I've created many, many DOS boot disks (USB sticks, etc) but my Supermicro X9SCM-F refuses to boot to any of them. More specifically, what happens is that I get a blinking cursor in the upper-left of my screen. I've tried using different USB stick tools (Rufus) and I've even formatted a SATA drive as FAT16 and copied the MS-DOS boot files but it does the same thing... (blinking cursor) What am I doing wrong? I can't find any options in the BIOS to enable "Legacy BIOS" or anything like that...