#=======================================================================
# machine.py
#=======================================================================

#-----------------------------------------------------------------------
# Machine
#-----------------------------------------------------------------------
class Machine( object ):
  def __init__( self, memory, register_file, debug, reset_addr=0x400 ):

    self.pc       = reset_addr
    self.rf       = register_file
    self.mem      = memory

    self    .debug = debug
    self.rf .debug = debug
    self.mem.debug = debug

    # common registers
    self.status        = 0
    self.stats_en      = 0
    self.num_insts       = 0
    self.stat_num_insts  = 0

    # we need a dedicated running flag bacase status could be 0 on a
    # syscall_exit
    self.running       = True

  def fetch_pc( self ):
    return self.pc

@@ -762,11 +762,12 @@
 ag b
-a
+e
 ca
+u
 se s

FIX typo.