Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of z/VM.

MONSK

Prolog  

Control Block Contents  
   MONSK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  


MONSK Prolog

 NAME       : HCPMONSK
 DESCRIPTION: Monitor SEEKs Mapping
 DSECT      : MONSK
 FUNCTION   : Map the data needed for monitoring SEEK CCWs
 LOCATED BY : None
 CREATED BY : Dynamically created when needed.
 DELETED BY : Dynamically deleted when 'using' task is finished.
 SERIALIZED : None
 Notes      : This control block is bilingual.  The fields within it can
              be referenced in either ASSEMBLER or PLAS modules.
 Notes      : The fields in this control block are used for FBA
              devices as well as CKD/ECKD devices.  For FBA
              devices a LOCATE is considered a 'SEEK', and
              cylinder values are calculated from block numbers.

 

MONSK Control Block Content


MONSK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      MONSK          Monitor SEEKs Mapping
0000    0 Signed       4 MONPOSCT       Access arm positioning count
          .... ...1      MONPOS1        1 Indicate 1 ccw causing arm
                                        movement
0004    4 Signed       4 MONPOSSM       Sum of arm motion
          .... ....      MONPOSM0       0 Indicate 0 arm motion summation
0008    8 Signed       2 MONSCYL        1st 'SEEK' address in chan prog
000A   10 Signed       2 MONECYL        Last 'SEEK' address in chan prog
000C   12 Signed       2 MONHEAD        Head number
000E   14 Bitstring    1 MONIFLG        Information flag
          .... ..1.      MONDPOSD       X'02' Monitor SEEK data is valid
          .... ...1      MONDWRIT       X'01' Chan prog has WRITE CCWs
000F   15 Bitstring    1 *              Reserved for IBM use
          00000002       MONSKSZ        ((*-MONSK)+7)/8 MONSK size in
                                        double words
          .... ....      MONCYL0        X'00' Cylinder 0 equate

 

MONSK Storage Layout

          
*** MONSK - Monitor SEEKs Mapping
*
*     +---------------------------+---------------------------+
*   0 |         MONPOSCT          |         MONPOSSM          |
*     +-------------+-------------+-------------+------+------+
*   8 |  MONSCYL    |  MONECYL    |  MONHEAD    |:IFLG |//////|
*     +-------------+-------------+-------------+------+------+
*  10
*
*** MONSK - Monitor SEEKs Mapping

 

MONSK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
MONCYL0        000F 00
MONDPOSD       000E 02
MONDWRIT       000E 01
MONECYL        000A
MONHEAD        000C
MONIFLG        000E
MONPOSCT       0000
MONPOSM0       0004 00
MONPOSSM       0004
MONPOS1        0000 01
MONSCYL        0008
MONSKSZ        000F 00000002

This information is based on z/VM V4R1.0.
Last updated on 5 Jun 2001 at 14:26:05 EDT.
Copyright IBM Corporation, 1990, 2001