Compaq Software Product Description ___________________________________________________________________ PRODUCT NAME: Compaq Ada Version 3.5A for OpenVMS Alpha Systems SPD 45.00.07 DESCRIPTION This Software Product Description includes the following two products: o Compaq Ada Version 3.5A for OpenVMS Alpha Systems o Compaq Ada Professional Development Option Version 3.5A for OpenVMS Alpha Systems Note: Compaq Ada was formerly known as DEC Ada. References to DEC Ada in product components should be construed as references to Compaq Ada. Compaq Ada for OpenVMS Alpha is Compaq Computer Corporation's vali- dated implementation of the full ANSI/MIL-STD-1815A-1983 Ada Language. As a result of meeting the ANSI standard, Compaq Ada also conforms to the Federal Information Processing Standard (FIPS-119). The Compaq Ada compiler runs on the OpenVMS Operating System and generates optimized, shareable, and position-independent code. As a native mode OpenVMS Alpha language, Compaq Ada is integrated into the OpenVMS Alpha common language environment. All OpenVMS Alpha sys- tem services and utilities are available to programs written in Com- paq Ada. Compaq Ada supports the OpenVMS Alpha Record Management Ser- vices (RMS) sequential, relative, and indexed file organizations and associated access methods. Compaq Ada programs can invoke modules writ- ten in other OpenVMS languages. Additionally, programs written in other languages can invoke Compaq Ada modules. June 2000 Ada is a powerful, general-purpose language that supports many mod- ern programming practices. The language was designed as the result of a competition sponsored by the United States Department of Defense. The purpose of the competition was to define a language suitable for programming-embedded computer systems. Among the requirements for the language were features that would reduce software costs by increas- ing maintainability, evolvability, reliability, and portability. Ada provides a modular structure for programs by allowing separate com- pilation of program units, as well as providing strong typing, task- ing, exception handling, and other standard language features that must be supported across implementations. Ada provides a number of features from general systems to real-time applications. Ada Language Features o Strong Typing - An object (variable) of a given type may take on only those values that are appropriate to that type, and only cer- tain predefined operations may be performed on data of that type. Because type checking is done at compile time, strong typing en- sures that any errors associated with incorrect data types are de- tected at compile time. o Data Abstraction - Also known as information hiding, data abstrac- tion hides implementation details while providing users with mech- anisms for using the implementation. Abstraction allows the user to focus on important characteristics while ignoring underlying de- tails. Ada provides various levels of abstraction through features such as private data types and packages. o Concurrent Processing - For many applications, it is important that a program be conceived of as a number of parallel, rather than se- rial activities. Most high-order languages provide little or no sup- port for handling such parallel or concurrent activities. They rely on facilities of the host operating system. Ada uses tasks to al- low parallel activities to be programmed directly within the lan- guage. 2 o Separate Compilation - Ada's separate compilation feature allows a programmer to divide a large program into compilation units that may be compiled at different times. When a unit is compiled, the Ada program library manager records information about that unit and other related units. This feature is unlike separate compilation features in other languages, where little information about sep- arately compiled modules is maintained. o Generic Definitions - A generic unit is a template from which spe- cific instances can be made at compile time. In many cases, the logic of an algorithm or a set of operations is independent of the spe- cific type of the values being manipulated. However, in a strongly typed language such as Ada, all types must be defined at compile time. Generic definitions let the user to define a general algo- rithm or set of related operations and then create a specific in- stance of that algorithm or set of operations for each type to which the algorithm or operations must apply. o Exception Handling - In many operations, especially embedded com- puter systems, it is critical that a system be able to recover quickly and efficiently from error conditions. Ada provides the ability to raise and handle exceptions. It includes predefined exceptions and also permits the user to define exceptions. When an exception oc- curs in an Ada program, normal processing is abandoned and control passes to the exception handler. Compaq Ada Components and Special System-Related Features: o Ada compiler fully conforming to ANSI/MIL-STD-1815A-1983. For de- tails see the DEC Ada Language Reference Manual. o Ada program library manager that provides support for programming teams through: - Program libraries that can be shared by many programmers 3 - A powerful search list model for program libraries. This permits the following: * The relationships among program libraries can be changed easily. * Individual programmers can establish different views of program library relationships - Automatic recompilation of obsolete compilation units - The ability to share compiled Ada code either by reference