[Coco] My Coco1

[Mike Pepe]

Yes, that appears to be a 128k upgrade, and I didn't know those guys made a
128k version. The similarity is definitely there!

The 256k Banker would have the 74LS785 SAM and of course, 256k DRAM chips.

The design of the Banker did allow for a piggyback 512k option, which would
appear similar to this in appearance.

> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-
> bounces at maltedmedia.com] On Behalf Of Bruce W. Calkins
> Sent: Friday, June 21, 2013 6:31 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] My Coco1
> 
> My memory has that as piggybacked 64k chips for 128k or replacement chips
> at 256k.  I do not recall any 512k memory kits for the CoCo 1.2.  The
> Piggybacked 64k memory chips indicates the 128k J&R Banker.  FWIW; I have
> a copy of the 256k version.
> Bruce W.
> ====================
> 
> ----- Original Message -----
> From: "Bob Devries"
> 
> > That looks suspiciously like a BANKER memory board. This could
> > accomodate either 256k or 512k in banked blocks (32 or 64k) Hardware
> > description is in Hot Coco September 1985.
> >
> > Os9 drivers appeared in Feb? 1986 Rainbow mag.
> >
> > Regards, Bob Devries
> > Dalby, QLD, Australia
> >
> > ----- Original Message -----
> > From: "Bill" <cwgordon at carolina.rr.com>
> > To: "Coco Enthusiasts" <coco at maltedmedia.com>
> > Sent: Saturday, June 22, 2013 8:19 AM
> > Subject: [Coco] My Coco1
> >
> >
> >>I just opened up my Coco1, and found this:
> >>
> >>
> >>
> >> http://www.sq1bbs.com/inside.jpg and
> >> http://www.sq1bbs.com/inside1.jpg
> >>
> >>
> >>
> >> This coco1 has a swich and the button on the case, but they  are not
> >> connected to anything. It also has a strange add on board along with
> >> a extra 64k inside for a total of 128k.
> >>
> >>
> >>
> >> I have no idea how to access it. I wish I could contact the person
> >> who modified this machine.
> >>
> >>
> >>
> >> Anyone have any ideas?
> >>
> >>
> >>
> >> Thanks
> >>
> >>
> >>
> >>
> >> --
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> >> Coco at maltedmedia.com
> >> http://five.pairlist.net/mailman/listinfo/coco
> >
> >
> > --
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> > Coco at maltedmedia.com
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> 
> 
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