Casio HK1223 - Manual (Page 101)

Setup Configuration Utility (SCU) 5-11
Boot Menu
Boot Sequence
Sets the first, second, third, and fourth booting device. The system will
try to boot from the first device but if it is not available, will try the next
boot device. If you set the first boot device to LAN Boot, the system will
boot from the LAN server first. The options are Hard Disk Drive,
CD-ROM Drive, Floppy Disk Drive, and LAN Boot. The default setting is
Floppy Disk Drive, Hard Disk Drive, CD-ROM Drive, then LAN Boot.
NOTE: If you set all booting options to the same device, then the computer will try to
boot from that device only.