Date   : Wed, 15 Mar 2006 15:49:50 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: 1MHZ SCSI/ATA board

Phil Blundell wrote:
> On Wed, 2006-03-15 at 14:08 +0000, Jules Richardson wrote:
>> Any idea what the Intel chip next to the CPU is? I presume it's some sort of 
>> clock generator, but I seem to recall not being able to find a datasheet when 
>> I was looking a few months back. 18 pin DIL, marked D82284 and 14340081.
> 
> Sounds like it's equivalent to the 82C284. :-}
> See, er...
> 
> http://www.classiccmp.org/pipermail/cctalk/2004-July/046241.html

haha :-)

That just shows how bad my memory is these days (and bad enough that I don't 
know where I filed the darn thing!)

>> Hmmm, I'm off to the States again on Friday for a while - when I get back
I'll 
>> give the chap a prod who used to own this board in Cambridge though, as he 
>> thought he might just have a few related bits of design docs in his loft.
> 
> Excellent.  Meantime I'll try equipping mine with some RAM, plus copies
> of the ROMs from the M512 board, and see if I can get it to do anything.

Be interesting to see about that - I was told that the 286 board got used for 
M512 development and so ended up with M512 ROMS, but I can't actually be 
certain that those weren't unmodified M512 ROMS!

I know my board was seen to initialise *once* in previous hands though, and 
that has ROMs with 'M512' written on them. I've got images of them, so if it 
turns out yours doesn't like whatever M512 ROMs you have then I can always 
send copies of mine over...

cheers

Jules