ok all this may sound retarded but i grew up playing the n64 and i missed not having one so i bought one off ebay. anyway ive got no memory cards with it yet when i play games like pilotwings, goldeneye they are save files on there. i always thought i needed amemory card to save on the n64. i cant believe this im so shocked, is there actually built in memory in this thing? if not how are the saves there?