ICP Electronics ROCKY-512, Руководство пользователя

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been set to 10 seconds, the I/O port 443H must be read within 7
seconds.
Note: When exiting a program it is necessary to disable the
Watchdog Timer, otherwise the system will reset.
Example Assembly Program:
TIMER_PORT = 443H
TIMER_START = 443H
TIMER_STOP = 843H
;;INITIAL TIME PERIOD COUNTER
MOV DX, TIME_PORT
MOV AL, 8: ;;8 SECONDS
OUT DX,AL
;;ADD YOUR APPLICATION HERE
MOV DX, TIMER_START
IN AL, DX. ;;START COUNTER
;;ADD YOUR APPLICATION HERE
W_LOOP:
MOV DX, TIMER_STOP
IN AL, DX
MOV DX, TIMER_START
IN AL, DX. ;;RESTART COUNTER
;;ADD YOUR APPLICATION HERE
CMP EXIT_AP, 0
JNE W_LOOP
MOV DX, TIMER_STOP
IN AL, DX
;;EXIT AP
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