Prints formatted data structures, other contents of memory, or
    RMS display options.  The following commands are available:

        SHOW CALL_FRAME
        SHOW CLUSTER
        SHOW CONNECTIONS
        SHOW CPU
        SHOW CRASH
        SHOW DEVICE
        SHOW EXECUTIVE
        SHOW HEADER
        SHOW LOCK
        SHOW PAGE_TABLE
        SHOW PFN_DATA
        SHOW POOL
        SHOW PORTS
        SHOW PROCESS
        SHOW RESOURCES
        SHOW RMS
        SHOW RSPID
        SHOW SPINLOCKS
        SHOW STACK
        SHOW SUMMARY
        SHOW SYMBOL

Additional information available:

CALL_FRAMECLUSTERCONNECTIONSCPUCRASH
DEVICEEXECUTIVEHEADERLOCKPAGE_TABLE
PFN_DATAPOOLPORTSPROCESSRESOURCESRSPID
RMSSPINLOCKSSTACKSUMMARYSYMBOL

        SHOW CALL_FRAME [starting_address]
                        [/NEXT_FP]

    Displays the locations and contents of the longwords
    representing a CALLG or CALLS procedure call frame.
    The starting address of the call frame is determined from the
    specified starting_address, the NEXT_FP option, or by default.
    The default starting address is the longword contained in the
    SDA current process FP register.

Additional information available:

/NEXT_FP

    Used to follow a chain of successive procedure call frames.
    Displays the next call frame by using the contents of the
    "Saved FP" from the previous displayed call frame as the
    starting address of the next call frame.

        SHOW CLUSTER [/CSID=n] [/SCS]

    Displays a view of the Vaxcluster, or the SCS cluster (with the
    SCS qualifier).  The VAXcluster is composed of VAXprocessor nodes
    actively participating in the management of shared resources.
    The SCS cluster (System Communication Services) is composed of
    all nodes participating in the Systems Communication Architecture
    (SCA) Protocol.  Generally, this is all nodes connected to a SCA
    bus, for example the CI.

Additional information available:

/CSID/SCS

    Displays cluster information on a particular VAXcluster member
    node which is specified by its cluster system id.

    Displays a view of the cluster as seen by the system
    communications services (SCS).

        SHOW CONNECTIONS [/ADDRESS=n]

    Displays all active connection descriptor tables (CDTs). A CDT
    describes the connection between two SCS processes.

Additional information available:

/ADDRESS

    Displays a connection descriptor table (CDT)
    specified by its address.

        SHOW CPU [cpu_id]

    Displays information about the state of a CPU at the time of the
    system failure.  The CPU is specified by its hexadecimal CPU ID
    number (a value between 00 and 1F), or by default.  The default CPU
    is the "SDA current CPU".  The information displayed includes the
    reason for the BUGCHECK exception, the currently executing process,
    the current IPL, the contents of all the CPU registers, and any
    spinlocks that the CPU owns.

    SHOW CPU performs an implicit SET CPU command.  The "SDA current
    CPU" will change to the CPU displayed by the SHOW CPU command.
    The implicit SET CPU command also changes SDA process context.
    The "SDA current process" will change to the current process on the
    new "SDA current CPU".  If there is no current process on the new
    "SDA current CPU", then the "SDA current process" will be undefined,
    and no process context information will be available until SDA process
    context is set to a specific process.  Type HELP PROCESS_CONTEXT
    for specific information about the "SDA current process".  Type
    HELP CPU_CONTEXT for specific information about the "SDA current CPU".

    Note:   SHOW CPU is only valid when analyzing a crash dump.  It is not
            a valid command when analyzing the running system, because
            all the CPU-specific information may not be available.

        SHOW CRASH

    Displays information about the state of the system at the time of
    the system failure.  This information includes the time of the system
    failure, the version of the operating system that was running, the
    CPUs that were active and available in the system, a summary of the
    BUGCHECK exception messages for all CPUs in the system, and
    CPU-specific information about each active CPU in the system.
    The CPU-specific information includes the reason for the BUGCHECK
    exception, the currently executing process, the current IPL, the
    contents of all the CPU registers, and any spinlocks that the CPU owns.

    SHOW CRASH performs an implicit SET CPU command.  The new "SDA current
    CPU" is the CPU that induced the system failure.  The implicit SET CPU
    command also changes SDA process context.  The new "SDA current process"
    is the process that was currently executing on the CPU that induced the
    system failure.  If there was no process currently executing on the
    CPU that induced the system failure, then the "SDA current process" is
    undefined, and no process context information will be available until
    SDA process context is set to a specific process.

    Type HELP PROCESS_CONTEXT for specific information about the
    "SDA current process".  Type HELP CPU_CONTEXT for specific
    information about the "SDA current CPU".

