The RBTX4925 is a TMPR4925Xb reference board that conforms to PCI bus specifications. RBTX4925 is equipped with a CPU, memory, Ethernet controller, RS-232 and PCMCIA and SmartMedia card slots.It also has a connector for installing an AC-link expansion board and a stacking connector that can interface with expansion I/O boards. RBTX4925 has a PCI card edge connector slot compatible with PCI cards that conform to 3.3 V specifications. There are two mode available for the PCI card edge: satellite mode for direct insertion into a PC, and the host mode that uses an internal/external arbiter. Switching between modes is achieved be settling a DIP switch on the board. The board isset to the host mode at shipment.