IEI Integration KINO-PVN-D4251_D5251 - Manual (Page 140)

KINO-PVN-D5251/D4251/ Mini ITX SBC
Page 126
Appendix
E
E Watchdog Timer
NOTE:
The following discussion applies to DOS. Contact IEI support or visit
the IEI website for drivers for other operating systems.
The Watchdog Timer is a hardware-based timer that attempts to restart the system when it
stops working. The system may stop working because of external EMI or software bugs.
The Watchdog Timer ensures that standalone systems like ATMs will automatically
attempt to restart in the case of system problems.
A BIOS function call (INT 15H) is used to control the Watchdog Timer.
INT 15H:
AH – 6FH Sub-function:
AL – 2: Sets the Watchdog Timer’s period.