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182
IEI
®
Technology, Corp
.
NOTE:
The following discussion applies to DOS environment. It is recommended
you contact IEI support or visit our website 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 will either perform 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 B-1: AH-6FH Sub-function
You have to 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 will start counting down. While the timer
value reaches zero, the system will reset. To ensure that this reset condition does not
occur, calling sub-function 2 must periodically refresh the Watchdog Timer. However, the
Watchdog timer will be disabled if you set the time-out value to be 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 NANO-LX
Страница 1: ...NANO LX CPU Card 1...
Страница 15: ...NANO LX CPU Card 15 1 Introduction Chapter 1...
Страница 21: ...NANO LX CPU Card 21 2 Detailed Specifications Chapter 2...
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Страница 35: ...NANO LX CPU Card 35 3 Connectors and Jumpers Chapter 3...
Страница 86: ...86 IEI Technology Corp THIS PAGE IS INTENTIONALLY LEFT BLANK...
Страница 87: ...NANO LX CPU Card 87 4 Installation and Configuration Chapter 4...
Страница 97: ...NANO LX CPU Card 97 5 Award BIOS Setup Chapter 5...
Страница 137: ...NANO LX CPU Card 137 Voltages The following voltages are monitored Vcore VccMem 3 3 V 5 V 12 V VBAT V 5VSB V...
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Страница 139: ...NANO LX CPU Card 139 6 Software Drivers Chapter 6...
Страница 153: ...NANO LX CPU Card 153 Figure 6 18 Access Windows Control Panel Step 2 Double click the System icon Figure 6 19...
Страница 162: ...162 IEI Technology Corp Figure 6 29 Restart the Computer...
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Страница 175: ...NANO LX CPU Card 175 A BIOS Configuration Options Appendix A...
Страница 179: ...NANO LX CPU Card 179 PCI VGA Palette Snoop Disabled 135 Fan Speeds 136 Voltages 137...
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Страница 181: ...NANO LX CPU Card 181 B Watchdog Timer Appendix B...
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Страница 185: ...NANO LX CPU Card 185 C Address Mapping Appendix C...
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Страница 189: ...NANO LX CPU Card 189 D External AC 97 Audio CODEC Appendix D...
Страница 195: ...NANO LX CPU Card 195 E ALi RAID for SATA Appendix E...
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Страница 207: ...NANO LX CPU Card 207 F Connecting an ATX Power Supply Appendix F...
Страница 211: ...NANO LX CPU Card 211 G Index...