ISTVMAP

Use ISTVMAP to determine the starting and ending addresses and area size of the following major MVS™ storage areas in a dump:

CSA
Extended CSA
Extended FLPA
Extended maximum possible region
Extended MLPA
Extended PLPA
Extended private region
Extended read/only nucleus
Extended read/write nucleus
Extended SQA
FLPA
Low storage
Maximum possible region
MLPA
PLPA
Private region
Read/only nucleus
Read/write nucleus
SQA

When you cannot find an address in a dump, the starting and ending addresses of major MVS storage areas in the dump will help you determine whether and where that address is in the dump.

Also use ISTVMAP when areas of storage needed to diagnose a VTAM® problem do not appear to be in the dump. Knowing which storage area a given address represents and what was dumped can be helpful in determining why a specific storage address is not in a dump. See ISTVDUMP to determine which storage areas were requested to be dumped when the dump was taken.

The ISTVMAP command can also be issued from the panel interface.

Operands

ASID (asid): The ASID of the address space can be specified to be mapped. ASID may be specified in decimal or hexadecimal format. Enter hexadecimal values in the form X'xx'. ASID should be in the range of 1 to the maximum number of address spaces in the dump.

Syntax


>>-ISTVMAP--+------------------+-------------------------------><
            '-ASID--(--asid--)-'

Additional information

The storage in an MVS system is mapped by the CVT virtual storage address extension, the global data area (GDA), and the local data area (LDA). ISTVMAP uses these areas to produce a map of storage that is unique to the dump being processed. The map does not apply to any other dump.

Some of the ranges in the ISTVMAP output will not be complete if the private region (RGN) of the address space being mapped is not accessible in the dump.

If the ASID parameter is not specified, the ISTVMAP CLIST will use the current ASID (that is, the ASID specified on the IPCS SETDEF command). If that ASID cannot be determined, the ASID from the dump header will be used (the ASID that was current when the dump was taken). If that ASID cannot be determined, VTAM's ASID will be used. If the ASID of VTAM cannot be determined, ASID 0001 will be used.

Sample output

ISTVMAP:

CLIST ISTVMAP STARTED AT 17:34:03.                                           
                                                                              
 (ISTVMAP) MAP OF MAJOR MVS STORAGE AREAS FOR ASID X'29', JOBNAME VTAMCS      
                                                                              
   START      END       SIZE          VIRTUAL STORAGE AREA                    
  --------  --------  --------  --------------------------------              
  0AB00000  7FFFFFFF  75500000  EXTENDED MAXIMUM POSSIBLE REGION              
  0AB00000  7FFFFFFF  75500000  EXTENDED PRIVATE REGION                       
  06A2D000  0AAFFFFF  040D3000  EXTENDED CSA                                  
  06A2C000  06A2CFFF  00001000  EXTENDED MLPA                                 
  06A29000  06A2BFFF  00003000  EXTENDED FLPA                                 
  02C44000  06A28FFF  03DE5000  EXTENDED PLPA                                 
  01AFB000  02C43FFF  01149000  EXTENDED SQA                                  
  01774000  01AFAFFF  00387000  EXTENDED READ/WRITE NUCLEUS
  01000000  01773C4F  00773C50  EXTENDED READ/ONLY NUCLEUS
  ---------------------------16M LINE---------------------------
  00FCF000  00FFFFFF  00031000  READ/ONLY NUCLEUS  
  00FC0000  00FCEE8F  0000EE90  READ/WRITE NUCLEUS    
  00E42000  00FBFFFF  0017E000  SQA                                           
  00BB9000  00E41FFF  00289000  PLPA                                          
  00BB8000  00BB8FFF  00001000  FLPA                                          
  00BAB000  00BB7FFF  0000D000  MLPA                                          
  00800000  00BAAFFF  003AB000  CSA                                           
  00006000  007FFFFF  007FA000  MAXIMUM POSSIBLE REGION
  00006000  007FFFFF  007FA000  PRIVATE REGION                                
  00000000  00005FFF  00006000  LOW STORAGE                                   
                                                                              
 CLIST ISTVMAP ENDED AT 17:34:43. RETURN CODE = 0.