Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!samsung!sol.ctr.columbia.edu!src.honeywell.com!msi.umn.edu!cs.umn.edu!talon.UCS.ORST.EDU!sequent!uunet!wuarchive!decwrl!pa.dec.com!bacchus!mwm From: mwm@pa.dec.com (Mike (My Watch Has Windows) Meyer) Newsgroups: comp.sys.amiga.introduction Subject: Virtual Memory (Was: Difference between 7.0 and AMIGA multitasking???) Message-ID: Date: 15 Jun 91 19:16:56 GMT References: <1991Jun13.190302.16896@ccu.umanitoba.ca> <1991Jun14.154041.15151@world.std.com> Sender: news@pa.dec.com (News) Distribution: global Organization: Missionaria Phonibalonica Lines: 21 In-Reply-To: awm@world.std.com's message of Fri, 14 Jun 1991 15:40:41 GMT In article <1991Jun14.154041.15151@world.std.com> awm@world.std.com (Andrew W MacDonald) writes: This seems likely. Unless you have virtual memory, you can only run as many applications as will fit in main memory. Um, well, actually, you can only have as many active tasks as will fit in main memory unless you have demand paged virtual memory. If you're willing to inactivate a task and swap it out, the limit is swap space, not real memory. However, you still can't run a task bigger than real memory. And swapping isn't restricted to old, slow machines. Fast new machines (like those from a little company called Cray Research) are built on the principle of "real memory for real performance". Though they do have a virtual memory map, they don't support demand paging, and swap.