Contec BX220 Series - Page 89

6. Appendix
80
BX-220 User’s manual
MOV DX,2EH
MOV AL,07H
OUT DX,AL
MOV DX,2FH
MOV AL,08H
OUT DX,AL
;--------------------------------------------------
;Set time of WDT and start to count down
;--------------------------------------------------
MOV DX,2EH
MOV AL,F1H
OUT DX,AL
MOV DX,2FH
;----------------------------------------------------------------------------------
;The data of an example is 15 seconds.(01H=1sec.- FFH=255sec.)
MOV AL,0FH ; 0FH = 15Sec.
;-----------------------------------------------------------------------------------
OUT DX,AL
;----------------------------------------
;Exit the extended function mode
;----------------------------------------
MOV DX,2EH
MOV AL,AAH
OUT DX,AL
;==============
;<WDT STOP>
;==============
;-----------------------------------------
;Enter the extended function mode
;-----------------------------------------
MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
;----------------------------------------------
;Select logical device WDT(number 8)
;----------------------------------------------
MOV DX,2EH
MOV AL,07H
OUT DX,AL
MOV DX,2FH
MOV AL,08H
OUT DX,AL
;-----------------------------------
;Stop count down of WDT
;-----------------------------------
MOV DX,2EH
MOV AL,F6H
OUT DX,AL
MOV DX,2FH