Link to this headingCPUs

Link to this headingRegisters

MonikerDescription
CSCode Segment
DSData Segment
SSStack Segment
ESExtra Segment
FSGeneral-purpose Segment
GSGeneral-purpose Segment
CR0Control Register Flags
CR1Reserved Control Register
CR2virtual address of a page fault
CR3Control Register with Physical Base Address
CR4Control Register Flags
CR8external interrupts priorities

Link to this headingCR3

On x86, when paging is enabled (pretty much all the time in any modern operating system), CR3 points to the physical base address of the top level page table directory.