Intel MB890 user manual 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