On Sun, May 25, 2008 at 8:23 AM, Bernd Petrovitsch <[EMAIL PROTECTED]> 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.
>
Bernd,

I think you have your history a little off. (I may too.)

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.

iirc, the DEC PDP computers were some of the first computers to have
UNIX on them.

Greg
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