Class: Z80Disassembler::Disassembler

Inherits:
Object
  • Object
show all
Defined in:
lib/z80_disassembler.rb

Constant Summary collapse

T_R =

0 1 2 3 4 5 6 7

[    'B',    'C',    'D',    'E',    'H',    'L', '(HL)',    'A'].freeze
T_CC = 
[   'NZ',    'Z',   'NC',    'C',   'PO',   'PE',    'P',    'M'].freeze
T_ALU = 
[  'ADD',  'ADC',  'SUB',  'SBC',  'AND',  'XOR',   'OR',   'CP'].freeze
T_ROT = 
[  'RLC',  'RRC',   'RL',   'RR',  'SLA',  'SRA',  'SLL',  'SRL'].freeze
T_IM = 
[    '0',  '0/1',    '1',    '2',    '0',  '0/1',    '1',    '2'].freeze
T_RP = 
[   'BC',   'DE',   'HL',   'SP'].freeze
T_RP2 = 
[   'BC',   'DE',   'HL',   'AF'].freeze
ASCII = 
[
  ' ', '!', '"', '#', '$', '%', '&', "'", '(', ')', '*', '+', ',', '-', '.', '/',
  '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?',
  '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
  'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', '\\',']', '^', '_',
  '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
  'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~'
].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file, org = 32_768) ⇒ Disassembler

Returns a new instance of Disassembler.



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# File 'lib/z80_disassembler.rb', line 28

def initialize(file, org = 32_768)
  @file = file; @org = org.to_i
  if file.original_filename[-3..-1] == '.$C'
    File.open(@file) do |f|
      z = f.read(17)
      @file_name   = "#{z[0..7]}.#{z[8]}"
      @org         = bytes_to_int(z[ 9..10])
      @file_size   = bytes_to_int(z[11..12])
      @sectors     = bytes_to_int(z[13..14])
      checksum1    = bytes_to_int(z[15..16])
      checksum2    = (z[0..14].sum * 257 + 105).to_s(16)[-4..-1].hex
      @code        = f.read(@file_size).bytes if checksum1 == checksum2
    end
  end
  @code ||= File.open(@file).read.bytes
  @file_size ||= @file.size
  @x = 0; @y = 0; @z = 0; @p = 0; @q = 0; @xx = nil
  @lambda = nil; @prefix = nil; @prev = nil
  @hash_links = {}; @del_links = []
  @rmda = """
;--- #{Date.today} --- https://rmda.su
;    _______  _/| __ ______    ____
;   /  __   //  |/  \\\\   _  \\ /    \\
;  /   _/ _//        \\\\  \\\\  \\\\  \\  \\
;  \\___\\   \\\\___\\/___//______//__/\\__\\
;       \\__/
;--- size: #{@file_size}b #{"--- filename: #{@file_name}" if @file_name}

  """
end

Instance Attribute Details

#file_size ⇒ Object (readonly)

Returns the value of attribute file_size.



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# File 'lib/z80_disassembler.rb', line 9

def file_size
  @file_size
end

#org ⇒ Object (readonly)

Returns the value of attribute org.



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# File 'lib/z80_disassembler.rb', line 9

def org
  @org
end

#rmda ⇒ Object (readonly)

Returns the value of attribute rmda.



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# File 'lib/z80_disassembler.rb', line 9

def rmda
  @rmda
end

Class Method Details

.compile_text(file_name) ⇒ Object 



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# File 'lib/z80_disassembler.rb', line 113

def self.compile_text(file_name)
  name = file_name.split('/').last
  [
    'length equ end - begin',
    'CODE      = #AF',
    'USR       = #C0',
    'LOAD      = #EF',
    'CLEAR     = #FD',
    'RANDOMIZE = #F9',
    '        org #5C00',
    'baszac  db 0,1',    # Line number
    '        dw linlen', # Line length
    'linzac  db CLEAR, "8", #0E, 0, 0',
    '        dw begin - 1',
    '        db 0, ":"',
    '        db LOAD, "\""',
    'codnam  ds 10, 32',
    '        org codnam',
    '        db "disasm"',
    '        org codnam + 10',
    '        db "\"", CODE, ":"',
    '        db RANDOMIZE, USR, "8", #0E, 0, 0',
    '        dw begin',  # call address
    '        db 0, #0D',
    'linlen = $ - linzac',
    'baslen = $ - baszac',
    "        emptytap '#{file_name}.tap'",
    "        savetap '#{file_name}.tap', BASIC, '#{name}', baszac, baslen, 1",
    "        savetap '#{file_name}.tap', CODE,  '#{name}', begin,  length, begin",
    "        savesna '#{file_name}.sna', begin",
    "        savebin '#{file_name}.bin', begin, length",
    "        savehob '#{file_name}.$C', '#{file_name}.bin', begin, length",
    ''
  ].join("\n")
end

Instance Method Details

#start ⇒ Object 



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# File 'lib/z80_disassembler.rb', line 59

def start
  result = []
  addr = @org
  bytes = []; ascii = []
  @code.each do |byte|
    load_vars(byte)
    str = command_from_byte(byte)
    @prev = byte.to_s(16)
    ascii << ((32..126).include?(byte) ? ASCII[byte - 32] : ' ')
    bytes << @prev.rjust(2, '0').upcase
    next unless str

    result << [addr, "##{addr.to_s(16)}".upcase, str, bytes.join(' '), ascii.join]
    addr += bytes.size
    bytes = []
    ascii = []
  end

  link_num = 0
  int_addrs = @org..(@org + @file_size)
  result.select { |z| z[2] =~ /#[0-F]{4}/ && int_addrs.include?(z[2].split('#').last[0..3].hex) }.each do |x|
    z = "##{x[2].split('#').last[0..3]}"
    @hash_links[z] = "link_#{link_num += 1}" unless @hash_links[z]
  end
  result.select { |z| z[2] =~ /\$/ }.each do |x|
    z = "##{ (x[0] + x[2].split('$').last.to_i).to_s(16).upcase }"
    @hash_links[z] = "link_#{link_num += 1}" unless @hash_links[z]
  end
  code = result.map do |addr_, addr16, str, bytes_, ascii_|
    @del_links << @hash_links[addr16] if @hash_links[addr16]
    link = (@hash_links[addr16] ? (@hash_links[addr16] + ':') : '').ljust(16, ' ')
    substr, adr = if str.include?('$')
                    ["$#{str.split('$').last}", "##{(addr_ + str.split('$').last.to_i).to_s(16).upcase}"]
                  else
                    adr = "##{str.split('#').last[0..3]}"
                    [adr, adr]
                  end
    string = @hash_links.keys.include?(adr) ? str.sub(substr, @hash_links[adr]) : str

    defb = bytes_.split(" ").map { |x| "##{x}"}.join(",")
    "#{link} #{string.ljust(16, ' ')}; #{addr16.ljust(5, ' ')} / #{addr_.to_s.ljust(5, ' ')} ; #{ascii_.ljust(4, ' ')} ; #{defb}"
  end.join("\n")
  [
      @rmda,
      '                 device zxspectrum128',
      '                 ORG #' + @org.to_s(16),
      @hash_links.map { |key, val| "#{(val + ':').ljust(16, ' ')} EQU #{key}" unless @del_links.include?(val) }.compact.join("\n"),
      'begin:',
      code,
      'end:',
      ''
  ].join("\n")
end