[Coco] Memory expansion
brant.michael.l at gmail.com
Mon Aug 13 21:56:00 EDT 2018
Ed, that is what your super mega 16mb RAM board prototype did right?
On Mon, Aug 13, 2018, 9:50 PM Zippster <zippster278 at gmail.com> wrote:
> 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>
> > 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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