On Thu, 22 May 2003, Tony Duell wrote:
Since you
mention it, I had been thinking about
designing and building a processor from scratch from
TTL devices. I am slowly accumulating TTL chips as I
It's not that hard. There have been several commercial 12 or 16 bit
processors built using appoximately 100 TTL packages (perhaps with some
small PROMs as control store too). Designing such a processor is not a
difficult job either...
I'd really like to design and build a PDP-8 clone, since the real
ones command such hefty prices on eBay. I've mostly given up on
getting my own 8/F or 8/M.
It's a simple enough architecture that it could be done without
too much trouble. And I'd have the benefit of being able to make
use of the exisiting library of PDP-8 software. The difficult
parts are a) knowing where to even begin, b) finding the time to
figure out how to do it, and c) finding the time to actually do it.
-brian.