Iei-integration AFL-W10A-N270 v2.13 User Manual Page 138
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AFL-W10A-N270 User Manual
Page 138
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 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.
- AFL-W10A-N270 1
- Revision 2
- Copyright 3
- Table of Contents 4
- List of Figures 8
- List of Tables 10
- BIOS Menus 11
- 1 Introduction 12
- 1.2 External Overview 14
- 1.3 Internal Overview 17
- 1.4 System Specifications 17
- Page 18 18
- 1.5 Dimensions 19
- Page 20 20
- 2 Installation 21
- 2.1 Unpack the Panel PC 22
- 2.2 Removing the Rear Panel 26
- 2.3 CF Card Installation 27
- Page 28 28
- 2.4 AT/ATX Mode Selection 29
- 2.5.4 COM Port Pin 9 Select 33
- Page 36 36
- 2.6 Mounting the System 38
- 2.6.1 Wall Mounting 39
- 2.6.2 Panel Mounting 41
- Page 42 42
- Page 44 44
- 2.7 Bottom Panel Connectors 46
- Page 48 48
- 2.8 Power Connection 49
- 2.9 Driver Installation 50
- 3 System Maintenance 51
- 3.2 Motherboard Replacement 53
- 3.3 Cover Removal 53
- Page 54 54
- 3.5 CF Card Replacement 56
- 3.6 Reinstalling the Covers 56
- 4 BIOS Options 57
- 4.1 Introduction 58
- Page 60 60
- 4.3 Advanced 61
- Page 62 62
- 4.3.1 CPU Configuration 62
- 4.3.2 IDE Configuration 63
- Page 64 64
- DEFAULT 70
- Page 72 72
- Page 74 74
- 4.3.5 Power Configuration 75
- 4.3.7 Remote Configuration 79
- Page 80 80
- 4.4 PCI/PnP 83
- 4.5 Boot 86
- 4.6 Security 88
- 4.7 Chipset 89
- Page 92 92
- 4.8 Exit 94
- A Safety Precautions 96
- A.1 Safety Precautions 97
- AFL-W10A-N270 User Manual 100
- Page 100 100
- A.2.2 Cleaning Tools 100
- B One Key Recovery 101
- Page 102 102
- Page 106 106
- B.2.2 Create Partitions 106
- Page 107 107
- Page 108 108
- Page 110 110
- Page 111 111
- 75Figure B-10), press 112
- 75Figure B-11) 112
- 75Figure B-15 114
- Page 116 116
- Page 117 117
- 75Figure B-23). The 118
- B.4 Recovery Tool Functions 120
- 75B.2.5 121
- Page 123 123
- B.4.2 Backup System 123
- Page 124 124
- Page 125 125
- B.4.4 Manual 125
- B.5 Other Information 126
- Page 127 127
- 75B.2.2 Create 128
- D Terminology 133
- Page 134 134
- Page 135 135
- Page 136 136
- E Watchdog Timer 137
- Page 138 138
- NOTE: 138
- F Hazardous Materials 140
- Disclosure 140
- Mercury 141
- Page 142 142
- Page 143 143
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