Date   : Sat, 10 Jul 2010 17:27:48 +0100
From   : robert@... (Rob)
Subject: Homemade SW-RAM

It's possible ... but you'll need to create some address decoding
logic to choose which chip to select based on A13.  It'd be much
easier if you could find a 62256 which would give you 32K SWRAM with
no extra components, just a couple of flying leads.

Rob


On 10 July 2010 16:53,  <walker_matt@...> wrote:
> I have 2 6264 chips (8kbit * 8) lying around, does anyone have any circuit
> diagrams for a 16KB sideways
> ram board I can make with few other components (decupling capacitors, logic
> gates etc) that plugs into a ROM socket?
>
> Another point, would 16KB more be any use? The B+ had 32KB more, with 20KB
> as shaddow RAM I think.
>
> One more thing, how would I make use of the sideways RAM?
>
>
> You can probably tell I'm not that experienced with BBCs! I had one when I
> was about 9, and have only recently decided I quite liked it.
>
>
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