REVIEW
                         TEST III CS475
                        CLOSED BOOK EXAM
                   During Scheduled Final Time
on May 9, 1996 8AM to 10:30AM
Test is 100 points.  100 points for test three and 0 points for final.

FIOS
user state vs system state
control blocks and monolithic OS
unwinding the monolithic OS into user routines to do some of the system work
Control block/monolithic code verses user level system code - messaging

IBM OS/360/370
  SVC rings of access (type 1,2,3,4)
    can only call lower levels of protection ring

MULTICS
  protection rings
  outward calls
  access to routines limited to entry points
  access based on segments
  data and routine access similar to OOP

AMOEBA
  processor pool
  microkernel
  threads
  ports and capability
  in memory files, bullet sever
  group sequencer

Mach
  microkernel
  ports (messages)
  process (threads)
  memory regions (objects)
  user code paging system
  networking
  MIG compiler support
  UNIX
    trampoline mechanism
    i-node pager