Path: utzoo!attcan!uunet!pyrdc!pyrnj!rutgers!bpa!drexel!jeff From: jeff@drexel.UUCP (Jeff White) Newsgroups: comp.sys.mac Subject: Re: Mac //x upgrade (price)? Summary: Is PMMU needed for 68030 (Mac IIx)? Message-ID: <766@drexel.UUCP> Date: 26 Sep 88 23:19:39 GMT References: <1797@uokmax.UUCP> <1057@lakesys.UUCP> Distribution: na Organization: Drexel University, Phila., Pa. Lines: 13 > 1) Currently available is a PMMU chip. This provides upgraded memory > management for the Mac II. Apple states that "the PMMU chip is required for > the A/UX operating system and will be used by future versions of the Macintosh > operating system." Do you need to purchase the PMMU if you have or are upgrading to a Mac IIx? I was under the impression that the 68030 had the memory management unit built in (like the 80386 chip does). If this is true, I don't know why Apple would list the PMMU as part of the upgrade path from a II to a IIx. Jeff White Drexel University - ECE Dept. rutgers!bpa!drexel!jeff