W65C134SXB - WDC Xxcelr8r Engineering Development System - Board featuring the W65C134S 8-bit Microcomputer 8-bit 6502 based Microcomputer (3.6864 MHz) on board with WatchDog Timer, 1x UART, IO, Serial Interface Bus 40 pin XBUS Expansion Connector with Address, Data, and Microprocessor control signals 3x8 IO Expansion Port Connectors Serial Interface Bus connectors for Token Passing Local Area Network Powered by USB (5V) for ease of connection to PC, MAC, Android Smartphone