MIPS R4300

The MIPS R4300 is the primary CPU of the Nintendo 64, and is an NEC VR4300 with slight modifications. Running at 93.75 MHz, the R4300 handles game logic, reading responding to controller input from the PIF, and preparing display lists and audio command lists for the RCP to draw and synthesize audio.

http://n64dev.org/p/U10504EJ7V0UMJ1.pdf