Date   : Tue, 09 Aug 2005 23:37:23 +0100
From   : Rob <robert@...>
Subject: Re: 80186 co-pro

At 22:01 09/08/2005, Phil Blundell wrote:


>[snip- co pro based on WDC 14MHz 6502]


>Ah :-)
>
>If I was to go ahead and design a copro board for this, would anybody
>else be interested in one?  I'm guessing the cost for a full kit of
>parts would be somewhere in the region of £35.  There wouldn't be any
>fine-pitch SMD, so it should be easy to assemble by hand.


14MHz?  Count me in.  It looks like even a second hand acorn one on ebay 
will cost me as much, so might as well build a faster one!

Actually, in my quest to find a cheap 6502 2P, I was last night poring over
 
the circuit diagram & rom dumps of the acorn 6502 trying to decide if I 
could build one myself, but instead based on 6502+static ram+eeprom+??as 
tube and had decided I probably could, but it would cost me about that much
 
in parts, including a prototype board to build it on first, and I'd still 
need to find a tube ULA ..  And anyeway my circuit design skills are 
perhaps best described as basic... (I can hang TTL together such that 
things work, usually..)



Rob