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Programming Interface Information:
This page documents intended Programming Interfaces that allow the customer to write programs to obtain the services of z/VM. |
TVISECT
Control Block Contents
TVISECT DSECT
Cross Reference (Contains links to field and bit definitions)
TVISECT Prolog
Name : TVISECT
Description: DMSTVI PLIST - Tape Volume Processing I-face
DSECT : TVISECT
Function : THIS MACRO MAPS THE PLIST THAT IS PASSED TO DMSTVI
WHEN DMSTVI IS CALLED. THE ADDRESS OF THE PLIST
IS IN REGISTER 1 WHEN DMSTVI IS CALLED. TVISECT
is a parameter list that defines the input to a
user supplied DMSTVI module. TVISECT is
generated when the user issues the TVISECT
macro.
Notes : MODULE TYPE is MACRO
PROCESSOR is ASSEMBLER F
TVISECT Control Block Content
TVISECT DSECT
Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure TVISECT DMSTVI PLIST - Tape Volume
Processing I-face
0000 0 Character 8 TVIMOD MODULE NAME FOR SVC 202
0008 8 Character 8 TVIFUNCT CALL FUNCTION KEYWORD
SYSPARM - CALL FOR SYSPARM
PROCESSING
OPEN - CALL FROM OPEN MACRO
VOLIDBAD - TAPE / USER SPECIFIED
VOLIDS DO NOT MATCH
EOV - CALL FOR END OF VOLUME
CLOSE - CALL FROM CLOSE MACRO
THE FOLLOWING FIELDS WILL BE FILLED IN FROM INFORMATION THAT IS STORED
IN THE LABSECT. REFER TO THE LABELDEF COMMAND FOR MORE INFORMATION
ABOUT THESE FIELDS.
0010 16 Character 8 TVIFILE DDNAME
0018 24 Character 17 TVIFID FILE ID (RIGHTMOST 17 CHARACTERS)
0029 41 Character 1 TVISEC SECURITY TYPE
002A 42 Character 6 TVIVOLID VOLUME ID TO BE MOUNTED
0030 48 Character 4 TVIVSEQ VOLUME SEQUENCE NUMBER
0034 52 Character 4 TVIFSEQ FILE SEQUENCE NUMBER
0038 56 Character 4 TVIGENN GENERATION NUMBER
003C 60 Character 2 TVIGENV GENERATION VERSION
003E 62 Character 6 TVICRD CREATION DATE
0044 68 Character 6 TVIEXD EXPIRATION DATE
004A 74 Signed 2 TVISYSPL LENGTH OF SYSPARM STRING
004C 76 Address 4 TVISYSPA ADDRESS OF SYSPARM STRING
0050 80 Character 44 TVIFILID FILE IDENTIFIER
007C 124 Character 8 TVISCRAT SCRATCH | NOSCRATC SCRATCH WAS
(OR WAS NOT) SPECIFIED AS THE
LABELDEF VOLID
THE FOLLOWING FIELDS WILL BE FILLED IN FROM INFORMATION THAT IS STORED
IN THE FCBSECT (SUPPLIED BY THE FILEDEF COMMAND).
0084 132 Character 4 TVICUU VIRTUAL DEVICE ADDRESS (TAP0
THROUGH TAPF) X'180' - X'187',
X'288' - X'28F'
0088 136 Character 8 TVILABEL Filled with tape label type code
0090 144 Bitstring 1 TVIRFMT RECORDING FORMAT
1..1 .... TVIMODE TVIRFMT,1,C'X' Old label for
TVIRFMT
0091 145 Character 4 TVIALT ALTERNATE TAPE DRIVE TAPE ID
0095 149 Character 6 TVIRING RING | NORING - WRITE ENABLE RING
009B 155 Bitstring 1 TVIFLAGS FLAG FOR TVI EXPANSION FIELDS
BIT INDICATORS (MAY BE USED IN COMBINATIONS)
X'00' NO EXPANSION DATA AVAILABLE
X'80' DATA BEING PASSED FROM TAPE SUB-SYS
X'40' - RESERVED -
X'20' - RESERVED -
X'10' - RESERVED -
X'08' - RESERVED -
X'04' - RESERVED -
X'02' - RESERVED -
X'01' EXPANSION DATA FIELDS AVAILABLE
009C 156 Signed 4 TVIBLKCT BLOCK COUNT
-- EXPANSION DATA FIELDS ******************************----
THE FOLLOWING FIELDS WILL BE FILLED IN FROM INFORMATION THAT IS STORED
IN THE APPLICATION PROGRAM DCB BLOCK AT "CLOSE" TIME TO BE MADE
AVAILABLE TO THE TAPE SUBSYSTEM.
