Appears to be licensed under the GPLv3 and includes a bios. If that bios has sourcecode this is an interesting libre platform. IBM XT would lack a math coprocessor right? Being pre-486. And it would be a 16bit platform.
Might be possible to get an earlier edition of Minix working out of the box. Might in principle be able to support a μClinux port or a RetroBSD port.
That might be missing the point though, why not just boot it iwth FreeDOS?