3 Jul
2015
3 Jul
'15
7:11 p.m.
On 2015-07-03 8:09 PM, Glen Slick wrote:
On Jul 3, 2015 4:59 PM, "Johnny Billquist"
<bqt at update.uu.se> wrote:
Apollo is the classic example of using plain 68K (two).
I always associate it with Tandem:
http://www.hpl.hp.com/techreports/tandem/TR-86.2.pdf
--Toby
I find it hard to believe it was a plain 68K in there. That CPU have some
serious
issues that makes it close to impossible to implement virtual
memory or proper usermode protection.
(Yes, it can be done, but the amount of hardware
required means most did
not. I think SUN did it with their own MMU, and an extra
CPU in there.
Trying to remember who else - I seem to remember one other company who
actually used a plain 68K, and it was not Unisys.)