A page address register (PAR) contains the physical addresses of pages currently held in the main memory of a computer system. PARs are used in order to avoid excessive use of an address table in some operating systems. A PAR may check a page's number against all entries in the PAR simultaneously, allowing it to retrieve the pages physical address quickly. A PAR is used by a single process and is only used for pages which are frequently referenced (though these pages may change as the process's behaviour changes in accordance with the principle of locality). An example computer which made use of PARs is the Atlas.
Read more about Page Address Register: See Also
Famous quotes containing the words page, address and/or register:
“He crafted his writing and loved listening to those tiny explosions when the active brutality of verbs in revolution raced into sweet established nouns to send marching across the page a newly commissioned army of words-on-maneuvers, all decorated in loops, frets, and arrowlike flourishes.”
—Alexander Theroux (b. 1940)
“If you address a ghost as “Thing!”
Or strike him with a hatchet,
He is permitted by the King
To drop all formal parleying—
And then you’re sure to catch it!”
—Lewis Carroll [Charles Lutwidge Dodgson] (1832–1898)
“A funeral is not death, any more than baptism is birth or marriage union. All three are the clumsy devices, coming now too late, now too early, by which Society would register the quick motions of man.”
—E.M. (Edward Morgan)