with help from wikipedia.
During the development of Goldeneye 007, a weapon (RCP-90) was included as an in-joke amongst the developers.
RCP (Reality Co-Processor) is one of two main chips for the Nintendo 64 (the other being the NEC VR4300). It was developed by Silicon Graphics for Nintendo, and little is known about it or the way it works.
The RCP features a vector processor. It handles the audio and video of the Nintendo 64 and can perform very well in operations such as: real-time edge anti-aliasing, high frame-rate on complex images, automatic load-management, advanced texture mapping, real-time depth buffering, etc.