Board identification and version number (base address + 15)

When the page register address (base + 8) is set to ‘00H’, (default setting on power up), the read-only register address (base + 15) returns the value 0AH if the board is in 8-bit mode, or 09H if the board is in 16-bit mode. When the page register address (base + 8) is set to ‘02H’, the register address (base + 15) returns the board functionality version number.