I'd like to use ISD51 to debug Atmel's chip AT89C51SND1C,but it can't work as the user guide'description. I can see the serial port work well through Hyperterminator.but I can't use single step or step over to break my program.So i ask two question: 1. does isd51 support this chip or not? 2. if yes ,can someone give me a sample using atmel's AT89C51SND1C? thanks!