AFOLUX 915B Series Flat Panel PC
Page 128
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.
Summary of Contents for AFOLUX 915B Series
Page 1: ...AFOLUX 915B Series Flat Panel PC Page i AFL 915 series Flat Panel PC...
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Page 15: ...AFOLUX 915B Series Flat Panel PC Page 1 1 Introduction Chapter 1...
Page 21: ...AFOLUX 915B Series Flat Panel PC Page 7 Figure 1 5 Internal Overview...
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Page 23: ...AFOLUX 915B Series Flat Panel PC Page 9 2 Specifications Chapter 2...
Page 27: ...AFOLUX 915B Series Flat Panel PC Page 13 Figure 2 2 AFL 15B 915 Rear Dimensions units in mm...
Page 29: ...AFOLUX 915B Series Flat Panel PC Page 15 Figure 2 4 AFL 17B 915 Rear Dimensions units in mm...
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Page 45: ...AFOLUX 915B Series Flat Panel PC Page 31 3 Installation Chapter 3...
Page 69: ...AFOLUX 915B Series Flat Panel PC Page 55 4 System Maintenance Chapter 4...
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Page 79: ...AFOLUX 915B Series Flat Panel PC Page 65 5 AMI BIOS Setup Chapter 5...
Page 127: ...AFOLUX 915B Series Flat Panel PC Page 113 A Safety Precautions Appendix A...
Page 131: ...AFOLUX 915B Series Flat Panel PC Page 117 B BIOS Configuration Options Appendix B...
Page 135: ...AFOLUX 915B Series Flat Panel PC Page 121 C Software Drivers Appendix C...
Page 141: ...AFOLUX 915B Series Flat Panel PC Page 127 D Watchdog Timer Appendix D...
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Page 145: ...AFOLUX 915B Series Flat Panel PC Page 131 E Hazardous Materials Disclosure Appendix E...
Page 149: ...AFOLUX 915B Series Flat Panel PC Page 135 Index...