gKINO-V/R1000 SBC
Page 105
NOTE:
The following discussion applies to DOS. Contact IEI support or visit the IEI
website for drivers for other operating systems.
The Watchdog Timer is a hardware-based timer that attempts to restart the system when it
stops working. The system may stop working because of external EMI or software bugs.
The Watchdog Timer ensures that standalone systems like ATMs will automatically
attempt to restart in the case of system problems.
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.
Summary of Contents for gKINO-R1000 Series
Page 2: ...gKINO V R1000 SBC Page II Revision Date Version Changes September 1 2020 1 00 Initial release ...
Page 14: ......
Page 15: ...gKINO V R1000 SBC Page 1 Chapter 1 1 Introduction ...
Page 20: ...gKINO V R1000 SBC Page 6 Figure 1 4 gKINO R1000 Dimensions mm ...
Page 25: ...gKINO V R1000 SBC Page 11 Chapter 2 2 Unpacking ...
Page 29: ...gKINO V R1000 SBC Page 15 Chapter 3 3 Connectors ...
Page 64: ...gKINO V R1000 SBC Page 50 Chapter 4 4 Installation ...
Page 75: ...gKINO V R1000 SBC Page 61 Chapter 5 5 BIOS ...
Page 108: ...gKINO V R1000 SBC Page 94 Appendix A A Regulatory Compliance ...
Page 110: ...gKINO V R1000 SBC Page 96 B Product Disposal Appendix B ...
Page 112: ...gKINO V R1000 SBC Page 98 Appendix C C BIOS Menu Options ...
Page 115: ...gKINO V R1000 SBC Page 101 Appendix D D Digital I O Interface ...
Page 118: ...gKINO V R1000 SBC Page 104 Appendix E E Watchdog Timer ...
Page 121: ...gKINO V R1000 SBC Page 107 Appendix F F Error Beep Code ...
Page 123: ...gKINO V R1000 SBC Page 109 Appendix G G Hazardous Materials Disclosure ...
