I stumble across someone who has very good knowledge of old modding technology and he has youtube showing all his old gaming information technology aswell he has video about this n64 console and cartridge called the IS VIEWER 64.
Basically what he said that this cart has ability to load development 64 stuff quicker. But it is interesting to see what the N64 community modding can do with this cart.
So heres the vid that he made.
P.S. I didn't release the guy is actually part of this forum, whose name is Gerry_MAN