Date   : Tue, 14 Mar 2006 20:27:00 +0000
From   : Phil Blundell <philb@...>
Subject: Re: 1MHZ SCSI/ATA board

Hi M.,

On Fri, 2006-03-10 at 16:23 +0000, Fragula wrote:
> BTW. I've secured another 34 off 41256 120nS. Awaiting delivery in a few
> weeks time, which I'll keep back for a while in case this is (as I
> suspect it might be due to the era and what was available if nothing
> else.) useable (possibly even overkill, depending on the clock rate) in
> your 80286 copro (you have a CPU for that?). I can probably lay hands on
> -100nS if really needed. If these are no good, let me know what is good,
> and I'll throw these open to general (old machine curator) takers. No
> panic. i'll expect them to arrive in early April.

Excellent.  Yeah, I think both (!) my 80286 boards have CPUs fitted;
they're just missing the RAM and ROMs.  I'm guessing that it wants 32
off 41256 for a total of 1MB, or 32 off 4164 for a total of 256K
(there's a jumper to select the RAM size).  Not sure what clock speed
they are running at, but 120ns sounds like a good bet to start with.  I
guess I can always fiddle the oscillator frequency downwards if the RAM
isn't fast enough.

p.