Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!batcomputer!mha From: mha@batcomputer.tn.cornell.edu (Mark H. Anbinder) Newsgroups: comp.sys.mac Subject: Re: 68851 PMMU Test... Message-ID: <8386@batcomputer.tn.cornell.edu> Date: 12 Jul 89 23:49:19 GMT References: Reply-To: mha@tcgould.tn.cornell.edu (Mark H. Anbinder) Organization: Baka Industries, Ithaca, New York Lines: 28 In article aw1j+@andrew.cmu.edu (Adam Duncan Warr) writes: >There is no way to really test to see if the PMMU is >functioning correctly(at least I don't know a way). >Except! If you have the Virtual INIT and install it on >you Mac, you will find that, given you have enough space >on your hard drive, you have 8 megs of virtual memory. > Tha is the best test I know of. I have done this test on >several machines where I work. It will tell you if your >PMMU is working. If you boot your machine with Virtual, checking that the About the Finder box shows that you have 8,192K of RAM DOES NOT mean that Virtual OR your PMMU are working properly. All that shows is that Virtual has TOLD the Macintosh that it has access to 8 megs, and the Mac believed it. The paging would still fail if your PMMU were not working properly. The only way to check your PMMU with Virtual is to boot up, and then load several memory-intensive programs into memory and use them. Load your favorite GIF viewer and look at a few full-screen images. Try Canvas on a large document. Basically, until you've convinced Virtual to do some page swapping, you can't be sure the PMMU is actually working. -- Mark H. Anbinder ************************** mha@tcgould.tn.cornell.edu Baka Industries ** (biar!)memory!mha.uucp 200 Pleasant Grove Rd. H: (607) 257-7587 ******** Ithaca, NY 14850 W: (607) 257-2070 ******* "It's not safe out here." Q