[Coco] RAM expansion options for the CoCo 3

[William Carlin]

I believe that Ian Maverick from Australia is working up a design for 1
and/or 2 megabyte RAM expansions for the Color Computer 3.


William Carlin


On Tue, Apr 18, 2017 at 12:15 AM, Michael Brant <brant.michael.l at gmail.com>
wrote:

> Speaking of RAM expansion I seem to remember some one working on a 1 or 2
> meg expansion in recent times.  Who was that.
>
> On Apr 17, 2017 11:43 PM, "Arthur Flexser" <flexser at fiu.edu> wrote:
>
> > There was also a competitor to Big Basic, called maybe 512K Basic.  I
> > remember both being advertised in Rainbow.  (As an interesting historical
> > note, some years earlier there was a product called KEY264K for the CoCo
> > 1/2 that expanded the RAM that Basic could have available by switching
> > between the two 32K RAM banks of a 64K CoCo.)
> >
> > Art
> >
> > On Mon, Apr 17, 2017 at 11:05 PM, Sean <badfrog at gmail.com> wrote:
> >
> > > Sorry to bump a 6 day old reply, but I remember an ad and also a booth
> > at a
> > > Rainbowfest advertising "Big Basic", that could take more advantage of
> > more
> > > available RAM.  I don't remember any specifications other than being
> > > interested in it at the time, but seeing this thread rang a bell.
> > >
> > > On Tue, Apr 11, 2017 at 2:40 PM, Bruce W. Calkins <
> > > brucewcalkins at charter.net
> > > > wrote:
> > >
> > > > 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
> > > >>
> > > >>
> > > >
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