https://github.com/marceldobehere/goofy-cpu

a goofy 8 bit cpu
https://github.com/marceldobehere/goofy-cpu

assembly-language cpu cpu-simulator csharp custom-cpu instruction-set-architecture logisim-computer logisim-evolution microcode

Last synced: 7 days ago
JSON representation

a goofy 8 bit cpu

• Host: GitHub
• URL: https://github.com/marceldobehere/goofy-cpu
• Owner: marceldobehere
• License: agpl-3.0
• Created: 2024-03-29T19:43:25.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2024-05-08T21:17:38.000Z (5 months ago)
• Last Synced: 2024-05-08T22:29:40.788Z (5 months ago)
• Topics: assembly-language, cpu, cpu-simulator, csharp, custom-cpu, instruction-set-architecture, logisim-computer, logisim-evolution, microcode
• Language: C#
• Homepage:
• Size: 3.85 MB
• Stars: 4
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Goofy CPU

A custom 8 bit cpu I made in logisim evolution.

It is still very WIP but currently its ALIVEEEEEEEE!

I have also made a second, more silly version [here](/goofier/)!

And I have implemented the cpu in verilog [here](https://github.com/marceldobehere/goofy-cpu-verilog)!

## Instruction Set

The instructions can be found in the `plan.txt` file.

## Microcode

The cpus microcode is generated using a c# program I made.

It can be found in the `Microcode gen` folder.

## Developing

You can now write assembly and compile it for the cpu. The stuff can be found in the `asm` folder. 

You can compile an asm file (like `examples/inc_hlt.asm`) using `customasm.exe` and then use the generated output and load that into ram.

NOTE: You need to include the `common.asm` file for customasm to work properly!

NOTE: If you are not on windows, you will need to get customasm and then it should hopefully work too.

## Images/GIFs

![An image of the full cpu](./imgs/image.png)

![The cpu running a test program that adds 1 to the first register until it reaches 0x20](./imgs/cpu%20test%201.gif)

## Thanks to

* [Phoenix v2](https://github.com/Glowman554/phoenix-v2)

* [Customasm](https://github.com/hlorenzi/customasm)