[Coco] RAM expansion options for the CoCo 3

[Bruce W. Calkins]

DECB supports 32k of RAM with little ability to effectively use the 
extra 128 or 512k.  OS-9  Level 2 shines with more RAM. Currently no one 
is supporting greater than 512k upgrades.  To the best of my knowledge 
Cloud-9 is the only source of new 512k upgrades.  (Unless you are 
willing to piggy-back 256k by 4 chips yourself.)  Disto/CRC 1 & 2 Meg 
upgrades existed, but the hardware was somewhat kludgey needing 
modifications to some DECB programs and tweaking of OS-9 to work as well 
as unsoldering the CPU.  NitrOS9 does support 1& 2 Meg units, but 
Disto/CRC folded up shop decades ago.  What few 1 & 2 Meg upgrade units 
that exist are seldom parted with and carry quite a premium on eBay.

Bruce W.



On 04/11/2017 12:40 PM, Salvador Garcia via Coco wrote:
> Hi all,
> What RAM expansion options are there for the CoCo 3 and why would I pick one over the other?
> I know that Cloud-0 is distributing the Triad, a 512K RAM expansion. Is this capacity the better choice for DECB? For NitrOS9?
> I have heard of the 2MB RAM expansion, but I don't have any information about it to consider it.
>
> I favor the Triad, but want to make sure that I get the best option for what I need (DECB and NitrOS9).
> Thanks! Salvador
>