Ian, Sorry I took so long to respond, I have been out of town. I designed a plug in board to upgrade the ROM slot to an EPROM but a quick look did not tune up any extras.
I am going to do a serious downsizing my collection and maybe we can work something out. Michael Holley 206 484 1181 -----Original Message----- From: cctalk [mailto:[email protected]] On Behalf Of Ian S. King Sent: Tuesday, October 04, 2016 8:28 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: mc68010+mc68451 Unix source? On Tue, Oct 4, 2016 at 3:14 PM, Al Kossow <[email protected]> wrote: > > > On 10/4/16 3:02 PM, Ken Seefried wrote: > > > Dumb question...did the '451 have a mechanism to work around the > > instruction restart issue in the 68000? > > no. the 68451 is a segmented mmu, so you wouldn't use it for demand > paging. the normal way you use it in unix is setting up segents for > text, data, and bss > > > > I remember reading the spec sheets for a MMU of that type - for the 6809! That was one versatile little processor. -- Ian S. King, MSIS, MSCS, Ph.D. Candidate The Information School <http://ischool.uw.edu> Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical Narrative Through a Design Lens Archivist, Voices From the Rwanda Tribunal <http://tribunalvoices.org> Value Sensitive Design Research Lab <http://vsdesign.org> University of Washington There is an old Vulcan saying: "Only Nixon could go to China."
