Berkeley Pascal User's Manual
Version 1.1 \- April, 1979
Computer Science Division
.if n Department of Electrical Engineering
.if n and Computer Science
.if t Department of Electrical Engineering and Computer Science
University of California, Berkeley
Berkeley, California 94720
\s-2(C)\s0 1977, 1979 William N. Joy, Susan L. Graham, Charles B. Haley
* Author's current address: Bell Laboratories, Murray Hill NJ 07974
is designed for interactive instructional use
and runs on the \s-2PDP\s0 11 family of computers.
It produces interpretive code,
providing fast translation at the expense of slower execution speed.
An execution profiler and
Wirth's cross reference program are also
available with the system.
..An interpretive implementation for the \s-2VAX\s0 11/780 is nearly complete,
..and a compiled version of the system, utilizing the code generator of
..the portable C compiler, is under construction, and should be completed by
The system supports full Pascal, with the exception of
The language accepted is very close to
with only a small number of extensions.
gives a list of sources relating to the
system, the Pascal language, and the
Basic usage examples are provided for the Pascal
Errors commonly encountered in these programs are discussed.
Details are given of special considerations due to the
interactive implementation.
A number of examples are provided including many dealing with
input/output. An appendix supplements Wirth's
to form the full definition of the Berkeley implementation of the language.
* The financial support of the first and second authors' work by
the National Science Foundation under grants
MCS74-07644-A03 and MCS78-07291,
and the first author's work by an
are gratefully acknowledged.
** Author's present address: Bell Laboratories, Murray Hill, NJ 07974.
consists of five major sections and an appendix.
In section 1 we give sources of information about
language Pascal, and about the
implementation of the language.
implementation and provides a number of basic examples.
Section 3 discusses the error diagnostics produced by the translator
and the runtime interpreter
Section 4 describes input/output with special attention given to features
of the interactive implementation and to features unique to
Section 5 gives details on the components of the system
and explanation of all relevant options.
concludes with an appendix to Wirth's
with which it forms a precise definition of the implementation.
History of the implementation
system was written by Ken Thompson in early 1976.
The main features of the present system result from the work
of Charles Haley and William Joy during the latter half of 1976.
Earlier versions of this system have been in use since January, 1977.