RE: commodore 900 emulation ?

From: Didier Derny <>
Date: Sun, 11 Dec 2011 19:55:31 +0100
Message-ID: <000001ccb836$74cf28e0$5e6d7aa0$@org>
Any idea of the processor inside ?
I know it's a Z8000 but there were 2 version
After what I've heard :)

One too simple not really useful :(
One too complex and to buggy and finally useless :(

No idea of what is true / false.

Any dump of the roms ?

Any memory map ?

Any boot disk ?

I think I still have some books on the Z8000.

I indirectly discovered Unix and C with the commodore 900 :)
I was supposed to work on this machine..


-----Message d'origine-----
De :
[] De la part de Uffe Jakobsen
Envoyé : dimanche 11 décembre 2011 18:01
À :
Objet : Re: commodore 900 emulation ?

On 2011-12-10 15:00, Didier Derny wrote:
> Is there any commodore 900 emulation ?
> I’ve never seen one

Not as far as I know...

> Are there enough resources available…
> I saw a prototype of commodore 900 at the pet show 1984.
> It was inside a commodore 8000 box without screen…

As you propably know - it never came beyond the prototype stage.
The product was killed by Commodore in the fight (with Amiga) for 
production capacity - which was not unlimited - unfortunately.

But the CBM900 did get to the stage where it was pretty close to a 
product launch - it got its own casing looking quite similar to the one 
that A2000 later was shipped in.

The remaining prototypes and the documentation actually disagrees at 
some points - so it is difficult to say what is the most correct.

I only know of 4 prototypes units in the wild:

Bo Zimmerman has two units - one  workstation (hires) and one server 
(lowres) unit. They previously belonged to Claus Schönleber.

Home Computer Museum has one unit - I do not know if it is a workstation 
or a server unit.

And then there is the one (server unit) that we are currently restoring.

As far as I know there our unit is the only one that is able to power up 
right now.

PS: if anyone knows about more CBM 900 units and/or owners then please 
speak up.

/Uffe Jakobsen

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Received on 2011-12-11 19:00:03

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