Has anyone else built linux 2.4 for a 5k or 5kf core? When comparing cpu.h and the MIPS64 5K Processor Core Family Software Users Manual it doesn't look to me that the c0-config1 reg is defined the same way. Am I reading something wrong? For example in the spec FPU flag is bit0 while in cpu.h it is bit4. Seems pretty basic. David Kesselring Atmel MMC dkesselr@mmc.atmel.com 919-462-6587