README

   1 App-Scheme79asm version 0.005
   2 =============================
   3
   4 SIMPLE is a LISP processor defined in the 1979
   5 B<Design of LISP-Based Processors> paper by Steele and Sussman.
   6
   7 The SIMPLE processor expects input in a particular tagged-pointer
   8 format. This module takes a string containing a sequence of
   9 S-expressions. Each S-expression is a list of one of three types:
  10
  11 (tag value), for example (symbol 2), represents a value to be
  12 put in memory (for example a number, or a symbol, or a variable
  13 reference). The value must be a number.
  14
  15 (tag list), where list is of one of these three types,
  16 represents a tagged pointer. In this case, list is (recursively)
  17 laid out in memory as per these rules, and a pointer to that location
  18 (and tagged tag) is put somewhere in memory.
  19
  20 (tag list1 list2), where list1 and list2 are of one of these
  21 three types (not necessarily the same type). In this case, list1
  22 and list2 are (recursively) laid out in memory such that list1
  23 is at position X and list2 is at position X+1, and a pointer of
  24 type tag and value X is put somewhere in memory.
  25
  26 After this process the very last pointer placed in memory is moved to
  27 the special location 5 (which is where SIMPLE expects to find the
  28 expression to be evaluated).
  29
  30 In normal use a single S-expression will be supplied, representing an
  31 entire program.
  32
  33 INSTALLATION
  34
  35 To install this module type the following:
  36
  37    perl Makefile.PL
  38    make
  39    make test
  40    make install
  41
  42 DEPENDENCIES
  43
  44 This module requires these other modules and libraries:
  45
  46 * Data::SExpression
  47 * List::MoreUtils
  48
  49 COPYRIGHT AND LICENCE
  50
  51 Copyright (C) 2018 by Marius Gavrilescu
  52
  53 This library is free software; you can redistribute it and/or modify
  54 it under the same terms as Perl itself, either Perl version 5.24.3 or,
  55 at your option, any later version of Perl 5 you may have available.
  56
  57