Practical Electronics CHAMP/Tangerine Microtan 65

From: Brian Chase <>
Date: Fri May 23 03:16:00 2003

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.

Received on Fri May 23 2003 - 03:16:00 BST

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