Relay Computer

My journey in constructing an 8 bit relay computer from scratch ... made from of a ton of solder, wires, lights, relays, sweat, tears, swearing and money.

Memory Design (Part 1 of 2)

In my last post I explained my decision to use a ‘modern’ memory chip in my relay computer … I also alluded to there being...

03 Sep 2017   —  7 minute read

The problem with memory

It’s time, at last, to start looking at the design for the computer’s memory and this is a bit of a game changer as it’s...

18 Aug 2017   —  5 minute read

More Laser Cut Parts

I’ve nearly got the design for the memory cards done and ready to share but once that’s out the way it’ll be time to get...

06 Aug 2017   —  3 minute read

Incrementer Design

In my last post I covered the design of the 16-bit half adder which takes whatever value is currently on the address bus and increments...

17 Jul 2017   —  3 minute read

Register Design: Program Counter

It’s been a while since my last post … pretty much 10 months in fact … and I’d love to say I’ve been quietly working...

29 May 2017   —  5 minute read

Yet another diversion

It’s been a bit quiet on the relay computer front again for a while … well it is summer after all and there’s no point...

24 Jul 2016   —  2 minute read