_____
	 __  __ __ __  _ __   ____ ____ _   _ ____ __  __ ____  (___  )
	|  \/  |  |  \| |  | / ___)  __) |_| | ___)  \/  | ___)    / /
	|      |  |     |  | \___ \ (__|  _  | __)|      | __)    (_ \
	|_|\/|_|__|_|\__|__| (____/____)_| |_|____)_|\/|_|____)  _  \ \
	                                                        ( \_/ /
	                                                         \___/

	.==============================================================.
	|                                                              |
	|     ::::::::: Mini Scheme Interpreter Version 3 :::::::::    |
	|                                                              |
	|                   Coded by Atsushi Moriwaki                  |
	|                                                              |
	|                     Revised by Akira KIDA                    |
	|                                                              |
	|                  Revised again by Nils M Holm                |
	|                                                              |
        `=============================================================='

	::::: Changes ::::::::::::::::::::::::::::::::::::::::::::::::::

	For a detailed list of past-2009 changes, please have a look at
	the HISTORY file.

	These are the changes I (nmh) applied to Mini-Scheme 0.85k4:

	* Additions
		- compacting string collector, includes strings
		  in the garbage collection;
		- type checking in primitive procedures;
		- char type and related procedures;
		- string procedures;
		- variadic MAP, FOR-EACH, and APPEND procedures;
		- replaced MACRO by more common DEFINE-MACRO;
		- (non-R4RS) EXPAND-MACRO and GENSYM;
		- unary -;
		- variadic APPLY;
		- variadic <, <=, =, >, and >= procedures;
		- overflow checking in numeric procedures;
		- WITH-INPUT-FROM-FILE and WITH-OUTPUT-TO-FILE;
		- #<EOF> object and EOF-OBJECT? procedures;
		- READ-CHAR, PEEK-CHAR, WRITE-CHAR procedures;
		- ABS, EVEN?, ODD?, EXPT, GCD, LCM, MIN, MAX
		  procedures;
		- single-argument MAKE-STRING;
		- LIST? procedure.

	* Minor modifications
		- the init file is now compiled into the executable;
		- rewrote QUASIQUOTE (non-nesting, but simpler);
		- changed allocation strategy (cell pool cannot run dry);
		- rewrote Makefile;
		- ANSI-fied the code;
		- rewrote some error messages;
		- renamed init.scm to miniscm.scm.
		- replaced DO macro;

	* Small fixes (very few!)
		- renamed / to QUOTIENT, because that's what it does;
		- "\\" was not a valid string;
		- made the reader fold input to lower case;
		- DELAY macro (don't remember, was somehow broken).

	* Removals
		- most non-R4RS procedures;
		- support for most legacy compilers (except Turbo C);
		- rather half-baked #o and #x prefixes (also #d).

	::::: Omissions from R4RS ::::::::::::::::::::::::::::::::::::::

	* System Interface
		- LOAD cannot be nested.

	* Control procedures
		- the => syntax of COND;

	* Pairs
		- four-level pair access: CAAAAR .. CDDDDR.

	* Numeric operations
		- complex, real, rational numbers, bignum integers;
		- omitted procedures (long list):
			/, ACOS, ANGLE, ASIN, ATAN, CEILING, COMPLEX?,
			COS, DENOMINATOR, EXACT->INEXACT, EXACT?, EXP,
			FLOOR, IMAG-PART, INEXACT->EXACT, INEXACT?,
			INTEGER?, LOG, MAGNITUDE, MAKE-POLAR,
			MAKE-RECTANGULAR, MODULO, NUMERATOR, RATIONAL?,
			RATIONALIZE, REAL-PART, REAL?, ROUND, SIN, SQRT,
			TAN, TRUNCATE.

	* Vectors
		- vector data typa and syntax;
		- vector operations:
			LIST->VECTOR, MAKE-VECTOR, VECTOR,
			VECTOR->LIST, VECTOR-FILL!, VECTOR-LENGTH,
			VECTOR-REF, VECTOR-SET!, VECTOR?.

	* Ports
		- user-visible ports and port-related procedures:
			CALL-WITH-INPUT-FILE, CALL-WITH-OUTPUT-FILE,
			CLOSE-INPUT-PORT, CLOSE-OUTPUT-PORT,
			CURRENT-INPUT-PORT, CURRENT-OUTPUT-PORT,
			INPUT-PORT?, OPEN-INPUT-FILE, OPEN-OUTPUT-FILE,
			OUTPUT-PORT?;
		- CHAR-READY?;
		- these procedures do not accept port arguments:
			DISPLAY, NEWLINE, PEEK-CHAR, READ, READ-CHAR,
			WRITE, WRITE-CHAR.

		NOTE: This version of Mini Scheme *does* have
		WITH-INPUT-FROM-FILE, WITH-OUTPUT-TO-FILE, and
		EOF-OBJECT?, because these do not require
		user-visible ports.

	* Other:
		- TRANSCRIPT-ON, TRANSCRIPT-OFF.

	::::: Additions to R4RS ::::::::::::::::::::::::::::::::::::::::

	* DEFINE-MACRO
		Like the original Mini-Scheme, this version supports
		low-level macros. However, macro arguments are
		destructured instead of passing entire special forms
		to macro handlers:

		(define-macro foo (lambda (a b c) `(list ',a ',b ',c)))
		(foo a b c) ==> (a b c)
	
	* GENSYM
		Generates a unique symbol name, useful for writing
		low-level macros.

	* EXPAND-MACRO
		Expands a (quoted) macro application and returns the
		expanded form.

	::::: Feedback :::::::::::::::::::::::::::::::::::::::::::::::::

	Please send bug reports and other feedback to nmh@t3x.org.

	::::: Acknowledgements :::::::::::::::::::::::::::::::::::::::::

	Thanks to Atsushi Moriwaki and Akira KIDA for writing and
	maintaining the original Mini-Scheme. Arigatou gozaimashita.