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PSD, the Portable Scheme Debugger

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Resurrected from a tar ball in 2018. Original README below. I suppose
this proves that software never dies...

PSD - THE PORTABLE SCHEME DEBUGGER 
VERSION 1.3, 1993

This is psd, the portable Scheme debugger. It does source code
debugging for any R4RS compliant Scheme interpreter when run in a
GNU Emacs buffer (either version 18 or 19). With psd you can
 * set and clear breakpoints
 * single step evaluation
 * examine and change the variables of the debugged program
 * follow execution in an editor window
 * run a program until a run time error occurs, and examine the state
   of the program

You can find the latest version of psd in
cs.tut.fi:/pub/src/languages/schemes. It is also available in the
Scheme repository at nexus.yorku.ca and its mirror sites, at least
ftp.inria.fr and faui80.informatik.uni-erlangen.de.

TO INSTALL AND RUN: see the manual in doc/

Psd is known to work with Aubrey Jaffer's scm, but porting to other
Schemes should be easy.  In fact, for a R4RS Scheme you should not
have "port" it at all. It works also with Elk v. 1.5 and the sci
interpreter in the Scheme->C system.

Files in the distribution:

* README			this file
* doc/article.tex	a technical description of psd
* doc/article.bbl	LaTeX bibliography
* doc/article.ps		PostScript file derived from article.tex
* doc/manual.tex		a user's manual
* doc/manual.bbl		bibliograpy
* doc/manual.ps		user's manual in PostScript
* doc/quick-intro.	tex quick reference for psd
* doc/quick-intro.ps

* psd.el			psd minor mode for Emacs

* psd.scm		the generic main file that takes care of loading psd
* psd-slib.scm		main file to be used with slib
* psd-scm.scm    	ditto for scm without slib (you should really get slib)
* psd-sci.scm		ditto for sci (tested with version 28sep90jfb)
* instrum.scm		the instrumentation code
* pexpr.scm		definition of pexps, which are sexps with position information 
* read.scm		the reader for psd
* runtime.scm		runtime support for debugging
* primitives.scm 	runtime support that has to know about primitive procedures 
* version.scm    	announces the psd version
* qp.scm	        	print any Scheme object in one line, truncating if necessary. Normally this comes from slib.
* cmuscheme.el		the CMU Scheme mode for GNU Emacs by Olin Shivers. 
* comint.el		support for cmuscheme.el

Comments, suggestions and bug reports are welcome.

Cheers, Pertti

psd

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