Intel MB875 - Manual (Page 60)

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
;[]===============================================