This wierd beast come with the catchy name "Coolmonster/s" from Kontron it's an EISA (Actually PISA) and carry a Pentium 266mmx, ethernet, audio and VGA.

I've been trying to run windows 98 on it but it seems like I'm havng problems with it.

Every kind of disk, CF to IDE, real IDE and SD to IDE above 500mb crashes any kind of boot device I throw at it, floppy, CDROM, even if the OS it's installed directly on the disk, but all it's working if I use under 500mb disks (I only tried CFs).
Even using 500mb partitions doesn't help and the weird thing is that the BIOS recognise it correctly, so, I have no idea.

Any insight?

Much appriciated