I use that board to "get friendly" with these processors (I just started with T89C...). Probably the same PCB where I used AT...53 will be possible to use with one of these newer, with a valuable option: remote SW updating, just to send HEX file to the customer. It's just try-worthy. And also that enormous program memory. My intension is actally to use the AT89C51RE2 - the one with 2k EEPROM.

As I am off now, tomorrow I'll see about this extra GND, because it looks, doesn't it, as it is missing the connection with GND !

Thanks anyway, Slobodan