Building an Acorn System 1 - Main Index Page

This is my Acorn System 1 project index page. Hopefully this page will make it easier for you to find specific pieces of information on this ongoing project.
This gave me two A4 sized pictures that I could use to help follow the actual tracks around. It took awhile and some tracks are obscured under IC's and other components but I eventually traced every track, compared it to, and corrected the schematic accordingly. 

I ended up with a couple of schematics for the CPU and keypad card that seemed to be correct.

​
The original series of articles that explain how the project was started, going from incomplete schematics to fully working CPU and Keypad. 
How the project was started and reverse engineering the original PCBs and poor quality schematics to create new versions using modern and available components. 
Assembling and debugging the first versions of the new PCBs.
First CPU board tests.
Fixing a problems with addressing memory and more information about the updates that I've made from the original design.
Building a mini 3-slot backplane for testing multiple boards. 
Replacing the legacy INS8514 chip
Testing the replacement for the INS8514
This page contains all the current plans for this project including PCB foils, schematics, firmware, laser cutter files and anything else that may be useful. 
Details of the various key pad designs and how to construct the final version with the Acorn original looking key caps
A simple output card that can display a single byte of data on 8 x LEDs. 
The Segment Address Decoder board. This expansion board is designed to reduce the burden on other expansion boards to do all the address decoding themselves. Saves on board space and duplicated electronics.