1 . I haven ' t seen anything . Keep in mind , every system 3 DS , 2 DS , N 3 DS all use the same charger . 2 . Nope . You can get a Nintendo Network ID , but you can only have that tied to one 3 DS system . But a NNID will allow you to redownload games if something happens to the system . 3 . Yes it is ! 4 . Yes . You can access the micro SD card from the back of the console , under the back plate . The one it comes with is around 4 GB . <| sep |> Hillary lost . Get over it . <| sep |> The SM yeah , but the vitpilen looks remarkably similar to the concepts . <| sep |> Its not DMA . You are correct in that all syscalls aren ' t async . Nginx is async and it uses sendfile to get the kernel to write data frome one file descriptor to another . The file descripors involved in this case is a file on disk and a network socket . Sendfile frees Nginx from having to read the file from disk and then write it to the network socket . So Nginx can do other things while the kermel sends the data . When the kernel is done Nginx will get notified and do further procesding if needed . Another good thing about sendfile is that data doesnt have to go from kernelspace to userspace and then back again . It all happens in kernelspace , saving some context switching and unnecessary data copying .