A retro-inspired VDP built with Digital.
This is a VDP built from scratch in a visual way using a digital circuit simulator called Digital. This is then able to be exported to verilog or VHDL and that can be converted into a digital circuit that can run on an FPGA.
This VDP is designed to work with DVI over HDMI with a PMOD.
The circuit is a retro inspired Video Display Processor (VDP), sometimes also known as a Video Display Unit (VDU), or Picture Processing Unit (PPU). It's designed to work similarly to a late 80s graphics system like in the Commodore 64 / Amiga, or the various Nintendo or Sega consoles of that era.
- Displays to screen
- Palette lookups
- Line buffer
- Tile pixels
- Tile maps
- Sprite sheets
- Sprites
For the simulation, open dig/top_simvga.dig in Digital.
For the verilog version, install fusesoc and all the open source FPGA tools, then run make.
FuseSOC is used for building the project.
Contributions are welcome!
- Please follow the existing style and implement as much as possible in the Digital simulation rather than verilog.
- Fork and submit a PR
- I will be showing all contributions in youtube videos showing what you changed. I will give you credit unless you wish to be anonymous.
Only rj45 (so far)
This project is licensed under the MIT License - see the LICENSE file for details.
NOTE: The youtube videos do not fall under this license. They are under the standard youtube copyright, and I ask you not re-publish them elsewhere. You can create your own youtube videos with the content in this repo, however.