[Coco] 256K RAM chips

[N8WQ]

John and James,
Sorry for the delay in getting back to you guys.
Thanks for all the information on my memory chips.
I knew they wouldn't actually work in the CoCo 3 but I thought they 
might be able to be used in some other creative way.
It just seems a waste to through these chips in the trash. I will keep 
them until some creative project comes my way.

Before I forget I hope everyone on the list has a Happy New Year.

I finally got all my CoCo's out of storage but I forgot to get my color 
monitor! :)
I will get it on my next trip.

Alan Jones

-- 
N8WQ - Canal Winchester, Ohio
http://exwn8jef.googlepages.com/home
http://n8wq.blogspot.com



John Eric wrote:
> Those UM61-256K-15 are in fact 256Kbit, 32Kx8 Static CACHE RAM chips. I several tubes of those. You might could use them to make a battery backed RAM Cartridge (32K) ??? JE
>
>
>
>
> ________________________________
> From: "jdaggett at gate.net" <jdaggett at gate.net>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Saturday, December 27, 2008 7:54:31 PM
> Subject: Re: [Coco] 256K RAM chips
>
> On 24 Dec 2008 at 21:40, N8WQ wrote:
>
>   
>> Can you guys tell me if I might be able to use these memory chips in a
>> Color Computer 3 project? Any ideas?
>>
>> http://exwn8jef.googlepages.com/cocoprojects
>>
>> Alan Jones
>>     
>
>
> Not without some means of demultiplexing the memory address from the 
> Z-Buss. To achieve the 20 bit address you will need other logic and use the 
> RAS/CAS signals to convert the 10 bit multiplexed address to a 20 bit 
> address to use SRAMs. 
>
> james
>
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