Module PTFLAGS Copy item path Source A Accessed; indicates whether software has accessed the 4-MByte page referenced by this entry. D Dirty; indicates whether software has written to the 4-MByte page referenced by this entry. G Global; if CR4.PGE = 1, determines whether the translation is global; ignored otherwise. P Present; must be 1 to map a 4-MByte page. PAT If the PAT is supported, indirectly determines the memory type used to access the 4-MByte page referenced by this entry;
otherwise, reserved (must be 0) PCD Page-level cache disable. PWT Page-level write-through. RW Read/write; if 0, writes may not be allowed to the 4-MByte page referenced by this entry. US User/supervisor; if 0, user-mode accesses are not allowed to the 4-MByte page referenced by this entry. Register A D G P PAT PCD PWT RW US