Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!tut.cis.ohio-state.edu!ucbvax!bloom-beacon!eru!luth!sunic!tut!ra!vinsci From: vinsci@ra.abo.fi (Leonard Norrgard) Newsgroups: comp.sys.amiga.tech Subject: Re: DMA in VM Message-ID: Date: 1 Dec 89 01:02:02 GMT References: <14059@grebyn.com> <2054@atanasoff.cs.iastate.edu> <14060@grebyn.com> Sender: vinsci@ra.abo.fi Organization: Computer Centre, Abo Akademi University Lines: 16 In-reply-to: ckp@grebyn.com's message of 30 Nov 89 17:31:37 GMT >> "I so glad I bought the virtual memory addon for my >> Mac. Now I'm gonna make a *really* big RAM disk with it." >> >Laugh if you like. In VAX/VMS, every part of a process is virtual >memory, including any IO buffering. The IO system takes care of ensuring >that such pages are resident and locked for the duration of a DMA IO >transfer. Not necessarily. But unless you have done systems programming under VAX/VMS, it is unlikely that you ever have seen anything else than virtual memory. -- Leonard "Par CU is" -- Leonard Norrgard, vinsci@ra.abo.fi, vinsci@finabo.bitnet, +358-21-6375762, EET.