Andrew, Attached is a simple charactor driver for possible inclusion in your MM tree. This driver is specific to the MPCBL0010 that will start shipping this fall. The telcom clock is a special circuit, line card PLL, that provids a mechanism for synchronization of specialized hardware across the backplane of a chassis of multiple computers with similar specail curcits. In this case the synchronization signals get routed to multiple places, typically to pins on expansion slots for hardware that knows what to do with this signal. (SONET, G.813, stratum 3...) and similar signaling applications found in telcom sites can use this type of thing. The actual device is hidden behind the FPGA on the motherboar, and is connected to the FPGA via I2C. This driver only talks to the FPGA registers. Thanks, -- --mgross BTW: This may or may not be the opinion of my employer, more likely not. ------------------------------------------------------- -- --mgross BTW: This may or may not be the opinion of my employer, more likely not.