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.