14 Aug
2006
14 Aug
'06
5:54 p.m.
On 8/15/06, Patrick Finnegan <pat at computer-refuge.org> wrote:
On Monday 14 August 2006 19:43, Ethan Dicks wrote:
32Kx8 are easy to find as old cache RAM. They are not, however, low
power, and would not be the best solution if you wanted to hang a
battery off of them. OTOH, unless you are using paper tape software
only, chances are you have a mass storage device and are booting into
OS/8 and don't really need battery backup.
-ethan
Why not use a pair of 62256s? 32Kx16 and ignore
4 bits. It'd even be
easy to use a Dallas DS1210 or something like it to provide battery
backup.
I'd probably do something like what the SBC-6120 does... use some typical 486
motherboard cache SRAM. Cheap, and relatively easy to find. :)
You'd end up with one or two chips to do 32k x 12.