[Coco] Replacing Dynamic RAM with Static RAM

[sales at gimechip.com]

Yes, that's what these were for, but I also uploaded a file that uses a 
256Kx16 SRAM for the CoCo3 for 512K. It needs a bit of work. It's here:
http://www.coco3.com/community/2010/06/512k-simm-and-sram-files


----- Original Message ----- 
From: "Stephen Adolph" <twospruces at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Friday, June 11, 2010 1:21 PM
Subject: Re: [Coco] Replacing Dynamic RAM with Static RAM


Interesting.
I've got a background activity thinking about how to use a single 2MB SRAM 
chip.
Seems that this is a way to replace each individual DRAM with an SRAM.

Similar, yet different. hmm more thinking.
Steve A


>> On 6/11/2010 8:57 AM, sales at gimechip.com wrote:

>>>

>>> Over the past year, I've had some success at replacing DRAM with SRAM. I

>>> have posted some of the schematics and designs to CoCo3.com in these

>>> threads:

>>>

>>> http://www.coco3.com/community/2010/05/512k-upgrade-question

>>>

>>>

>>> http://www.coco3.com/community/2010/06/4164-dram-sram-replacement-1-by-jr-of-gimechip-com

>>>

>>>

>>> http://www.coco3.com/community/2010/06/4164-dram-%E2%80%93-sram-replacement-2-by-jr-of-gimechip-com-c19-march-2010

>>>

>>> It is relatively simple to demultiplex the multiplexed address lines and

>>> to replace DRAM with SRAM. The above links should provide a great deal 

>>> of

>>> information on how I've gotten it to work.

>>>

>>> As soon as I get the rest of my documents together on the 512K, 1M& 2M

>>> CoCo 3 Static RAM upgrades, I'll get those posted as well. -J&R

>>>

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>>>

>>>

>>

>>

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