Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uunet!easy!lron From: lron@easy.lrcd.com (Dwight Hubbard) Newsgroups: comp.sys.amiga.programmer Subject: Re: Hacking in a 68020 Message-ID: Date: 27 Jun 91 09:37:23 GMT References: <1991Jun24.215409.3740@csis.dit.csiro.au> Organization: You must be talking about someone else. Lines: 31 In article rkushner@sycom.UUCP (Ronald Kushner) writes: >lron@easy.lrcd.com (Dwight Hubbard) writes: >>In article <1991Jun24.215409.3740@csis.dit.csiro.au> dave@csis.dit.csiro.au (D >>>How difficult would it be to build a board with a 68020 and an MMU that >>>would drop into the CPU socket replacing the 68000? Ignore the >>>possibility of 32-bit memory, I just want the MMU capabilities. >>> >>>Can somebody please describe the problems I would face? A friend tells >>>me that its necessary to ensure adequate time for interleaved access >>>to the video ram; can anybody enlarge on this and any other problems.. >>> >>>An 030 would probably be easier but also more expensive. >> >>Well, if price is the determining factor wouldn't a 68010 be cheaper? > >A 68010 doesn't have the MMU he wants..... Neither does the 68020, but the 68010 if I remember right differs from the 68000 in that it can handle an MMU while the 68000 can't. >Doesn't the A2000 schematics show the 86 pin connector as a MMU slot?? Something like that, with like one or two signals missing that are available on the motherboard. Of course all the signals needed are at the CPU socket too :-) -- ---------------------------------------------------------------------- -Dwight Hubbard INTERNET: lron@easy.lrcd.com - -Kaneohe, Hawaii USENET : ...!uunet!easy!lron - - BIX : lron - ----------------------------------------------------------------------