Contec bx200 SERIES, Руководство пользователя

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6. Appendix
BX-2x0-DCxxxx, BX-2x0D-DCxxxx User’s manual
101
;===============
; WDT Close
;===============
CHK_CLOSE1:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JNZ CHK_CLOSE1
MOV DX,2A0H
MOV AL,AAH ;Close Command
OUT DX,AL
CHK_CLOSE2:
MOV
DX,2A4H
IN AL,DX
TEST AL,1 ;Check status of input
JZ CHK_CLOSE2
MOV DX,02A0H
IN AL,DX ;Close success if AL = 55H
;===============
; Set WDT Time & Set WDT Output<Initial>
;===============
CHK_CMD1:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JNZ CHK_CMD1
MOV DX,2A0H
MOV AL,98H ;Set WDT Time Command
OUT DX,AL
CHK_CMD2:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JZ CHK_CMD2
MOV DX,2A0H
MOV AL,0 ; AL= WDT Time MSB
OUT DX,AL ; IF AL=1 256Sec
CHK_CMD3:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JZ CHK_DI3