    Note:   SHOW CRASH shows only the system-wide information when
            analyzing the running system, because all the CPU-specific
            information may not be available.

        SHOW DEVICE [name] [/ADDRESS=n]

    Displays the I/O data structures associated with a device.
    The device name can be a generic name (DB for example), which shows
    all I/O structures associated with that device type; it can be a
    specific name (DBA1 for example), which shows all I/O structures
    associated with that particular device; or it can be omitted, which
    shows all the I/O structures for all devices in the system.

Additional information available:

/ADDRESS

    Displays the I/O data structures associated with the device
    which is specified by its unit control block (UCB) address.

        SHOW EXECUTIVE

    Displays the executive loaded images, their starting and ending
    virtual addresses, and their sizes.

        SHOW HEADER

    Displays the header of the dump file.

        SHOW LOCK [lockid] [/ALL]

    Displays lock data structures.  Specify the lockid to display
    the lock identified by particular lockid.

Additional information available:

/ALL

    Displays all the lock data structures in the system.

        SHOW PAGE_TABLE [range] [/qualifier]

    Displays the contents of the system page table and the global page
    table.  You can display a range of page table entries or the entire
    system page table.

    The range is a range of virtual addresses for which SDA is to display
    page table entries.  You can specify a range as two addresses separ-
    ated by a colon (:), or as an address and a length, in bytes, separ-
    ated by a semicolon (;).

Additional information available:

/ALL/GLOBAL/SYSTEM

    Lists both the global and system page tables.  This is the
    default qualifier.

    Lists the global page table.

    Lists the system page table.

        SHOW PFN_DATA [pfn] [/qualifier...]

    Displays a listing of the free, modified, and bad page
    lists as well as the entire PFN database.

    If the pfn is specified, SDA displays the information
    associated with that page frame number.

Additional information available:

/ALL/BAD/FREE/MODIFIED/SYSTEM

    Displays the free page list, modified page list, and bad page list as
    as well as the entire PFN database.  This qualifier is the default.

    Displays the bad page list.

    Displays the free page list.

    Displays the modified page list.

    Displays the PFN database.  The information is ordered by
    page frame number, starting at PFN zero.

        SHOW POOL [range]
                  [/qualifier...]

    Displays the contents of the lookaside (SRP, IRP, and LRP)
    pools, the nonpaged dynamic storage pool, and the paged dynamic storage
    pool.  You can display part or all of each pool.  If no range or
    qualifiers are specified, the default is SHOW POOL/ALL.

    The range is a range of virtual addresses within a pool that you want
    to display. You can specify a range as two addresses separated by a
    colon (:), or as an address and a length, in bytes, separated by a
    semicolon (;).

Additional information available:

/IRP/NONPAGED/PAGED/ALL/FREE/HEADER
/LRP/SRP/SUMMARY/TYPE

    Displays the contents of the IRP lookaside list.

    Displays all the contents of nonpaged pool except the IRP list.

    Displays the contents of paged pool.

    Displays the contents of all of memory; this is the default.

    Displays the lookaside,paged, and nonpaged pools and shows
    the blocks that are currently available to the system.

    Displays only the first 16 longwords of each block within pool.

    Displays the pool of long I/O request packets.  Formats all
    blocks currently allocated (in use) within this pool.

    Displays the pool of short I/O request packets.  Formats all
    blocks currently allocated (in use) within this pool.

    Displays a summary of the pools or portions of pool specified by
    the above qualifiers.  This qualifier shows the different types of
    blocks present, lists the total number of each, and shows,
    in decimal, the number of bytes in each block.

    Displays the blocks within pool that are of the specified type.

        SHOW PORTS [/ADDRESS=n][/NODE=name]

    Displays the port independent portion of the port descriptor table
    (PDT), particularly the list of system communication services
    (SCS) entry addresses.

Additional information available:

/ADDRESS/NODE

    Displays the port descriptor table (PDT) specified by the address.
    For PE ports the Port block and Virtual Circuit Blocks are also
    shown.

    Requires /ADDRESS qualifier.  Shows only the Virtual Circuit Block
    associated with the specifed node.

        SHOW PROCESS [name] [/qualifier...]

    Displays the software and hardware context of any process in the
    balance set, and performs an implicit SET PROCESS command.  If the
    process specified is current on some CPU, SDA also performs an
    implicit SET CPU command.  Type HELP PROCESS_CONTEXT for specific
    information about the "SDA current process".  Type HELP CPU_CONTEXT
    for specific information about the "SDA current CPU".

    If no options are given, the PCB of the "SDA current process" is printed
    by default.  If the process name is specified as "ALL", then information
    is shown for all processes that exist in the system.

    The process name must be a quoted string if it contains characters other
    than capital letters, numbers, dollar signs ($), or underscores (_).
    The maximum size of the process name is 15 characters.

