On 11/05/2010 2:29 PM, Mike Raiford wrote:
>
> Actually, in the vein of computer science: For the fun of it I'm
> designing CPU from scratch. I plan to build it with TTL gates


Feck! About 35 years ago I built a digital clock out of TTL. It used 30 
amps at 5 volts Vcc. The power supply was bigger than a modern PC.


> Eventually, I want to take a simplified version of that design and
> create a CPU entirely out of relays.

You are mad, you know ;-)

>
> One consideration for the relay version is that the machine should be
> able to halt and only resume processing on an interrupt. So, ideally,
> you'd give it inputs, issue a command, and send it clacking away to get
> a result.

Does your wife know about this ?


> The TTL version should be fun, too. I plan to have lots of LEDs to show
> what's happening inside the machine.

I hope that you have comprehensive fire insurance :-P



BTW let us know how you get on. :-)


-- 

Best Regards,
	Stephen

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