Mystic FPGA project unlocks arcade and console gaming on DE25 Nano

The DE25 Nano has been an interesting FPGA board for a while, but for gaming it never had the same clear purpose as the DE10 Nano used by MiSTer. On paper, the hardware looked promising. In practice, though, differences in the board made a straightforward MiSTer port difficult. That’s now starting to change. A project called Mystic has brought the MiSTer-style framework to the DE25 Nano, and several familiar arcade and console cores are already running on it. That doesn’t suddenly make the DE25 Nano the new default choice for FPGA gaming, but it does make the board far more interesting than it was a few months ago.

Mystic gets MiSTer-style gaming running on the DE25 Nano

Mystic is essentially an adaptation of the MiSTer framework for the DE25 Nano. The important bit is simple: games are running. The first working cores include Capcom CPS1, CPS1.5 and CPS2, along with Nintendo Entertainment System and Game Boy support. That means titles such as Street Fighter Alpha 3, Alien vs Predator, Magic Sword, Street Fighter II: Champion Edition and Cadillacs and Dinosaurs can already run on the board.

NES and Game Boy games are working too. It’s still a small list compared with what you get on a mature MiSTer setup, but that’s not really the point yet. The big development is that these cores have been moved across successfully at all. That proves the DE25 Nano can now serve as a practical FPGA gaming machine instead of just sitting there with lots of unused potential.

The DE25 Nano has more hardware to work with

This is where things get interesting. The DE10 Nano offers around 110,000 logic elements. The DE25 Nano pushes that to roughly 138,000. It also uses DDR4 memory instead of DDR3.

Those numbers matter, but they don’t magically make games better. FPGA development doesn’t work like dropping a faster graphics card into a PC. A core still has to be adapted properly, tested and made to work with the hardware. Still, extra FPGA resources can help.

Some of the more demanding projects on MiSTer are already pushing close to the limits of the DE10 Nano. A larger FPGA gives developers more room to work, which could become useful for complicated arcade systems or experimental cores that currently sit near the edge of what existing hardware can handle.

There’s also the possibility that projects such as hybrid Dreamcast implementations could benefit from the additional logic and newer memory system. That’s still a possibility rather than a proven advantage, though. Mystic hasn’t reached the point where the DE25 Nano is clearly outperforming MiSTer in demanding real-world cores. Not yet.

Early testing looks good, with a few rough edges

The cores that are available appear to be running well. CPS2 games such as Street Fighter Alpha 3 were demonstrated in normal gameplay, and switching between arcade cores worked through the interface. Game Boy and NES titles were also running without any major gameplay problems. There are some quirks.

One HDMI capture setup had trouble when the CPS1 core was sent directly into an Elgato 4K capture device. Passing the signal through a Morph 4K processor fixed the problem. The DE25 Nano itself was generally being used as a 1080p device, so this looks more like an early compatibility issue than a fundamental problem with the platform.

That’s exactly the kind of thing you’d expect from a project at this stage. The core functionality is there, but there’s still plenty of testing to be done across different displays, capture hardware and controllers.

Game Boy support already includes display effects

Mystic isn’t limited to simply booting games. The Game Boy core includes display options such as the Brick Boy shader, which tries to recreate some of the visual behaviour of the original handheld LCD. That includes things like ghosting and image persistence. Other filters are available as well.

It’s a small feature in the bigger picture, but it shows that Mystic is already moving beyond bare-minimum compatibility. The familiar MiSTer approach of letting users adjust video output and display behaviour is starting to carry across to the DE25 Nano.

This isn’t a MiSTer replacement yet

That part needs to stay clear. MiSTer has a huge advantage because it already has years of development behind it. There are far more cores, far more testing and a much larger pool of known working configurations. Mystic is only getting started.

For someone who already owns a DE25 Nano, that’s still good news. A board that previously had limited use for MiSTer-style gaming can now run several major arcade platforms plus NES and Game Boy cores. That gives existing hardware a practical purpose straight away. Buying a DE25 Nano specifically for Mystic is a different question.

Right now, most of the working cores already run perfectly well on established MiSTer hardware. The DE25 Nano has stronger specifications, but those extra resources haven’t yet produced a big catalogue of exclusive or noticeably better cores. So there’s no need to rush.

Mystic gives the DE25 Nano a much clearer future

Mystic has already achieved the most important first step. It works. The DE25 Nano can now run a MiSTer-style FPGA gaming environment, load recognised console and arcade cores and behave like a usable gaming system rather than an experimental development board.

The hardware also gives developers more room than the DE10 Nano, with around 138,000 logic elements and DDR4 memory available. What happens next will matter more.

If more cores arrive and developers start using that extra FPGA space for systems that struggle on current MiSTer hardware, the DE25 Nano could become a genuinely different option rather than just another way to run the same games.

For now, Mystic is an early project with working software, promising hardware and plenty still to prove. That makes the DE25 Nano worth keeping an eye on, especially for anyone who already has one sitting unused.