Outline for April 2, 2008

Reading: Text, §1

1. Greetings and felicitations!
   1. Reminder: discussion section today, 2:10–3:00 PM, in 1204 Haring
2. Third generation (integrated circuits)
   continued from last lecture
   1. Protection, traps, fence registers, privileges, system calls, time sharing
   2. Virtual machines: levels of abstraction; example: THE system
      1. Level 0: hardware
      2. Level 1: segment controller process
      3. Level 2: operator console (message interpreter)
      4. Level 3: I/O handlers
      5. Level 4: user processes
   3. Customer service, compatibility
3. Fourth generation (VLSI)
   1. Minicomputers: rise of the UNIX operating system
   2. Microcomputers: workstations, personal computers, open operating systems
4. Networked and distributed operating systems
5. Operating system I/O functions
   1. Read data: polling, interrupts
   to be continued