Simple CPU

cpu.rb

# Main class for emulating the simplest CPU
class CPU
  attr_reader :al, :ah, :ax
  attr_writer :registers

  def initialize
    @al = 0
    @ah = 0
    @ax = 0
  end

  def al=(value)
    @al = value.nil? ? @ax & 255 : value
    @ax = (@ah << 8) + @al
  end

  def ah=(value)
    @ah = value.nil? ? (@ax & 65_280) >> 8 : value
    @ax = (@ah << 8) + @al
  end

  def ax=(value)
    @ax = value.nil? ? (@ah << 8) + @al : value
    @al = @ax & 255
    @ah = (@ax & 65_280) >> 8
  end

  def mov(from, to)
    new_hash = { to => from }
    p new_hash
    registers.merge!(new_hash)
  end

  def registers
    @registers = { al: al, ah: ah, ax: ax }
  end
end

cpu = CPU.new
# cpu.al = 5
# cpu.ah = 2
cpu.ax = 517
puts cpu.registers
cpu.mov(50, :al)
puts cpu.registers