Initial commit.

COPYING

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+This image is made from the Scheme 48 1.9 distribution.
+
+It is distributed under the following terms:
+
+    Copyright © 1986-2001 Richard Kelsey and Jonathan Rees.
+    Copyright © 2001-2007 Michael Sperber and Martin Gasbichler.
+    Copyright © 2007-2012 Michael Sperber and Marcus Crestani.
+    All rights reserved.
+    
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notices, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notices, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+    3. The name of the authors may not be used to endorse or promote products
+       derived from this software without specific prior written permission.
+    
+    THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+    IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Scheme 48 1.9 derives from Scheme 48 0.58, which was developed by
+Richard Kelsey and Jonathan Rees and incorporates PreScheme 0.5 by
+Richard Kelsey.
+
+The distribution includes a number of contributions by permission:
+
+- This distribution includes code for sorting in directory scheme/sort
+  by Olin Shivers, under the public domain.
+
+- This distribution includes code for processing Unicode text 
+  contributed by Basis Technology Corporation, otherwise distributed
+  under the license above.

README

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+This is a Scheme48 PreScheme image suitable for use with the scheme48
+program. Example usage:
+
+scheme48 -i ps-compiler.image
+
+To build this image download and extract the Scheme48 distribution
+from s48.org. If needed, build and install Scheme48. Then in the
+ps-compiler/ directory of the Scheme48 distribution start scheme48 and
+enter the following commands:
+
+,config ,load ../scheme/prescheme/interface.scm
+,config ,load ../scheme/prescheme/package-defs.scm
+,exec ,load load-ps-compiler.scm
+,in prescheme-compiler prescheme-compiler
+,user (define prescheme-compiler ##)
+,dump ps-compiler.image "(Pre-Scheme)"
+,exit