mov cl, 0F5h

APPENDIX

mov cl, 0F5h

 

call Read_Reg

 

and al, NOT 08h

 

call Write_Reg

;set count mode as second

pop ax

 

mov cl, 0F6h

 

call Write_Reg

;set watchdog timer

mov al, 01h

 

mov cl, 30h

 

call Write_Reg

;watchdog enabled

call Lock_Chip ret

Enable_And_Set_Watchdog Endp ;[]=============================================== ; Name : Disable_Watchdog

; IN : None

;OUT : None ;[]=============================================== Disable_Watchdog Proc Near

call Unlock_Chip

mov cl, 07h

 

mov al, 08h

 

call Write_Reg

;switch to LD8

xor al, al

 

mov cl, 0F6h

 

call Write_Reg

;clear watchdog timer

xor al, al

 

mov cl, 30h

 

call Write_Reg

;watchdog disabled

call Lock_Chip ret

Disable_Watchdog Endp ;[]===============================================

56

MB890 User’s Manual

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Intel MB890 user manual mov cl, 0F5h