It's the EMM Computers board (www.homebrew8088.com). It's a little nicer than the PC-Retro because it has some concessions to modernity (PS/2 compatible keyboa

It's the EMM Computers board (www.homebrew8088.com). It's a little nicer than the PC-Retro because it has some concessions to modernity (PS/2 compatible keyboard port, ATX power connector and mounting design, uses a USB flash drive as boot medium) but there are some "work in progress" aspects (In the last few months, it's gone through a few hardware changes to make the speaker work and to support DMA) so there may be some compatibility holes.