Dfi LR100-N16D User Manual download pdf (Page 119)

119

Watchdog Timer

Appendix B - Watchdog Timer

Watchdog Timer

The following parameters are references for setting the time interval 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 ac-

cording to the time interval so that your system will continue to operate.

.model small

.386

;-------------------

;Port denation

;-------------------

SuperIo_CFG_Port EQU 2Eh ;Super I/O Cong port. (2Eh/4Eh)

SuperIo_DAT_Port EQU SuperIo_CFG_Port + 1

WDT_Counter EQU 10 ; 1 to 255 (Sec./Min), 0 means disabled

mSuperio_Enter_Cong Macro

mov dx, SuperIo_CFG_Port

mov al, 87h

out dx, al

NEWIODELAY

out dx, al

endM

mSuperio_Exit_Cong Macro

mov dx, SuperIo_CFG_Port

mov al, 0AAh

out dx, al

endM

mSuperio_GetSet_Reg Macro RegIndex, AndMask, OrValue

mov dx, SuperIo_CFG_Port

mov al, RegIndex

out dx, al

NEWIODELAY

mov dx, SuperIo_DAT_Port

in al, dx

NEWIODELAY

mov ah, al

and al, AndMask

or al, OrValue

out dx, al

NEWIODELAY

endM

mSuperio_Get_Reg Macro RegIndex

mov dx, SuperIo_CFG_Port

mov al, RegIndex

out dx, al

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Dfi LR100-N16D User Manual Page 119

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