IF THE TAPE SUBSYSTEM HAS THESE VALUES AVAILABLE WHEN THE DMSTVI "OPEN"
CALL IS DONE, CMS WILL ACCEPT THESE VALUES AS RETURNED OUTPUTS FOR
SUBSTITUTION INTO THE FCB (FILEDEF), IF THE USER HAS NOT ALREADY
SPECIFIED THEM. THE FCB INFORMATION WILL THEN BE USED TO REPLACE ANY
NON-SPECIFIED DCB ATTRIBUTES DURING THE CMS OPEN PROCESSING, JUST AS IS
DONE FOR STANDARD LABEL TAPE PROCESSING.
00A0 160 Bitstring 1 TVIRECFM FILE RECORD FORMAT
Basic record format bit definitions:
X'80' = Fixed length records RECFM= F
X'40' = Variable length records RECFM= V
X'C0' = Undefined length records RECFM= U
X'20' = ASCII Variable length records RECFM= D
Modifiers which further define records:
X'10' = Blocking being done
X'08' = For Fixed records: Standard size blocks used
For Variable recs: Spanned records used
X'04' = ASA Control characters in use
X'02' = Machine Control characters in use
X'01' = Record Key length specified
00A4 164 Signed 4 TVILRECL FILE LOGICAL RECORD LENGTH
00A8 168 Signed 4 TVIBLKSI FILE BLOCK SIZE
00B0 176 Dbl-Word 8 TVIEND (0) END OF TVISECT
00000016 TVISIZE (*-TVISECT+7)/8 SIZE OF TVISECT
IN DOUBLEWORDS
TVISECT Storage Layout
*** TVISECT - DMSTVI PLIST - Tape Volume Processing I-face
*
* +-------------------------------------------------------+
* 0 | TVIMOD |
* +-------------------------------------------------------+
* 8 | TVIFUNCT |
* +-------------------------------------------------------+
* 10 | TVIFILE |
* +-------------------------------------------------------+
* 18 | |
* = TVIFID =
* | +------+-----------------------------------------+
* 28 | |TVISEC| TVIVOLID |
* +------+------+-------------+---------------------------+
* 30 | TVIVSEQ | TVIFSEQ |
* +---------------------------+-------------+-------------+
* 38 | TVIGENN | TVIGENV | (03E)- |
* +---------------------------+-------------+-------------+
* 40 | -TVICRD | TVIEXD- |
* +-------------+-------------+---------------------------+
* 48 | -(044) | TVISYSPL | TVISYSPA |
* +-------------+-------------+---------------------------+
* 50 | |
* = TVIFILID =
* | +---------------------------+
* | | TVISCRAT- |
* +---------------------------+---------------------------+
* 80 | -(07C) | TVICUU |
* +---------------------------+---------------------------+
* 88 | TVILABEL |
* +------+---------------------------+--------------------+
* 90 |:RFMT | TVIALT | TVIRING- |
* +------+-------------+------+------+--------------------+
* 98 | -(095) |:FLAGS| TVIBLKCT |
* +------+-------------+------+---------------------------+
* A0 |:RECFM|////////////////////| TVILRECL |
* +------+--------------------+---------------------------+
* A8 | TVIBLKSI |///////////////////////////|
* +---------------------------+---------------------------+
*
*** TVISECT - DMSTVI PLIST - Tape Volume Processing I-face
TVISECT Cross Reference
Symbol Dspl Value -------------- ---- ----- TVIALT 0091 TVIBLKCT 009C TVIBLKSI 00A8 TVICRD 003E TVICUU 0084 TVIEND 00B0 TVIEXD 0044 TVIFID 0018 TVIFILE 0010 TVIFILID 0050 TVIFLAGS 009B TVIFSEQ 0034 TVIFUNCT 0008 TVIGENN 0038 TVIGENV 003C TVILABEL 0088 TVILRECL 00A4 TVIMOD 0000 TVIMODE 0090 90 TVIRECFM 00A0 TVIRFMT 0090 TVIRING 0095 TVISCRAT 007C TVISEC 0029 TVISIZE 00B0 00000016 TVISYSPA 004C TVISYSPL 004A TVIVOLID 002A TVIVSEQ 0030
Last updated on 1 May 2002 at 14:33:08 EDT.
Copyright IBM Corporation, 1990, 2002