z386_MiSTer is an unofficial PC core for MiSTer built around z386, a new 80386-compatible CPU design. It currently behaves like a smaller ao486_MiSTer: 16 MB of RAM and roughly 75% of ao486_MiSTer's performance. The core is still experimental, but the goal is to keep improving it.
z386_MiSTer requires an SDRAM module. Unlike ao486_MiSTer, which uses DDR3, this core uses MiSTer SDRAM. The SDRAM XS-D v2.5 module is verified to work.
Download a build from the release page. Put MiSTer file in /media/fat (after backing up your existing MiSTer), z386_*.rbf in /media/fat/_Computer and boot0.rom, boot1.rom, game disk images (.vhd files) in /media/fat/games/Z386.
.