!created 18-Dec-89 !iopage_fig.psart (chapter 2) +---------------+ <----------+ # I/O PAGE # | +---------------+ <---+ | | | MEMORY | | 28K +---------------+ | | # # | | +---------------+ | | # # | | +---------------+ | | # # | | + # # | | BUS ADDRESS | CONTENTS # # | +------ +===========+======================================+ # # | # | PROCESSOR STATUS WORD # # # | # 777 776 | (FOR SOME PROCESSORS) # # # | +-----------+--------------------------------------+ # # | # -- | # # # | # -- | # # # | # -- | # # # | +-----------+--------------------------------------+ # # | # 777 566 | CONSOLE TERMINAL # # # | # -- | INTERFACE # # # | # 777 560 | # # # | +-----------+--------------------------------------+ # # | # -- | # # # | # -- | # +---------------+ | # -- | DEVICE REGISTERS # 476 # INTERRUPT # | # -- | # 60 # VECTORS # | # -- | # +---------------+ | +-----------+--------------------------------------+ 56 # SYSTEM # | # 763 776- | TOP OF FLOATING ADDRESSES # # COMMUNICATION # | +-----------+--------------------------------------+ 40 # AREA # | # 760 010 | START OF FLOATING ADDRESSES # +---------------+ +------------- +-----------+--------------------------------------+ 36 # TRAP # # 760 000 | START OF I/O PAGE # # VECTORS # +===========+======================================+ 0 +===============+