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POC-3174B-A330 Medical Panel PC
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 POC-3174B-A330
Page 1: ...Page I POC 3174B A330 Medical Panel PC POC 3174B A330 Medical Panel PC ...
Page 17: ...Page 1 POC 3174B A330 Medical Panel PC 1 Introduction Chapter 1 ...
Page 26: ...Page 10 POC 3174B A330 Medical Panel PC 2 Specifications Chapter 2 ...
Page 37: ...Page 21 POC 3174B A330 Medical Panel PC Figure 2 14 UPS Battery Mode Switch ...
Page 40: ...Page 24 POC 3174B A330 Medical Panel PC 3 Unpacking Chapter 3 ...
Page 43: ...Page 27 POC 3174B A330 Medical Panel PC 4 Installation Chapter 4 ...
Page 62: ...Page 46 POC 3174B A330 Medical Panel PC 5 System Maintenance Chapter 5 ...
Page 72: ...Page 56 POC 3174B A330 Medical Panel PC 6 AMI BIOS Setup Chapter 6 ...
Page 117: ...Page 101 POC 3174B A330 Medical Panel PC Chapter 7 7 Software Drivers ...
Page 141: ...Page 125 POC 3174B A330 Medical Panel PC 8 Battery Monitoring and Remote Control Chapter 8 ...
Page 156: ...Page 140 POC 3174B A330 Medical Panel PC A System Specifications Appendix A ...
Page 162: ...Page 146 POC 3174B A330 Medical Panel PC B Safety Precautions Appendix B ...
Page 168: ...Page 152 POC 3174B A330 Medical Panel PC C BIOS Configuration Options Appendix C ...
Page 173: ...Page 157 POC 3174B A330 Medical Panel PC D Watchdog Timer Appendix D ...
Page 176: ...Page 160 POC 3174B A330 Medical Panel PC E Hazardous Materials Disclosure Appendix E ...
Page 180: ...Page 164 POC 3174B A330 Medical Panel PC F International Standards Compliance Appendix F ...
Page 183: ...Page 167 POC 3174B A330 Medical Panel PC Index ...