KINO-DH110 Mini-ITX Motherboard
Page 122
NOTE:
The following discussion applies to DOS environment. Contact IEI support
or visit the IEI website for specific drivers for other operating systems.
The Watchdog Timer is provided to ensure that standalone systems can always recover
from catastrophic conditions that cause the CPU to crash. This condition may have
occurred by external EMIs or a software bug. When the CPU stops working correctly,
Watchdog Timer either performs a hardware reset (cold boot) or a Non-Maskable Interrupt
(NMI) to bring the system back to a known state.
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.
BL:
Time-out value (Its unit-second is dependent on the item “Watchdog
Timer unit select” in CMOS setup).
Table E-1: AH-6FH Sub-function
Call sub-function 2 to set the time-out period of Watchdog Timer first. If the time-out value
is not zero, the Watchdog Timer starts counting down. When the timer value reaches zero,
the system resets. To ensure that this reset condition does not occur, calling sub-function
2 must periodically refresh the Watchdog Timer. However, the watchdog timer is disabled
if the time-out value is set to zero.
A tolerance of at least 10% must be maintained to avoid unknown routines within the
operating system (DOS), such as disk I/O that can be very time-consuming.
Содержание KINO-DH110
Страница 14: ......
Страница 15: ...KINO DH110 Mini ITX Motherboard Page 1 Chapter 1 1 Introduction ...
Страница 24: ...KINO DH110 Mini ITX Motherboard Page 10 Chapter 2 2 Packing List ...
Страница 29: ...KINO DH110 Mini ITX Motherboard Page 15 Chapter 3 3 Connectors ...
Страница 31: ...KINO DH110 Mini ITX Motherboard Page 17 Figure 3 2 Peripheral Interface Connectors Solder Side ...
Страница 64: ...KINO DH110 Mini ITX Motherboard Page 50 Chapter 4 4 Installation ...
Страница 86: ...KINO DH110 Mini ITX Motherboard Page 72 Chapter 5 5 BIOS ...
Страница 125: ...KINO DH110 Mini ITX Motherboard Page 111 Appendix A A Regulatory Compliance ...
Страница 127: ...KINO DH110 Mini ITX Motherboard Page 113 B Product Disposal Appendix B ...
Страница 129: ...KINO DH110 Mini ITX Motherboard Page 115 Appendix C C BIOS Options ...
Страница 132: ...KINO DH110 Mini ITX Motherboard Page 118 Appendix D D Digital I O Interface ...
Страница 135: ...KINO DH110 Mini ITX Motherboard Page 121 Appendix E E Watchdog Timer ...
Страница 138: ...KINO DH110 Mini ITX Motherboard Page 124 Appendix F F Hazardous Materials Disclosure ...