3 Feb
2021
3 Feb
'21
10:48 p.m.
The 3B1 ran at 10Mhz. Pretty common for the era on MC68010 type hardware.
Maybe I'll have to get mine out, fix it up to actually be runable again, and
compare.
I know the MFM drive kicked the bucket decades ago, and the hardware
MFM emulators just haven't come down to the price level where I'd just
go buy one or two.
The 3B2 is all the WE 32100 CPU
Seth Morabito wrote an emulator for the 3B2/DMD, and collects all the information about
3B2s here.
https://archives.loomcom.com/3b2/
On Wed, Feb 03, 2021 at 01:58:56AM -0700, arnold(a)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(a)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(a)skeeve.com> wrote:
>
> > emanuel stiebler <emu(a)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