On Sun, 2008-05-25 at 11:26 -0400, Greg Freemyer wrote: > On Sun, May 25, 2008 at 8:23 AM, Bernd Petrovitsch <bernd@xxxxxxxxx> wrote: > > On Sat, 2008-05-24 at 15:39 -0400, Greg Freemyer wrote: > > [....] > >> I also think it is useful to realize that UNIX was basically designed > >> for systems that have a MMU even though low-end systems in the late > >> 70s / early 80s did not have them. > > > > The first ones (also before) didn't have a MMU and the first versions of > > "Unix" ran on it. > > > >> I believe there were implementations that ran on 286 based hardware > >> without MMUs way back then, but they were very kludgy and definately > >> not the design target for UNIX. > > > > Of course they were as that was common hardware in the 60s and > > (earlier?) 70s. > > I think you have your history a little off. (I may too.) Maybe. > Per Wikipedia: > > The Intel's 286[1], introduced on February 1, 1982, (originally named > 80286, and also called iAPX 286 in the programmer's manual) was an x86 > 16-bit microprocessor with 134,000 transistors. And that didn't have a MMU. MMUs came to the PC world with the 80386 > iirc, the DEC PDP computers were some of the first computers to have > UNIX on them. Yup. http://en.wikipedia.org/wiki/PDP-7 in '65. I don't think it had an MMU. Nothing to be found around the above page about that (at least by me). Bernd -- Firmix Software GmbH http://www.firmix.at/ mobil: +43 664 4416156 fax: +43 1 7890849-55 Embedded Linux Development and Services -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