or copy o Compaq Ada supports passive tasking and pragma PASSIVE which can significantly improve the performance of rendezvous in programs. A task rendezvous (consisting of an entry call to a passive task) is accomplished with no context switching overhead. Instead, the accept body is executed in the context of the task making the entry call. o Strongly-typed Compaq Ada bindings that provide interfaces for the following versions of X Windows Toolkit and X Window Systems[TM] and Motif[R] routines: - X Window System Version 11R4 and Motif Version 1.1.3 - X Window System Version 11R5 and Motif Version 1.2 o Compaq Ada implements AI-00866, which permits an 8-bit character set based on ISO standard 8859/1 (commonly known as Latin-1). o Support for the ISO Math Library packages GENERIC_PRIMITIVE_FUNCTIONS and GENERIC_ELEMENTARY_FUNCTIONS. o Support for 64-bit integers and floating point numbers. o Debugging capability provided through the OpenVMS Debugger. High- level, fully symbolic debugging including support for debugging tasking programs, packages and mixed Compaq Ada and non-Ada code. 4 o Integration with OpenVMS Alpha Operating System including: - Conformance to the OpenVMS Calling Standard, which allows Ada code to call and be called by code written in other languages, as well as to call OpenVMS system services and the OpenVMS Run- Time Library - The ability to call OpenVMS Record Management Services (RMS) routines directly - Full access to relative and indexed file capabilities - The ability to handle exceptions from non-Ada code and generate exceptions to be handled by non-Ada code - The ability to handle OpenVMS Asynchronous System Traps (ASTs) - The ability to link with shared images and use shared global sections - The ability to share data with non-Ada code through global variables and psects (common blocks) o System-Dependent Facilities - Different systems vary in such char- acteristics as the size of storage units, memory size, and the small- est and largest integer values supported. Ada provides the predefined package SYSTEM to define system-related constants and to represent system-dependent information. o Compaq Ada provides representation clauses that allow the user to tailor the representation of data to suit a particular system. Compaq Ada provides: - Length clauses that specify the amount of storage associated with a type - Enumeration representation clauses that specify the internal codes for the literals of enumeration types - Record representation clauses that specify the layout of a record type, such as the order, position, and size of record components - Address clauses that specify required addresses in storage for objects, imported subprograms, or single entries 5 o Compaq Ada provides a number of pragmas (compiler directives) that allow various system-related parameters to be set and changed and that control mixed-language programming. o Comprehensive diagnostic messages with references to the DEC Ada Language Reference Manual. This feature is directed at helping the new Compaq Ada user. Compaq Ada Professional Development Option for OpenVMS Alpha Systems: The Compaq Ada Professional Development Option is a separately-licensed option that is available with Compaq Ada on OpenVMS Alpha Systems. The Compaq Ada Professional Development Option includes the following capabilities: o Smart Recompilation-This feature can significantly reduce the number of recompilations that are needed to rebuild a Compaq Ada program after some compilation units change. Smart recompilation enables the compiler to propagate changes quickly through a system, eliminating up to 100% of the usual recompilations. o Program Library File-Block Caching - This feature uses an in-memory cache of file blocks to minimize the actual amount of disk input- output that must be performed. As a result, the elapsed time for compilations is reduced significantly. o Multilevel Program Library Directory Structure-This feature pro- vides a more efficient program library directory structure to improve the performance of access to large program libraries. The Compaq Ada Professional Development Option is designed so that it is compatible with libraries that are created without the Compaq Ada Professional Development Option and libraries created with a previous version of Compaq Ada. Once a program library is created, Compaq Ada programmers do not need to change any of their development pro- cedures to benefit from the Compaq Ada Professional Development Option. 6 HARDWARE REQUIREMENTS Processors Supported: An Alpha system that is capable of running OpenVMS Alpha Version 6.2 or higher Disk Space Requirements (Block Cluster Size = 1): Disk space required for 160,000 blocks installation: (72.1 Mbytes) Disk space required for 91,000 blocks permanent use: (41.2 Mbytes) The installation of Compaq Ada V3.5A on top of (but not saving) V3.4 requires: Disk space required for 120,000 blocks installation: (51.5 Mbytes) Disk space required for 24,000 blocks permanent use: (7.7 Mbytes) These counts refer to the disk space required on the system disk. The sizes are approximate. Actual sizes may vary depending on the user's system environment, configuration, and software options. 