[Coco] Memory expansion

[Zippster]

Yeah, I don’t think it would be worth the effort to use small DRAMs.
A small, fast 512K SRAM can be had for just a few dollars and would
be much easier to interface.  One or more of those and a small CPLD
for the logic would be all you’d need.

That’s how I would do it, anyway…

- Ed


> On Aug 11, 2018, at 9:56 PM, RETRO Innovations <go4retro at go4retro.com> wrote:
> 
> On 8/11/2018 5:41 PM, Bill Gunshannon wrote:
>> Interesting.  So, how hard would it be to make one that took
>> 
>> 4164's?
> Probably not easy.  4164 is 65536x1 RAM.  You need 8 to do 64kB of RAM, and 64 of them to have 512kB
>> I was looking for some way to test memory chips and thought
> 
> Jim
> 
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