Hitachi SH-4

Historia

The SH-4 is a 32-bit RISC CPU and was developed for primary use in multimedia applications, such as Segas Dreamcast and NAOMI game systems. It includes a much more powerful floating point unit[note] and additional built-in functions, along with the standard 32-bit integer processing and 16-bit instruction size. SH-4 features include: FPU with four floating point multipliers, supporting 32-bit single precision and 64-bit double precision floats 4D floating point dot-product operation 128-bit floating point bus allowing 3.2 GB/sec transfer rate from the data cache 64-bit external data bus with 32-bit memory addressing, allowing a maximum of 4 GB addressable memory with a transfer rate of 800 MB/sec Built-in interrupt, DMA, and power management controllers