Date   : Tue, 14 Mar 2006 20:52:57 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: 1MHZ SCSI/ATA board

Phil Blundell wrote:
> 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.

Drop me an email tomorrow during the day and I'll check my board (the 
machine's a bit too buried at the moment to get at this evening!). I need an 
excuse to photograph it anyway...

Wish I knew if they ever made any boards with '286-specific ROMs!