This website is about my home-built CPU projects.

Please choose one of my projects, or continue with exploring the web ring:
TraNOR

2495 MOSFET transistors

TraNOR is the transistorized version of the MyNOR computer. It consists of 2495 transistors and 3 memory chips. No other ICs are used and like MyNOR, TraNOR has no ALU but uses a single NOR gate for all kinds of calculations. The computer can be clocked at up to 7 MHz. Software written for MyNOR runs also on TraNOR.

First working prototype: April 2021
My4TH

A FORTH computer system

"My fourth" is a computer that runs a Forth system that is compatible to the Forth 2012 standard. My design goal was to build the simplest computer possible, with a discrete CPU using as few gates and components as possible, running a FORTH operating system.
Since this computer has EEPROM memory and a built-in text editor, you can write your own Forth programs directly on this computer.

First working prototype: December 2022
MyNOR

One NOR gate is enough!

MyNOR is a real single board computer like Arduino & Co. but it has no CPU or MCU. The 8-bit CPU consists of only 15 logic chips. The special thing about this computer is that it has no ALU, but it uses only one (discrete) NOR gate for all computations. I have also developed some expansion boards. With the LCD expansion board it is even possible to play games with this little computer!

First working prototype: December 2019
MyCPU

A real 8-bit home computer

This was my first homebrewed CPU project. It is a full featured 8-bit computer system with VGA display and keyboard + mouse input. MyCPU has a DOS like operating system. I have written many programs for this computer, such as games, tools, an internet web server (http, ftp and telnet) and many more.

First working prototype: June 2000
MyCPU Compact

MyCPU on a single board

When I published MyCPU on the web, some people said that it would be much easier to put the logic into an FPGA. I was very annoyed by these people, because the point of MyCPU was its "discreteness". To silence these people, I built an FPGA version of MyCPU.

First working prototype: March 2010

Homebuilt CPUs WebRing

JavaScript by Qirien Dhaela

Join the ring?

To join the Homebuilt CPUs ring, drop Warren a line, mentioning your page's URL. He'll then add it to the list.
You will need to copy this code fragment into your page (or reference it.)
Note: The ring is chartered for projects that include a home-built CPU. It can emulate a commercial part, that′s OK. But actually using that commercial CPU doesn′t rate. Likewise, the project must have been at least partially built: pure paper designs don′t rate either. It can be built using any technology you like, from relays to FPGAs.

Contact me: Dennis Kuschel, dennis_k@freenet.de, www.mynor.org and www.mycpu.eu