Date   : Fri, 06 May 2011 08:05:23 -0500
From   : jules.richardson99@... (Jules Richardson)
Subject: SSDs for Beebs

John Kortink wrote:
> On Thu, 05 May 2011 14:59:53 -0500, Jules Richardson
> <jules.richardson99@...> wrote:
> 
>> John Kortink wrote:
>>> Mine (the oldest, most powerful, and best developed, but
>>> also the most expensive) 
>> Don't forget that PMS made a SSD for the beeb waaay back in the day - with 
>> a colossal 64KB of capacity. (I had one - but I don't recall if I still do; 
>> if so it's tucked away in overseas storage)
>>
>> There's some mention of it here:
>>
>>   http://telcontar.net/Misc/random/SRAM-drive.php
> 
> Surely you jest. That's just a (very small) RAM disc.
> Nothing that couldn't be done just as well with, say,
> the Master's extra internal memory.
> 
> Not solid state storage at all.

There's an internal battery to keep the memory contents alive without 
external power (hence it being branded on the case as "nonvolatile RAM 
module").

Retention time on battery alone was probably awful (memory is 8 x 
SRM2064C-15 ICs), but AFAIK it was still designed as a portable solid-state 
device (rather than something intended to just survive the occasional power 
glitch)

cheers

Jules