https://github.com/alshapton/sphere1.cpu-2
CPU/2 Board schematics and documentation
https://github.com/alshapton/sphere1.cpu-2
Last synced: 6 months ago
JSON representation
CPU/2 Board schematics and documentation
- Host: GitHub
- URL: https://github.com/alshapton/sphere1.cpu-2
- Owner: alshapton
- Created: 2023-08-20T21:11:32.000Z (almost 3 years ago)
- Default Branch: main
- Last Pushed: 2024-04-02T10:33:17.000Z (over 2 years ago)
- Last Synced: 2025-07-27T18:55:37.333Z (about 1 year ago)
- Language: HTML
- Size: 188 MB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
![Sphere-1 Corporation][sphere-corporation-logo]
![CPU/2][cpu2-module-picture]
A 21st Century recreation of the Sphere-1 CPU/2 Module
Table of Contents
## About The Project
My journey into the Sphere started in March 2023, when I came across the interesting computer "Sphere 1" produced and marketed from Bountiful, Utah, beginning around 1975.
I found this reference on a [Hackaday page](https://hackaday.com/2023/03/11/a-love-letter-to-the-sphere-computer/), which led me to Ben Zott's fantastic resource "http://sphere.computer”
With an interest in retro computing, but a very elementary electronics knowledge, I decided that I had to build one, as no-one had attempted to re-create one from scratch since the original build days.
The main issue is that the documentation is sparse, with the computers even sparser!
This is the story of how I got on, my trials and tribulations and (hopefully) in time, the results of my labours.
### Built With
[![KiCAD][kicad-logo]][KiCAD]
## Contributing
Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are **greatly appreciated**.
If you have a suggestion or a resource that would help me, or perhaps you see something I've got wrong, please create an Issue.
## Contact
eMail [Andrew Shapton](mailto:alshapton@gmail.com)
## Acknowledgments
I have to give my heartfelt thanks to Ben Zott, who has been a sounding board for me throughout this project, answering my emails, and checking his Sphere-1 CPU/2 board to answer questions, and offering thoughts as to why things “were like they were” ! Without him, I would never have got as far as I have.
[sphere-corporation-logo]: sphere-corporation.png
[cpu2-module-picture]:cpu2-module-picture.png
[kicad-logo]: data:image/png;base64,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
[KiCAD]: https://kicad.org/