Additional information available:

/ALL/CHANNEL/INDEX/LOCK/PAGE_TABLES/PCB
/PHD/PROCESS_SECTION_TABLE/REGISTERS/RMS
/SYSTEM/WORKING_SET_LIST

    This qualifier selects all other qualifiers available with this
    command. Thus, the maximum amount of information for the specified
    process or processes is displayed.

    Displays the I/O channels assigned to the process, the address of the
    window control block associated with that channel, and the specifica-
    tion of the file or device associated with the channel.

    Displays the software and hardware context of the process which is
    specified by the index of the software PCB into the system's PCB
    vector.  Alternately,  this value could be the process identifica-
    tion ( PID or EPID ), from which SDA extracts the correct index.

    Displays the locks owned by the current process.

    Displays the page tables of the program and control regions.  The
    range is a range of virtual addresses within a pool that you want
    to display. You can specify a range as two addresses separated by
    a colon (:), or as an address and a length, in bytes, separated by
    a semicolon (;).

    An accepted abbreviation is /PPT.

    Produces a list of the data contained in the software
    process control block (PCB).  The CPU ID is displayed
    as part of the process state if the process is current
    on some CPU (e.g. CUR 03 for the current process on CPU 03).
    This qualifier is the default.

    Lists information included in the process header.

    Lists the information contained in the process section table.

    An accepted abbreviation is /PST.

    Lists the saved hardware context of the process.  If the process is
    the current process at the time of the system failure, the active
    registers are also displayed.

    Displays the RMS control blocks specified by the option-spec or by the
    last SET RMS command.  If the option-spec is specified, it is valid for
    only that command and has no effect on the options selected by the
    last SET RMS command.  See the SET RMS command for the format of the
    option-spec. The default option-spec is to display all RMS structures.

    Displays the system process control block (PCB).

    Displays the working set list for the process.

    An accepted abbreviation is /WSL.

        SHOW RESOURCES [/qualifier]

    Displays resource data structures.

Additional information available:

/ALL/LOCKID

    Displays all resources in the system.

    This qualifier is the default.

    Displays the resource data associated with the lock whose lockid
    is n.

        SHOW RSPID [/CONNECTION=n]

    Displays all entries in the response-id descriptor table which are
    in use.  The VMS System Communication Services (SCS) provide response-
    ids (RSPIDs) as a mechanism for matching request completion mes-
    sages to the original requests.  Generally, the original request
    is represented by a class driver request packet (CDRP).

Additional information available:

/CONNECTION

    Displays all entries in the response-id descriptor table which
    are associated with this connection descriptor table (CDT).

        SHOW RMS

    Displays the RMS display options currently selected by the SET RMS
    command (only applies to the SHOW PROCESS/RMS command).

        SHOW SPINLOCKS [name] [/qualifier...]

    Displays the multiprocessing synchronization data structures.
    Specify a name to display a particular synchronization structure.

Additional information available:

/ADDRESS/BRIEF/DYNAMIC/FULL/INDEX/OWNED/STATIC

    Display only the lock structure at the specified address.

    Format the displayed spinlocks into a compacted form.

    Display only the dynamic system spinlocks. These spinlocks
    coordinate multiprocessor activity throughout the I/O subsystems.

    Display additional information about the specified spinlocks
    including the access histories.

    Display only the system static spinlock of the specified index.

    Display only those spinlocks which are owned.

    Display only the system static spinlocks. These spinlocks
    coordinate multiprocessor activity central to the processors.

        SHOW STACK [range]
                   [/qualifier...]

    Displays the location and contents of the four process stacks and
    the interrupt stack of the "SDA current CPU".

    You can express the range of memory locations you want to display as
    two locations separated by a colon (:), or as a location and a length,
    in bytes, separated by a semicolon (;).

    If no options are specified, the current operating stack is displayed.

Additional information available:

/ALL/EXECUTIVE/INTERRUPT/KERNEL/SUPERVISOR
/USER

    Displays the location and contents of the four process stacks and
    the interrupt stack for the "SDA current CPU".

    Displays the executive mode stack for the current process.

    Displays the interrupt mode stack for the "SDA current CPU".

    Displays the kernel mode stack for the current process.

    Displays the supervisor mode stack for the current process.

    Displays the user mode stack for the current process.

        SHOW SUMMARY [/IMAGE]

    Displays a list of all processes in the system at the time of
    the system crash.  The CPU ID is displayed as part of the process
    state for processes that are current on some CPU (e.g. CUR 03
    for the current process on CPU 03).

Additional information available:

/IMAGE

    Displays the name of the image being run by each process, if
    available.

        SHOW SYMBOL name [/ALL]

    Displays the value of the specified system symbol
    and the contents of that memory location (if possible).

Additional information available:

/ALL

    Displays information on all the symbols that start with the
    string you specified in the command parameter and are defined
    in the SDA symbol table.