There was a planned upgrade system for the Nintendo 64 known as the 64DD. This expansion would be connected to this port on the bottom of the Nintendo 64 and allow for extra content on some games. On top of this some games were created for the DD however the entire project was considered a failure and it was never fully circulated to the public.
Look on the bottom of the system.
You start it by pressing the power button at the bottom
A rumble pack or a memory card.
Nintendo 64
The 64 was the graphics of the game console. In other words, the Nintendo 64 had 64 bits.
The Nintendo 64 like all Nintendo consoles were created in Japan.
The project 64 is a Nintendo 64 emulator that lets you play Nintendo 64 games that you download from websites.
The purpose of the Nintendo 64 was as a gaming console.
The Nintendo 64 runs on 64 bits hence the name.
Nintendo sold the most Nintendo 64 consoles in 1993.
Nintendo
The Nintendo 64 does not play Super Nintendo games as they have different cartridge types.