This document constitutes the user manual for the YAMON™ ROM monitor. YAMON (“Yet Another MONitor”) is the ROM monitor used on MIPS Technologies evaluation and reference boards. The target audience for this document is users of those boards. This would typically be engineers developing hardware or software including compilers, RTOS and other tools. Currently, the following boards/CPUs are supported by YAMON : • Atlas™ with MIPS32 4K™ or MIPS64 5K™ class of CPUs. • Atlas with QED RM5261® . • Malta™ with MIPS32 4K or MIPS64 5K class of CPUs. • Malta with QED RM5261® . • SEAD™ with MIPS32 4K or MIPS64 5K class of CPUs. • SEAD-2™ with MIPS32 4K or MIPS64 5K class of CPUs.