MiSTer’s new z386 PC core brings experimental 80386 emulation to FPGA

MiSTer picked up a new experimental PC option with z386, an unofficial 80386-compatible core from nand2mario that already points to a broader practical gain: another x86 path for the platform, not just another proof of concept. The core was written mainly from January to April 2026 and is described by its author as an educational reconstruction, a usable MiSTer PC core, and a reusable embedded x86 CPU core. On a DE10-Nano, nand2mario’s benchmark table puts z386 at 85 MHz, 18K ALUTs, 5K registers, and 116K BRAM, compared with ao486’s 90 MHz, 21K ALUTs, 6.5K registers, and 131K BRAM. In DOOM, z386 is listed at 16.5 FPS versus 21.0 FPS for ao486.

That comparison matters because ao486 is already the familiar MiSTer PC baseline, a port of Aleksander Osman’s ao486 design that MiSTer documentation describes as a heavily reworked core with 486SX33-class performance without an FPU. z386 is not replacing that core, but it does widen the lane for people who want to see how far FPGA-based PC emulation can be pushed on the platform. The practical setup is also concrete: z386 requires a MiSTer SDRAM module, and the SDRAM XS-D v2.5 module is verified to work.

Arcade support kept moving too. Coin-Op Collection released Vapor Trail for MiSTer, bringing the Data East shooter into the platform’s arcade catalog with both 1-player and 2-player support intact. Coin-Op Collection uses its MiSTer repository as a distribution channel for FPGA implementations on the MiSTerFPGA platform, which makes this release part of an active preservation pipeline rather than a one-off novelty. Just as important, a Darius II / The Ninja Warriors MiSTer core reached its first public release on May 23, 2026, adding another recognizable arcade name to a library that increasingly looks less experimental and more complete.

The most visible sign that MiSTer is maturing as an all-in-one box came from Zaparoo. Zaparoo Frontend v1.0.3 and Core v2.13.0 landed on May 24, 2026, and v1.0.3 was explicitly billed as the CRT release. It added native 240p CRT output on MiSTer, a 240p-focused layout pass, list browsing with metadata and artwork, per-system launcher selection, arcade alternates, and improved mouse and screensaver behavior. Zaparoo Frontend runs on the MiSTer display, while Zaparoo Core handles scanning, launching, metadata, favorites, and token writing. Taken together, these updates push MiSTer beyond a pile of impressive cores and toward a setup that is easier to live with on a daily basis, especially if the goal is one box that boots, browses, and plays like real hardware should.