DFI NP905-B16C - Manual (Page 122)

122
A
Watchdog Timer
Appendix A - Watchdog Timer
Watchdog Timer
The following parameters are references for setting the time inter-
val of the Watchdog Timer function. The system will regularly be
“cleared” according to the set time interval. If the system hangs or
fails to function, it will also reset according to the time interval so
that your system will continue to operate.
.model small
.386
;-------------------
;Port defination
;-------------------
SuperIo_CFG_Port EQU 2Eh ;Super I/O Config port. (2Eh/4Eh)
SuperIo_DAT_Port EQU SuperIo_CFG_Port + 1
WDT_Counter EQU 10 ; 1 to 255 (Sec./Min), 0 means disa-
bled
mSuperio_Enter_Config Macro
mov
dx, SuperIo_CFG_Port
mov al, 87h
out dx, al
NEWIODELAY
out
dx, al
endM
mSuperio_Exit_Config Macro
mov
dx, SuperIo_CFG_Port
mov al, 0AAh
out dx, al
endM