I got my circuit from this website, it says it is designed in 8 bit mode and I assume it is in 8 bit mode. It is displaying junk. My only concern is that im using the AT89C51AC2 training board and P1 or Port1 does not have 10k pull up resistors. P1 is the ADC input to the microcontroller and P0 is used as an output to the lcd.