IMB-8550 User Manual
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 A
-
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.
A-2
IEI
®
Technology, Corp.
A-2
Содержание IMB-8550
Страница 13: ...IMB 8550 Chapter 1 Introduction 1 1 1 1 ...
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Страница 23: ...IMB 8550 Functional Description Chapter 2 2 1 2 1 ...
Страница 26: ...IMB 8550 User Manual Block Diagram Figure 2 1 IMB 8550 System Block Diagram 2 4 2 4 IEI Technology Corp ...
Страница 40: ...IMB 8550 User Manual Figure 2 8 CN3 Front Panel Connector 2 18 2 18 IEI Technology Corp ...
Страница 44: ...IMB 8550 User Manual Figure 2 10 IDE Connectors 2 22 2 22 IEI Technology Corp ...
Страница 46: ...IMB 8550 User Manual Figure 2 11 FDD1 Port 2 24 2 24 IEI Technology Corp ...
Страница 50: ...IMB 8550 User Manual Figure 2 14 LVDS LCD Panel Connection Port 2 28 2 28 IEI Technology Corp ...
Страница 54: ...IMB 8550 User Manual Figure 2 17 CN7 SPDIF Input 2 32 2 32 IEI Technology Corp ...
Страница 62: ...IMB 8550 User Manual This page is intentionally left blank 2 40 2 40 IEI Technology Corp ...
Страница 63: ...IMB 8550 Installation Chapter 3 3 1 3 1 ...
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Страница 85: ...IMB 8550 AMI BIOS Setup Chapter 4 4 1 4 1 ...
Страница 125: ...IMB 8550 Chapter 5 Software Drivers 5 1 ...
Страница 128: ...IMB 8550 User Manual When the InstallShield is loaded click on the Next button to proceed 5 4 IEI Technology Corp ...
Страница 141: ...IMB 8550 Watchdog Timer Appendix A A 1 A 1 ...
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Страница 145: ...ICPMB 8550 Address Mapping Appendix B B 1 B 1 ...
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Страница 149: ...PCIE 9450 ALi RAID for SATA Appendix C C 1 C 1 ...
Страница 161: ...IMB 8550 Index I 1 ...