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APPENDIX
56 MB890 User’s Manual
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
;[]===============================================