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.

Decoder Design: MOV-8, ALU & SETAB

In my last post I introduced the design for the instruction register which holds the current 8-bit opcode that the computer is executing. The next...

04 Jan 2015   —  4 minute read

Register Design: Instruction Register

Well, it’s fair to say that I rather underestimated just how much time decorating the new house would take up … and that’s mainly because...

01 Dec 2014   —  6 minute read

Sequencing & Control Design: Overview

I’ve now got my computer to a state where I can perform ALU operations and push values around the four registers by manually operating the...

19 Sep 2014   —  10 minute read

User Interface: Data Switches

Now I’ve got a fully working ALU and four registers completed I want to take a short break from card building and turn my attention...

05 Jul 2014   —  5 minute read