ROHS EmCORE-i2702, User Manual

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Appendix
Item Address Description
1 00000h-9FFFFh DOS Kernel Area
2 A0000h, BFFFFh EGA and VGA Video Buffer (128KB)
C00000h - CFFFFh EGA/VGA ROM
D0000h - DFFFFh Adaptor ROM
E00000h - FFFFFh System BIOS
4.3 BIOS memory mapping
4.4 Watchdog Timer (WDT) Setting
WDT is widely used for industry application to monitoring the activity of CPU.
Application software depends on its requirement to trigger WDT with ad-
equate timer setting. Before WDT time out, the functional normal system will
reload the WDT. The WDT never time out for a normal system. Then, WDT
will time out and reset the system automatically to avoid abnormal operation.
This board supports 2 levels watchdog timer by software programming.
/*----- Include Header Area -----*/
#include "math.h"
#include "stdio.h"
#include "dos.h"
/*----- routing, sub-routing -----*/
void main()
{
printf(" ITE 8718F WatchDog timer tester Ver:0.1 \n");
printf(" Warning: This tools is test only. \n");
outportb(0x2e, 0x87); /* Start initial config port */
outportb(0x2e, 0x01); /* */
outportb(0x2e, 0x); /* */
outportb(0x2e, 0x55); /* End of initial Config Port*/