W65C265SXB - WDC Xxcelr8r Engineering Development System- Board featuring the W65C265S 8/16-bit Microcomputer 8/16-bit 65816 based Microcomputer (3.6864 MHz) on board with Twin Tone Generators, Timers, 4x UART, IO, Parallel Interface Bus 50 pin XBUS Expansion Connector with Address, Data, and Microprocessor control signals 3x8 IO Expansion Port Connectors 32KB External SRAM and 128KBytes External Socketed FLASH ROM Powered by USB (5V) for ease of connection to PC, MAC, Android Smartphone