Date   : Wed, 15 Mar 2006 11:49:21 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: 1MHZ SCSI/ATA board

Phil Blundell wrote:
> On Tue, 2006-03-14 at 20:52 +0000, Jules Richardson wrote:
>> 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...
> 
> That'd be great.  Thanks!

Ok, DRAMs on mine are HM50256 at 150ns.

Your mention of the 4MHz clock speed's got me wondering - there's sign of 
extra soldering around the 12MHz crystal on my board, suggesting that it's 
been changed for some reason post-production.

Makes me wonder now if that's the root of the initialisation troubles with my 
board-  I'm speculating that someone may have tried upping the clock speed 
(the CPU's a 12MHz one too) and something on the board won't cope or there are 
all sorts of nasty timing issues going on.

I'll have to see if I have a lower speed 286 CPU kicking about (unless of 
course they can happily be underclocked without timing problems).

Are the crystals on your board(s) all 4MHz too then?

cheers

Jules