Avalue ESM-A50M - Manual (Page 82)

ESM-A50M
82 ESM-A50M Quick Installation Guide
Keep Current
Interrupt 19 Capture
Disabled[Default]
Enabled
Enabled: Allows Option ROMs to trap Int
19.
Boot option Priorities
These settings specify the boot priority of hard drive devices. The
highest priority device is displayed on the main Boot Option Priorities
list.
Hard Drive BBS Priorities
Use this setting to access the Hard Drive BBS Priorities submenu to
re-order or disable bootable hard drive devices.