Date   : Mon, 08 Aug 2005 19:44:10 +0100
From   : Phil Blundell <philb@...>
Subject: Re: 80186 co-pro

On Sun, 2005-08-07 at 11:17 +0100, Phil Blundell wrote:
> Another project I've wondered about occasionally would be building a
> high-speed 6502 second processor based on an FPGA and one of the
> synthesizable 6502 designs out there on the web.  I suppose one ought to
> be able to run this kind of thing at 20MHz or so, which might be cute.

So, a little bit of googling reveals that WDC actually sell a 65C02
variant that's rated for 14MHz at 5V:

http://www.westerndesigncenter.com/wdc/w65c02s.cfm

One of those, plus say a megabit of 15ns SRAM, would make a neat second
processor.  You'd just need to add a little boot ROM and a Tube ULA (or
CPLD emulation thereof), and you'd be in business.

p.