Contec bx200 SERIES, User Manual

Page: 109 / 115

6. Appendix
102
BX-2x0-DCxxxx, BX-2x0D-DCxxxx User’s manual
MOV DX,2A0H
MOV AL,0FH ; AL= WDT Time LSB
OUT DX,AL ; AL=F 15Sec
CHK_RES1:
MOV
DX,2A4H
IN AL,DX
TEST AL,1 ;Check status of input
JZ CHK_RES1
MOV DX,2A0H
IN AL,DX ; Retrun Data = 98H
CHK_CMD4:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JZ CHK_DI4
MOV DX,2A0H
MOV AL,9bH ; Set WDT Function
OUT DX,AL
CHK_CMD5:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JZ CHK_DI5
MOV DX,2A0H
MOV AL,00H ; AL=0:Reset,10h:PO2->L,20h:PO2->H,30h: Assert SCI
OUT DX,AL
CHK_RES2:
MOV
DX,2A4H
IN AL,DX
TEST AL,1 ;Check status of input
JZ CHK_RES2
MOV DX,2A0H
IN AL,DX ; Retrun Data = 9bH
;================================
;<WDT START : counter start or restart >
;================================
CHK_CMD6:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JZ CHK_CMD6
MOV DX,2A0H
MOV AL,99H ; 99h WDT Start Command
OUT DX,AL ;
CHK_RES3:
MOV
DX,2A4H