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1.1     ! root        1: .\" Copyright (c) 1980 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)puman0.n    6.2 (Berkeley) 5/7/86
        !             6: .\"
        !             7: .so tmac.p
        !             8: .EH 'PS1:4-%''Berkeley Pascal User\'s Manual'
        !             9: .OH 'Berkeley Pascal User\'s Manual''PS1:4-%'
        !            10: .TL
        !            11: Berkeley Pascal User's Manual
        !            12: .br
        !            13: Version 3.1 \- April 1986
        !            14: .AU
        !            15: William N. Joy\(dd, Susan L. Graham, Charles B. Haley\(dd,
        !            16: Marshall Kirk McKusick, and Peter B. Kessler\(dd
        !            17: .AI
        !            18: Computer Science Division
        !            19: .if n Department of Electrical Engineering
        !            20: .if n and Computer Science
        !            21: .if t Department of Electrical Engineering and Computer Science
        !            22: University of California, Berkeley
        !            23: Berkeley, California  94720
        !            24: ...AI
        !            25: ...MH
        !            26: .AB
        !            27: .FS
        !            28: Copyright 1977, 1979, 1980, 1983
        !            29: W. N. Joy, S. L. Graham, C. B. Haley, M. K. McKusick, P. B. Kessler
        !            30: .FE
        !            31: .FS
        !            32: \(ddAuthor's current addresses:
        !            33: William Joy: Sun Microsystems, 2550 Garcia Ave., Mountain View, CA 94043;
        !            34: Charles Haley: S & B Associates, 1110 Centennial Ave., Piscataway, NJ  08854;
        !            35: Peter Kessler: Xerox Research Park, Palo Alto, CA
        !            36: .FE
        !            37: .PP
        !            38: Berkeley
        !            39: Pascal
        !            40: is designed for interactive instructional use
        !            41: and runs on the \s-2PDP\s0/11 and \s-2VAX\s0/11 computers.
        !            42: Interpretive code is produced,
        !            43: providing fast translation at the expense of slower execution speed.
        !            44: There is also a fully compatible compiler for the \s-2VAX\s0/11.
        !            45: An execution profiler and
        !            46: Wirth's cross reference program are also
        !            47: available with the system.
        !            48: .PP
        !            49: The system supports full Pascal.
        !            50: The language accepted is 
        !            51: `standard' Pascal,
        !            52: and a small number of extensions.
        !            53: There is an option to suppress the extensions.
        !            54: The extensions include a separate compilation facility
        !            55: and the ability to link to object modules
        !            56: produced from other source languages.
        !            57: .PP
        !            58: The
        !            59: .UM
        !            60: gives a list of sources relating to the
        !            61: .UX
        !            62: system, the Pascal language, and the
        !            63: .UP
        !            64: system.
        !            65: Basic usage examples are provided for the Pascal components
        !            66: .PI ,
        !            67: .X ,
        !            68: .IX ,
        !            69: .PC ,
        !            70: and
        !            71: .XP .
        !            72: Errors commonly encountered in these programs are discussed.
        !            73: Details are given of special considerations due to the
        !            74: interactive implementation.
        !            75: A number of examples are provided including many dealing with
        !            76: input/output.  An appendix supplements Wirth's
        !            77: .I "Pascal Report"
        !            78: to form the full definition of the Berkeley implementation of the language.
        !            79: .AE
        !            80: .sp
        !            81: .SH
        !            82: 'if n 'ND
        !            83: Introduction
        !            84: .PP
        !            85: The
        !            86: .UP
        !            87: .UM
        !            88: consists of five major sections and an appendix.
        !            89: In section 1 we give sources of information about 
        !            90: .UX ,
        !            91: about the programming
        !            92: language Pascal, and about the
        !            93: Berkeley
        !            94: implementation of the language.
        !            95: Section 2 introduces the
        !            96: Berkeley
        !            97: implementation and provides a number of tutorial examples.
        !            98: Section 3 discusses the error diagnostics produced by the translators
        !            99: .PC
        !           100: and
        !           101: .PI ,
        !           102: and the runtime interpreter
        !           103: .X .
        !           104: Section 4 describes input/output with special attention given to features
        !           105: of the interactive implementation and to features unique to
        !           106: .UX .
        !           107: Section 5 gives details on the components of the system
        !           108: and explanation of all relevant options.
        !           109: The
        !           110: .UM
        !           111: concludes with an appendix to Wirth's
        !           112: .I "Pascal Report"
        !           113: with which it forms a precise definition of the implementation.
        !           114: .SH
        !           115: History of the implementation
        !           116: .PP
        !           117: The first
        !           118: Berkeley
        !           119: system was written by Ken Thompson in early 1976.
        !           120: The main features of the present system were implemented by
        !           121: Charles Haley and William Joy during the latter half of 1976.
        !           122: Earlier versions of this system have been in use since January, 1977.
        !           123: .PP
        !           124: The system was moved to the \s-2VAX\s0-11
        !           125: by Peter Kessler and Kirk McKusick
        !           126: with the porting of the interpreter in the spring of 1979,
        !           127: and the implementation of the compiler in the summer of 1980.

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