(Class notes Mon, Mar 28, 2005)

Simulate the Simpletron
   - print welcome message ==> sm_welcome()
   - initialize memory     ==> sm_init_memory( mem )
   - initialize registers  ==> sm_init_regs( ... )
   - run the machine       ==> sm_run_machine( acc, instrCtr, instrReg, mem )
          - dump machine state ==> sm_dump( ... )



initialize memory
   - set all memory slots to 0
   - i = 0;
     read data;
     while (data != -99999)
         mem[i] = data;
         i++;
         read next data



run the machine
   - int machine_running = 1
   - while (machine_running) {
          instrReg = memory[instrCtr]
          op_code = instrReg / 100;
          operand = instrReg % 100;
          switch (op_code) 
             case READ:  .... ; break;
             ....
             case HALT: machine_running = 0; break;
     }