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

Darren A mechacoco at gmail.com
Wed Jul 18 09:53:06 EDT 2012

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



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