ProtectionTwo means will ensure Protection via Matrix: (1) Control bits in the Matrix Entry, and (2) the "multidimenssionilty" of the Matrix.
Control bits are:
D15 S Supervisor The referred Page Frame is for Supervisor use only
D14 W Write The referred Page Frame can be written
D13 D Dirty The referred Page content have changed
D12 P Present There is a Page Frame associated to this record
D11 r (reserved) Not used
D10 r (reserved) Not used
Multidimensionality refers to the fact that the Matrix has N times P rows, where N=1024 is the total number of Page Frames in the Linear Space, and P=64 is the number of allowed symultaneous processes. Thus the Matrix provides each process with its own view (different dimenssion) of the same Linear Space.
The Operating System is expected to use these resources to provide General Protection.
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