by Radiona.org / Zagreb Makerspace

A powerful, open hardware ECP5 FPGA dev board

View all updates Mar 27, 2020

Taking DOS Gaming to the Next Level!

by Goran Mahovlić

In our first video update, we would like to share with you the possibilities for DOS-based retro gaming on ULX3S. The Disk Operating System (DOS) is a single user, single tasking, non-graphical, commandline operating system. It was introduced in 1981, but a little digital archeology allows it to live on inside your FPGA.

While you can still find DOS running on some computers today, the ULX3S version (freeDOS) gives you a compact, convenient platform with which way to revel in the glory of 8-bit pixels and tinker with retro games. Enjoy gaming classics like the Block Out, Dune, Arkanoid, Civilization, Kens, Lemmings, Tetris, Prince of Persia, Prehistorik, Budokan, and many other abandonware favorites.

It is thanks to the FPGA community that you can run DOS environments on ULX3S. The latest release of freeDOS not only supports having a BIOS image in the first sectors of an SD card, it also does a better job of handling the various ULX3S models. Thanks to FleaSystem, which has been ported to the Lattice ECP5, a Next186 core is available to provide a USB interface for mouse and keyboard support. EMARD made Next186 adaptable for ULX3S and kost made it easier to use by adding support for automatic builds and pre-made binaries.

Looking forward to sharing our next update!

The Radiona team

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Product Choices


Expansion Boards

A set of three expansion boards for ULX3S: one dual-USB board with support for IR send and receive, one Digital Video board for GPDI input or as a second GPDI output, and one OV7670 camera connector.


ULX3S with ECP5 12F

ULX3S development board with a Lattice ECP5 (LFE5U-12F-6BG381C) FPGA. 12k LUTs and a whole lot more.


ULX3S with ECP5 85F

ULX3S development board with a Lattice ECP5 (LFE5U-85F-6BG381C) FPGA. 84k LUTs and a whole lot more.


Radiona.org / Zagreb Makerspace

Radiona.org / Zagreb Makerspace works to enhance the visibility of makers' open source culture and sustainable production, as well as to help connect all possible fields of Science, Technology, Engineering, Art, and Mathematics (STEAM).


Marko Zec

Goran Mahovlić

Deborah Hustic

Damir Prizmić

Marko Jovanović

Boris Vidošević

Marvin Sinister

Igor Brkić

Mato Ilijic

Zvonimir Domazet



Components and Hardware Sourcing


Electrical Engineering

See Also

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