!edited 18-Dec-89
!BGJOB_fig.psart (chapter 2)

    +------------------+
    #   I/O PAGE       #
    +------------------+

            MEMORY
28K +------------------+
    #  SYSTEM          #          BG JOB HIGH LIMIT
    #  DEVICE HANDLER  #       ^
    +------------------+     /
    #  RESIDENT        #   /
    #  MONITOR         # /
    +------------------+  <-------+
    #                  #          |
    #    USR           #          |
    +------------------+          |
    # KEYBOARD         #          |
    # MONITOR          #          +---------  +============================================+
    +------------------+                      #  USR SWAP SPACE                            #
    #                  #                      +--------------------------------------------+
    #                  #                      #  FETCHED HANDLER SPACE                     #
    #                  #                      #  (USUALLY PART OF THE VARIABLE AREA)       #
    #                  #                      +--------------------------------------------+
    #                  #                      #  VARIABLE SIZE DATA AREA                   #
    #                  #                      #  (OBTAINED BY .SETTOP                      #
    #                  #                      +--------------------------------------------+
1000+------------------+                      #  FIXED DATA AREA                           #
    # DEFAULT          #                      #  (ASSEMBLED)                               #
776 # BACKGROND        #                      +--------------------------------------------+
    # STACK            #                      #  CODE AREA                                 #      
500 +------------------+ <---------+          #  (ASSEMBLED)                               #         
476 # INTERRUPT        #           |          +--------------------------------------------+
 60 # VECTORS          #           |          #  STACK                                     #    
    +------------------+           |          #                                            #         
 56 # SYSTEM           #           +--------  +--------------------------------------------+
    # COMMUNICATION    # 
 40 # AREA             # 
    +------------------+ 
 36 # TRAP             #
    # VECTORS          #    
  0 +==================+