Migrating an Application from OpenVMS VAX to OpenVMS Alpha

• determining the host architecture

• analyzing

• page-size dependencies

• code example
• page-size dependencies
• reallocating memory on an Alpha system

• mapping a single page section
  • page-size dependencies
• mapping into a defined address range
  • code example
  • page-size dependencies
• page-size dependencies
• used to map into expanded virtual address space
  • code example
  • page-size dependencies

• Data
  • ODS-1 format not supported in Alpha
  • ODS-2 format unchanged
  • porting between Digital Fortran for OpenVMS Alpha and Digital Fortran 77 for OpenVMS VAX Systems
  • See also Data alignment
  • shared
    • access
    • unintentional sharing
• Data alignment #1
• Data alignment #2
• Data alignment #3
• Data alignment #4
  • compiler defaults
  • compiler options #1
  • compiler options #2
  • DEC Ada support
  • DEC C support
  • DEC Pascal support
  • exception reporting
  • finding unaligned data
  • global sections
  • incompatibility with translated software
  • performance #1
  • performance #2
  • run-time faults
  • static unaligned data
  • unaligned stack operations
  • VEST qualifiers
• Data-type sizes
  • DEC C portability macros
  • effect on protection of shared data
  • supported by DEC C
• Data types
  • Alpha implementations
  • decimal
  • differences between Digital Fortran for OpenVMS Alpha and Digital Fortran 77 for OpenVMS VAX Systems
  • D_floating #1
  • D_floating #2
  • D_floating #3
  • D_floating #4
    • full precision #1
    • full precision #2
  • G_floating #1
  • G_floating #2
  • G_floating #3
  • H_floating #1
  • H_floating #2
  • H_floating #3
  • H_floating #4
  • H_floating #5
  • H_floating #6
  • H_floating #7
  • IEEE formats
    • little endian
  • packed decimal #1
  • packed decimal #2
  • portability between VAX and Alpha systems
  • supported by Alpha architecture
  • supported by VAX architecture
• Databases
  • same function on Alpha
• DATE-COMPILED statement
  • differences
    • DEC COBOL on OpenVMS Alpha (ex.)
    • VAX COBOL (ex.)
  • listing multiple instances of source line
• DCL (DIGITAL Command Language)
• Debugger
  • Delta/XDelta
  • detecting unaligned data
  • native Alpha
  • OpenVMS
  • System Code Debugger
• Debugging #1
• Debugging #2
  • on Alpha hardware only
  • program structure in relation to
  • restrictions on Alpha systems
  • translated images
• DEC Ada
  • compatibility with VAX Ada
  • language pragma support on Alpha systems
  • system package support on Alpha systems
• DEC C
  • 64-bit capabilities
  • accessing Alpha instructions
  • accessing VAX instructions
  • ANSI conformance
  • atomicity built-ins
  • compatibility modes
  • controlling data alignment
  • data-type-size portability macros
  • establishing dynamic condition handler
  • features specific to Alpha systems
  • specifying floating-point formats
  • /STANDARD qualifier
  • support for pcc mode
  • supported data-types
  • VAX C mode
    • incompatibilities with VAX C
• DEC C for OpenVMS Alpha systems
  • See DEC C
• DEC COBOL
  • command line flags
    • more information
  • command line qualifiers
    • more information
    • new
    • new (tab.)
  • compatibility
    • ACCEPT statement
    • arithmetic operations
    • between DEC COBOL and VAX COBOL
    • calling shareable images
    • COPY statement
    • DBMS support
    • /DEBUG qualifier
    • DECset/LSE
    • diagnostic messages
    • DISPLAY statement
    • Divide-by-zero
    • EXIT PROGRAM Statement
    • Extensions and features
    • file status values
    • Flags
    • key of reference
    • LINAGE statement
    • machine code listing
    • module names
    • MOVE statement
    • Multistream Oracle DBMS DML
    • /NATIONALITY=JAPAN
    • /NATIONALITY=US
    • program structure
    • Qualifiers
    • qualifiers
    • REPLACE statement
    • RMS special registers
    • SEARCH statement
    • sharing common blocks
    • SHR
    • /STANDARD=V3
    • statements, differences in
    • storage of double-precision data
    • system return codes
    • truncation
    • VFU CHANNEL
    • /WARNINGS=ALL
  • current product information
    • location of
  • differences from VAX COBOL
  • features
    • partial list of
• DEC Fortran for OpenVMS Alpha
  • compatibility with DEC Fortran for OpenVMS VAX Systems
    • restrictions
  • compatibility with Digital Fortran 77 for OpenVMS VAX Systems
    • architectural differences
    • command line
    • interpretation differences
    • porting data
  • establishing dynamic condition handler
  • interoperability considerations
  • intrinsic names
    • prefixes
  • LIB$ESTABLISH routine
  • LIB$REVERT routine
  • performing I/O from native and translated images
  • porting data
  • qualifiers not available in Digital Fortran 77 for OpenVMS VAX Systems
  • qualifiers specific to Digital Fortran 77 for OpenVMS VAX Systems
  • support for floating-point data types
• DEC Pascal
  • compatibility with VAX Pascal
  • differences with VAX Pascal
  • establishing dynamic condition handler
  • /G_FLOATING qualifier
  • identifiers included for compatibility
  • LIB$ESTABLISH routine #1
  • LIB$ESTABLISH routine #2
  • new features
  • obsolete features
  • /OLD_VERSION qualifier
  • OVERLAID attribute
  • specifying floating-point format
  • support for data alignment
• DECforms
• DECmigrate
  • See also TIE and Translated image support
  • support for translated images
  • VEST
    • /PRESERVE qualifier
• DECset
• DECthreads
  • .H file support
• DECwindows
• Delta/XDelta Debugger (DELTA/XDELTA)
  • OpenVMS Alpha
  • See also Debugger
• $DELTVA system service
  • freeing allocated memory
    • page-size dependencies
  • page-size dependencies
• Dependencies on other software
  • identifying
• $DEQ system service #1
• $DEQ system service #2
• Design comments
  • unsupported by DEC COBOL
• /DESIGN qualifier
  • unsupported by DEC COBOL
• Device configuration functions
  • in SYSMAN for Alpha
• Device drivers
  • debugging
  • Step 1 interface
  • Step 2 interface
  • user-written #1
  • user-written #2
  • user-written #3
  • written in C
• Diagnostic features
  • compilers
  • VEST
• DIGITAL Command Language
  • See DCL
• Digital Fortran for OpenVMS Alpha
  • compatibility with DEC Fortran for OpenVMS VAX Systems
  • compatibility with Digital Fortran 77 for OpenVMS VAX Systems
    • language features
  • differences with Digital Fortran 77 for OpenVMS VAX Systems
  • LIB$ESTABLISH routine
  • LIB$REVERT routine
• Disk block size
  • relation to page size
• DISPLAY statement
  • differences
• DMA controller
• Double-precision data
  • storage differences
• DPML (Digital Portable Mathematics Library)
  • compatibility
• Dynamic condition handler
  • establishing
• D_floating data type #1
• D_floating data type #2
• D_floating data type #3
• D_floating data type #4

  6459PIDX.HTM
  OSSG Documentation
  22-NOV-1996 13:07:34.59

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