Hay, Arnold,

MC 68K was created in 1980 or thereabouts. We talked about 10's
of Megahertz, I think, in those times. I was involved (slightly) with the
Zilog Z80,000 which would have competed with the 68K, NS32K and the Intel
80386. Of the instruction sets (architectures) I was most happy with, the
Zilog 32-bit processor architecture was to me, the most minimalist and
thorough. At the time, I managed software development for the Zilog
company's Z8000 computers. It was a fun era. I bought a z8000 system and
developed a CRAY simulator on it when I left Zilog and went to work for
American Supercomputer Company (another interesting Silicon Valley story).

The 1980's were a very interesting time in Silicon Valley.

One of the saddest stories I recall is when "Eagle Computer" went public.
The CEO died on the IPO day after he had become a very rich person when he
crashed a Ferrari during a test drive. Eagle Computer died with the CEO.

Ed



On Wed, Feb 3, 2021 at 2:59 AM <arnold@skeeve.com> wrote:

> The 3B1 had an MC 68010.  I don't truly remember how fast the real
> system ran.  The emulated system seems to run more or less the same as
> the hardware did, taking my poor memory into account.
>
> The 5620 used the same processor as the 3B2, IIRC. There are emulators
> for both (maybe done by the same guy, I don't remember). I don't know
> of emulators for the 3B5 or 3B20.
>
> Arnold
>
> Ed Bradford <egbegb2@gmail.com> wrote:
>
> > It seems to me today's 2GHz processors should be able to emulate a 3B
> (*3B
> > or not 3B, that is the question*) at a performance that far exceeds an
> > actual 3B. Is the instruction set definition and architecture of a 3B
> > available anywhere?
> >
> > Just wondering. I did such emulations for 68K machines and Cray machines.
> >
> > Ed Bradford ex-BTL, ex Silcon Valley, and ex IBM retiree.
> >
> >
> > On Wed, Feb 3, 2021 at 2:00 AM <arnold@skeeve.com> wrote:
> >
> > > emanuel stiebler <emu@e-bbes.com> wrote:
> > >
> > > > On 2021-01-29 05:49, Arnold Robbins wrote:
> > > > > Hello All.
> > > > >
> > > > > I have made a pre-installed disk image available with a fair amount
> > > > > of software, see https://www.skeeve.com/3b1/.
> > > >
> > > > Thanks for doing & making the disk images, was an easy start!
> > >
> > > You're welcome. It's a fun side project. I think I finally get the
> > > enjoyment of retrocomputing with emulated versions of systems one
> > > used in one's youth. :-)
> > >
> > > > Do you remember, ho to set up the system to have four disk drives?
> > > >
> > > > Cheers & thanks again!
> > >
> > > I don't think it can support more than 2 drives. Certainly the emulator
> > > cannot. I don't know about real hardware.
> > >
> > > You can split a big drive into partitions when formatting with the
> > > diagnostics disk, but I don't think that's what you're asking.
> > >
> > > Sorry,
> > >
> > > Arnold
> > >
> >
> >
> > --
> > Advice is judged by results, not by intentions.
> >   Cicero
>


-- 
Advice is judged by results, not by intentions.
  Cicero