The IDT77914 and IDT77915 are designed to provide stable reference platforms for evaluation, design, and production of a 155Mbps NIC. The IDT77914 provides a fiber media physical (PHY) interface; the 77915 supports Unshielded Twisted Pair, Category 5 (UTP-5) cabling. Otherwise identical, they both feature complete PCI-bus ATM NIC functionality, plugging directly into PCI bus expansion slots. COMPATIBILITY AND CONFIGURATION The board is designed for use in PCI systems, which may include PC compatibles, MIPS, Alpha, Windows NT systems, future PowerPC Macintosh systems, and so on. It supports the 32 bit, 33 MHz, 5V part of the PCI spec, although this also permits operation in a 64-bit, 33 MHz, 5V PCI slot. OVERVIEW