Editing SuperH (section)

===SH-4===
The SH-4 is a RISC CPU and was developed for primary use in multimedia applications, such as Sega's [[Dreamcast]] and [[List of Sega arcade system boards#Sega Naomi|NAOMI]] game systems. It includes a much more powerful floating-point unit{{ref|casio|[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]] and [[matrix–vector multiplication]]
* 128-bit floating-point bus allowing 3.2&nbsp;GB/sec transfer rate from the data cache
* 64-bit external data bus with 32-bit memory addressing, allowing a maximum of 4&nbsp;GB addressable memory (see [[Byte addressing]]) with a transfer rate of 800&nbsp;MB/sec
* Built-in interrupt, DMA, and power management controllers

{{note|casio}}There is no FPU in the custom SH-4 made for Casio, the SH7305.