7 SOFTWARE REQUIREMENTS Compaq Ada for OpenVMS Alpha Systems o OpenVMS Alpha Operating System Version 6.2-Version 7.2 (SPD 25.01.xx) Compaq Ada Professional Development Option for OpenVMS Alpha requires both: o Compaq Ada for OpenVMS Alpha Systems Version 3.5A o OpenVMS Alpha Operating System Version 6.2-Version 7.2 (SPD 25.01.xx) OPTIONAL SOFTWARE o DECset Release 12.3 for OpenVMS Alpha Systems, which includes: - DIGITAL Language-Sensitive Editor/Source Code Analyzer (LSE/SCA) Version 4.6 for OpenVMS Alpha Systems - DIGITAL Test Manager (DTM) Version 3.9 for OpenVMS Alpha Systems - DIGITAL Performance and Coverage Analyzer (PCA) Version 4.6 for OpenVMS Alpha Systems - DIGITAL Code Management System (CMS) Version 4.0 for OpenVMS Alpha Systems - DIGITAL Module Management System (MMS) Version 3.3 for OpenVMS Alpha Systems For more information on DECset Release 12.3 for OpenVMS Alpha Systems, refer to the Software Product Description (SPD 42.29.xx). 8 GROWTH CONSIDERATIONS The minimum hardware and software requirements for any future version of this product may be different from the requirements for the cur- rent version. Note: A version update represents a complete distribution media replace- ment for the previous release of Compaq Ada. All user-developed source modules that comprise an application must be recompiled and rebuilt using only Compaq Ada software for that version update. Individual com- ponents of Compaq Ada software from the latest version update cannot be used in conjunction with components from a previous version. DISTRIBUTION MEDIA The products described in this SPD are distributed on the OpenVMS Al- pha Software Layered Products Library Package (order number QA-03XAA-H8). Online documentation only is distributed on the OpenVMS Alpha Online Documentation Library (order number QA-4KM8A-G8), and binaries only are distributed on the OpenVMS Alpha Software Layered Products Library (order number QA-4KL8A-A8). These CD-ROMs contain the Compaq Ada and Compaq Ada Professional Develop- ment Option software binaries and online documentation in Bookreader[TM] and POSTSCRIPT[R] format. The Compaq Ada documentation is also available in hard copy, which can be ordered separately (order number QA-09PAA-GZ). Year 2000 Ready This product is Year 2000 Ready. Year 2000 Ready is defined: "Year 2000 Ready" products are defined by Compaq as products capable of accurately processing, providing, and /or receiving date data from, into and between the twentieth and the twenty-first centuries, and the years 1999 and 2000, including leap year calculations, when used in accordance with the associated product documentation and provided that all hardware, firmware and software used in combination with such products properly exchange accurate date data with the products. 9 For additional information visit the DIGITAL brand area on Compaq's Year 2000 Ready Web site located at: http://www.compaq.com/year2000 /. SOFTWARE WARRANTY This software is provided by Compaq with a 90 day conformance warranty in accordance with the Compaq warranty terms applicable to the license purchase. The above information is valid at time of release. Please contact your local Compaq office for the most up-to-date information. ORDERING INFORMATION Compaq Ada for OpenVMS Alpha Systems Software Licenses: Personal Use: QL-056AA-2B Concurrent Use: QL-056AA-3* Unlimited System Use: QL-09PA*-** Software Media: QA-03XAA-H8 Software Documentation: QA-09PAA-GZ Software Product Services: QT-09PA*-** Compaq Ada Professional Development Option for OpenVMS Alpha Systems Software Licenses: Personal Use: QL-0VQAA-2B Concurrent Use: QL-0VQAA-3B Unlimited System Use: QL-0VRA*-** Software Documentation: QA-0VRAA-GZ Software Product Services: QT-0VRA*-** Note: The Software Documentation kit (order number QA-0VRAA-GZ) contains only the Read Before Installation letter and must be ordered (at no cost) with all licenses for Compaq Ada Professional Development Option for OpenVMS Alpha Systems. 10 The Compaq Ada Professional Development Option for OpenVMS Alpha Sys- tems binaries are provided with the Compaq Ada binaries. Purchase of a Compaq Ada Professional Development Option for OpenVMS Alpha Systems license (QL-0V*A*-**) enables use of this capability. * Denotes variant fields. For additional information on available li- censes, services, and media, refer to the appropriate price book. SOFTWARE LICENSING This software is furnished only under a license. For more information about Compaq licensing terms and policies, contact your local Compaq office. License Management Facility Support: This layered product supports the OpenVMS License Management Facility. License units for this product are allocated on an Unlimited System Use plus Personal Use and Concurrent Use basis. Each Personal Use license allows one identified individual to use the layered product. Each Concurrent Use license allows any one individual at a time to use the layered product. For more information on the License Management Facility, refer to the OpenVMS Operating System for VAX and Alpha Software Product Description (SPD 25.01.xx) or the OpenVMS Alpha Operating System documentation. SOFTWARE PRODUCT SERVICES A variety of service options are available from Compaq. For more information, contact your local Compaq office. The previous information is valid at time of release. Please contact your local Compaq office for the most up-to-date information. 11 [TM] Compaq, and the Compaq logo, are registered in the U.S. Patent and Trademark Office. [TM] AlphaServer, AlphaStation, Bookreader, CI, DECset, OpenVMS, and VMS are trademarks of Compaq Computer Corporation. [R] Motif is a registered trademark of The Open Group [TM] X Window System is a trademark of the Massachusetts Institute of Technology. [TM] POSTSCRIPT is a registered trademark of Adobe Sytems Incorporated. © 2000 Compaq Computer Corporation. All rights reserved. 12