[Coco] Re: [Color Computer] Is this likely to work ?

[Glen VanDenBiggelaar]

Since you already have a battery backup, how hard would it be to through a 
"realtime Clock"? if you had a Cart with a Ram drive and a clock and it was 
cheap (under $20) itt hink you would have a real hit threre.
-Glen
>
>Boisy
>
>512K x8 is easy to do now via a cartridge.  A single 512Kx 55 nS
>sram is $10. Add a backup battery and you  have some more
>memory. Even the Dallas NVRAM with RTC is cheap compared to
>20 yrs ago.
>
>james
>
>On 6 Sep 2005 at 21:27, Boisy G. Pitre wrote:
>
>From:           	"Boisy G. Pitre" <boisy at boisypitre.com>
>Subject:        	Re: [Coco] Re: [Color Computer] Is this likely to work ?
>Date sent:      	Tue, 6 Sep 2005 21:27:35 -0500
>To:             	CoCoList for Color Computer Enthusiasts 
><coco at maltedmedia.com>
>Send reply to:  	CoCoList for Color Computer Enthusiasts 
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> >
> > On Sep 6, 2005, at 7:12 PM, Neil Morrison wrote:
> >
> >
> > >
> > > The question is why and what can be done with this memory? A more
> > > interesting project would be a combined RAM/ROM card to plug into
> > > the Multipak under OS-9 which would have, say, 1 Mb of ROM and 1 Mb
> > > of  RAM. With a driver OS-9 could use this to run even the
> > > C-Compiler in a fast  fashion.
> > >
> >
> > One thing that comes to mind from Phill's idea is a large RAM Disk.
> > There was a similar product back in the 80s for the CoCo 2, I believe
> > it was called the J&R Banker or something similar?
> >
> > Of course, a cartridge based battery-backup RAM disk would also be
> > nice.  CRC's Tony Distefano had a 256K and 512K model, and I myself
> > have the 512K one.  With today's RAM, you could easily support
> > megabytes of RAM space.
> >
> > The possibilities are fun and endless...
> >
> > Boisy
> >
> >
> > >
> > >
> > >> Hi,
> > >>
> > >> I am toying with the idea of developing some sort of expansion RAM
> > >> for the CoCo 1/2 & Dragons, basically the non-gime machines. I'm
> > >> just  trying to bounce the idea here to see if it is likley to
> > >> work.
> > >>
> > >> Looking at the circuit sheets for the Dragon & CoCo 1, it seems
> > >> that access to the RAM is mediated by the SAM, and the LS244 buffer
> > >> on the output of the RAM. Also reading the datasheet for the 4164
> > >> RAM  chip, it seems that /RAS is used as a chip enable to set it up
> > >> to be accessed.
> > >>  ....
> > >>
> > >>
> > >
> > >
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