gistfile1.rb

# ECE 486 Project 1
# PDP 8 Benchmarking tool 
# 

class PDP8
  
  f = File.open("add01.obj","r")
  lines = f.readlines
  f.close
  prog_data = Hash.new { |hash, key| hash[key] = {:addr => "", :data => ""} }
  ins = 0
  first_addr = false
  ac = 0              # => Accumulator 
  program_counter = 200 # => Program Counter starts at 200

  prog_addr = Hash.new 
  0.upto(prog_data.length-1) do |k|
    prog_addr[prog_data[k][:addr].to_i] = prog_data[k][:data] 
  end

  lines.each_index do |x|
    if(x % 2 == 0)
      if(lines[x].index('1') == 0)
        prog_data[ins][:addr] = "0" + lines[x][1..2].to_i.to_s + lines[x + 1][1..2]    
        prog_data[ins][:data] = lines[x + 2][1..2] + lines[x + 3][1..2]
        ins = ins + 1
        first_addr = true
      else
        if(!first_addr)
          prog_data[ins][:addr] = "0" + (prog_data[ins-1][:addr].to_i + 1).to_s
          prog_data[ins][:data] = lines[x][1..2] + lines[x + 1][1..2]       
          ins = ins + 1
        else
          first_addr = false
        end
      end
    end
  end

  0.upto(prog_data.length-1) do |l|
    puts "#{prog_data[l][:addr]} #{prog_data[l][:data]}"
    current_data = prog_data[l][:data]
    
    current_instruction = current_data[0..0].to_i
    pc = prog_data[l][:addr]
    eaddr = ""
    temp_data = 0
    case current_instruction
    when 0
       if(current_data[1..1].to_i < 4)         
        if(current_data[1..1].to_i < 2)
          eaddr = (current_data[1..1].to_i % 2).to_s + current_data[2..3]
        else
          eaddr = (pc[0..1].to_i*100 + (current_data[1..1].to_i % 2)*100 + current_data[2..3].to_i).to_s
        end
       elsif( current_data[1..1].to_i > 4 && current_data[1..1].to_i < 6) 
         eaddr = (current_data[1..1].to_i % 2).to_s + current_data[2..3]
         eaddr =prog_addr[eaddr.to_i]
       else
         eaddr = (pc[0..1].to_i*100 + (current_data[1..1].to_i % 2)*100 + current_data[2..3].to_i).to_s
         eaddr = prog_addr[eaddr.to_i]
      end
      temp_data = prog_addr[eaddr.to_i] 
      ac = temp_data.to_s.oct & ac.to_s.oct 
      ac = ac.to_s(8).to_i  
    end  
  end
  
  

  def stats
    
  end

  
end