IEI Integration NOVA-PV-D4251_D5251 v1.01 - Manual (Page 175)

NOVA-PV-D5251/D4251 5.25" SBC
Page 161
NOTE:
When exiting a program it is necessary to disable the Watchdog Timer,
otherwise the system resets.
Example program:
; INITIAL TIMER PERIOD COUNTER
;
W_LOOP:
MOV AX, 6F02H ;setting the time-out value
MOV BL, 30H ;time-out value is 48 seconds
INT 15H
;
; ADD THE APPLICATION PROGRAM HERE
;
CMP EXIT_AP, 1 ;is the application over?
JNE W_LOOP ;No, restart the application
MOV AX, 6F02H ;disable Watchdog Timer
MOV BL, 0 ;
INT 15H
;
; EXIT ;