dear all,
I already designing the AT89C52 system, but not resist with voltage transient, RFI, induction from motor and etc. I don't use the the AT89S52 with wdt, because I can't find the chip in my city.
To recover my program if something happen with my program (program jump in uncorrect address), I add program in the last address i.e:

ORG 1FF0H
MOV SP,#07H
LJMP 0000H

My question:
Is my program correct?
If not, how to recover program without using WDT if something happen with incorrect address causes by electrical like I describe above?

sorry Ican't speaking english well.

thank you verymuch.

hen.