[Coco] Help on Breaking the 64KB Barrier on the Coco 2

Juan Castro jccyc1965 at gmail.com
Wed Jul 18 10:07:28 EDT 2012

Googling brought me some 1985 talk about an expansion called the

Anyone has more to say about this thingy?

On Wed, Jul 18, 2012 at 10:53 AM, Darren A <mechacoco at gmail.com> wrote:

> On Wed, Jul 18, 2012 at 3:15 AM, Kip Koon wrote:
> >
> > Is there a memory expansion upgrade available for the 64KB Coco 2?  I'd
> like to go beyond the 64KB barrier. I'd want it to be compatible with
> NitrOS-9 Level II.  I read somewhere on the internet that a different
> memory management scheme had been created for the COCO 1 & 2 that had a
> driver written for OS-9 that used some type of bank switching scheme.  Any
> thoughts?
> >
> I don't know if there is any OS-9 support for it, but Motorola's official
> MMU for the 6809 (the 6829) can be used to break the 64K barrier:
> <http://www.ebayitem.com/7521099658>

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