ADLINK Technology NuPRO-720, Руководство пользователя

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48 Watch Dog Timer
The example shown below resets the system after 15 seconds.
Both keyboard and mouse interrupts will reload the WDT from
CRF6.
begin:
;———————————————————————————————————————————————
; Enter extended function mode, interrupt double-write
;———————————————————————————————————————————————
mov dx,2Eh
mov al,87h
out dx,al
out dx,al
mov dx,2Eh
mov al,2bh ;CR2B, bit4 -> 0 = WDTO
;bit4 -> 1 = GP24
out dx,al
mov dx,2Fh
mov al,0C0h
out dx,al
mov dx,2Eh
mov al,07h
out dx,al
mov dx,2Fh
mov al,08h ;device 8
out dx,al
mov dx,2Eh
mov al,30h
out dx,al
mov dx,2Fh
mov al,01h ;enable device 8
out dx,al
mov dx,2Eh
mov al,0F7h
out dx,al ;device 8, CRF7
mov dx,2Fh
mov al,0C0h
out dx,al
mov dx,2Eh
mov al,0F5h ;device 8, CRF5