Note: The Ada/Ed interpreter for Ada 83 should not be confused with the
GNU Ada compiler (GNAT), which NYU is also working on. GNAT is separately available.
Ada/Ed is a translator/interpreter (for Unix and DOS-386 machines) for
Ada 83 developed at New York University (NYU) as part of project in
language definition and software prototyping. It is intended as a
teaching tool and does not have the capacity, performance, or robustness
of commercial Ada compilers.
As a translator-interpreter, Ada/Ed does not implement most
representation clauses and, therefore, does not support systems
programming close to the machine level. It will not produce a stand-
alone executable version; rather, Ada/Ed is needed in order to run
Ada/Ed is not currently a validated Ada system. It was last validated
under Version 1.7 of the Ada Compiler Validation Capability (ACVC) test
suite, but fails just over 100 tests in the current ACVC test suite for
Ada 83 compilers, Version 1.11. Users can expect to find small
discrepancies between Ada/Ed and currently validated compilers.
Despite these limitations, Ada/Ed is of much use to the students,
educators, users, and implementors in the Ada community.
The Ada/Ed system includes the following commands:
adacomp [-abgsv] [-m main_unit] [-n] [-l library] file
adabind [-m main_unit] [-l library]
adaexec [-h heap] [-m bound_main_unit] [-p pstack] [-s tstack]
[-r nb_stmts] [-t [acerst]] [-l library]
adalib [-l library]
adacomp compiles an Ada program by invoking in succession the two
compilation phases: parsing and semantic analysis (the front-end) and
code generation. The file argument refers to the source file; if no
extension is given for it, the extension ADA is assumed. The file
argument may contain drive and directory specifications. The output of
the compiler is an instruction stream for an abstract Ada machine, which
is then interpreted. adabind binds a given library with the specified
main unit to form an executable program. adaexec invokes the Ada
machine interpreter for the bound program given in the specified
library. adalib displays the contents of the specified library.
For more information on using Ada/Ed, access the README file from the
distribution of Ada/Ed version 1.11.2-PC, an interpreter for 386/486
machines running MS-DOS/PC-DOS.
The Ada/Ed system (release 1.11.0a, Copyright 1986-1992 New York
University) can be found on NYU's Computer Science Internet host (IP address:
220.127.116.11) and retrieved via ftp:
Ada/Ed is freely available and may be redistributed and modified under
the terms of Version 2 (or any later version) of the GNU General Purpose
License as published by the Free Software Foundation. The software is
distributed absolutely without any warranty, not even the implied
warranty of merchantability or fitness for a particular purpose. For
more information, refer to the full text of the GNU General Purpose
License; copies may be requested from:
Free Software Foundation
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
User Registration and Software Maintenance
All users of Ada/Ed are urged to register themselves by contacting:
New York University
251 Mercer Street
New York, NY 10012
Registration will allow the developers to notify users of updates and
new releases of the system. Those that modify or adapt the system are
also encouraged to let the NYUAda project know what creative uses they
have found for the system.
The NYUAda project does not have the resources to promise regular new
maintenance releases of the software, but will do its best to keep track
of reported errors, work-arounds, and fixes. They will also produce at
irregular intervals design notes and additional documentation on the
front-end of the system. Users are urged to e-mail comments,
corrections, and bug reports (reduced to their simplest form!) to: firstname.lastname@example.org.