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

[Boisy G. Pitre]

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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