![IEI Technology F15AD-H81i/PC-R10 Скачать руководство пользователя страница 181](http://html.mh-extra.com/html/iei-technology/f15ad-h81i-pc-r10/f15ad-h81i-pc-r10_user-manual_619460181.webp)
PPC-FxxA-H81 Panel PC
Page 166
NOTE:
The following discussion applies to DOS environment. IEI support is
contacted or the IEI website visited for specific drivers for more
sophisticated operating systems, e.g., Windows and Linux.
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 EMI 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 D-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. While 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 F15AD-H81i/PC-R10
Страница 16: ...PPC FxxA H81 Panel PC Page 1 1 Introduction Chapter 1 ...
Страница 22: ...PPC FxxA H81 Panel PC Page 7 Figure 1 4 Bottom View ...
Страница 25: ...PPC FxxA H81 Panel PC Page 10 1 8 2 PPC F17A H81 Dimensions Figure 1 8 PPC F17A H81 Dimensions mm ...
Страница 26: ...PPC FxxA H81 Panel PC Page 11 1 8 3 PPC F22A H81 Dimensions Figure 1 9 PPC F22A H81 Dimensions mm ...
Страница 27: ...PPC FxxA H81 Panel PC Page 12 1 8 4 PPC F24A H81 Dimensions Figure 1 10 PPC F24A H81 Dimensions mm ...
Страница 30: ...PPC FxxA H81 Panel PC Page 15 2 Unpacking Chapter 2 ...
Страница 34: ...PPC FxxA H81 Panel PC Page 19 3 Installation Chapter 3 ...
Страница 75: ...PPC FxxA H81 Panel PC Page 60 Chapter 4 4 System Maintenance ...
Страница 81: ...PPC FxxA H81 Panel PC Page 66 5 BIOS Setup Chapter 5 ...
Страница 119: ...PPC FxxA H81 Panel PC Page 104 6 Driver Installation Chapter 6 ...
Страница 148: ...PPC FxxA H81 Panel PC Page 133 7 Interface Connectors Chapter 7 ...
Страница 168: ...PPC FxxA H81 Panel PC Page 153 Appendix A A Regulatory Compliance ...
Страница 172: ...PPC FxxA H81 Panel PC Page 157 B BIOS Configuration Options Appendix B ...
Страница 175: ...PPC FxxA H81 Panel PC Page 160 C Safety Precautions Appendix C ...
Страница 180: ...PPC FxxA H81 Panel PC Page 165 D Watchdog Timer Appendix D ...
Страница 183: ...PPC FxxA H81 Panel PC Page 168 E Hazardous Materials Disclosure Appendix E ...