i have easypro 90B, it works fine on atmel at27c1024 plcc 44 pin package with plcc 44 to dip 40 pin adapter.
when i try to use with atmel at27c4096 plcc 44 pin with same adapter it does not work. i checked the addtional two address bus pins are connected properly.
i was slightly mistaken in my first question. programmer working fine with amd am27c1024 plcc package but is not working with atmel at27c1024 and at27c4096 plcc package.
i hope there is no difference in amd and atmel chips. how to verify if the adapter is bad??