Complex sentence: A few years later it was shrunk to 0.42 µm and bumped to 66 MHz and 75 MHz. The 0.42 µm parts were rare, as Motorola decided to concentrate on their PowerPC RISC project.
Split into simpler sentences: A few years later it was shrunk to 0.42µm and bumped to 66MHz and 75MHz. The 0.42µm parts were rare, as Motorola decided to concentrate on their PowerPC RISC project.