PRODUCT NAME 0030 48 Character 7 TPLPNUM PRODUCT NUMBER 0037 55 Character 1 * RESERVED FOR IBM USE 0038 56 Signed 4 * RESERVED FOR IBM USE 003C 60 Signed 4 * RESERVED FOR IBM USE 0040 64 Signed 4 * RESERVED FOR IBM USE 0044 68 Signed 4 * RESERVED FOR IBM USE 0048 72 Signed 4 * RESERVED FOR IBM USE 004C 76 Signed 4 * RESERVED FOR IBM USE 0000000A TPLSIZE (*-TPLBK+7)/8 SIZE OF TPLBK IN DOUBLEWORDS
TPLBK Storage Layout
*** TPLBK - TAPE LABEL CONTROL BLOCK * * +--------------------+------+-------------+-------------+ * 0 | TPLVOL |//////| TPLSEQ |/////////////| * +--------------------+------+-------------+-------------+ * 8 | TPLID | * +-------------------------------------------------------+ * 10 | TPLCRDT | * +-------------------------------------------------------+ * 18 | TPLCRTM | * +---------------------------+---------------------------+ * 20 | TPLZONE |///////////////////////////| * +---------------------------+---------------------------+ * 28 | TPLPNAME | * +------------------------------------------------+------+ * 30 | TPLPNUM |//////| * +---------------------------+--------------------+------+ * 38 |///////////////////////////|///////////////////////////| * +---------------------------+---------------------------+ * 40 |///////////////////////////|///////////////////////////| * +---------------------------+---------------------------+ * 48 |///////////////////////////|///////////////////////////| * +---------------------------+---------------------------+ * 50 * *** TPLBK - TAPE LABEL CONTROL BLOCK
TPLBK Cross Reference
Symbol Dspl Value -------------- ---- ----- TPLCRDT 0010 TPLCRTM 0018 TPLID 0008 TPLPNAME 0028 TPLPNUM 0030 TPLSEQ 0004 TPLSIZE 004C 0000000A TPLVOL 0000 TPLZONE 0020
Copyright IBM Corporation, 1990, 2011