On Tuesday, November 12, 2002, at 04:13 PM, Eugene Lee wrote: > Nope. You can have protected memory without swap (diskless computers). > And you can have swap without protected memory (old Mac OS, old > Windoze). > Protected memory means that processes can only hose their own memory > space, and not hose other processes' memory spaces. > > Okay, repeat: > > Virtual memory: when you run out of real memory > > Protected memory: your app can't corrupt the memory > space of other apps > > They don't really need each other. But the fact that pages are the > same > size makes the implementation lots easier.
conceptually, you are correct. however, MOST Protected Memory schemes use Virtual Memory to do what they do. not all, but most. There's no real reason why it must be this way... it's just the most simple way to do it on some OS's. -- G-Books is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Check our web site for refurbished PowerBooks | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-Books list info: <http://lowendmac.com/lists/g-books.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:G-Books@;mail.maclaunch.com> To unsubscribe, email: <mailto:G-Books-off@;mail.maclaunch.com> For digest mode, email: <mailto:G-Books-digest@;mail.maclaunch.com> Subscription questions: <mailto:listmom@;lemlists.com> Archive: <http://www.mail-archive.com/g-books%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
