[**Homebrew**](https://en.wikipedia.org/wiki/List_of_homebrew_video_games) usually refers to software that is not authorized by Nintendo. This includes homebrew tools, applications, games, and emulators.
In many cases, running homebrew on your device is 100% free using just the Nintendo 3DS Sound app. There are also various other exploits in commercial games and the browser to get homebrew running.
**Custom Firmware** ("CFW") gjør det mulig for deg å bruke mer avanserte hacker som brukerland homebrew ikke lett kan gjøre. For eksempel gjør signaturpatcher det mulig å installere usignerte titler som vises på hjemmemenyen din.
Denne veiledningen har som mål å ta en kompett uforandret 3DS fra fabrikkfirmware
firmware to boot9strap powered Custom Firmware. På noen versjoner bruker den homebrew som ett startpunkt, men Custom Firmware er fortsatt målet.
boot9strap is the newest and best method of launching Custom Firmware that gives us nearly full control of the system only milliseconds into boot, which is similar to the effect of BootMii for the Wii. It gives us even earlier control than arm9loaderhax did, and, unlike standard sighax, boot9strap uses an NDMA overwrite exploit in order to gain Boot9 code execution. This means that any console running boot9strap is capable of dumping the console unique OTP (`OTP.bin`), the ARM11 bootrom (`boot11.bin`), and the ARM9 bootrom (`boot9.bin`).
The benefits of boot9strap over other Custom Firmware launch methods are numerous, and as such it is recommended to use this guide over any other that relies on outdated software (such as menuhax + rxTools, arm9loaderhax, or even normal sighax).
+ Kjør mange gamle Nintendo DS flashkort som ble blokkert for lenge siden eller aldri virket på Nintendo 3DS
+ Trygg oppdatering til den nyeste systemversjon uten frykt for å miste tilgang til homebrew
## Hva må jeg vite før jeg starter?
+ **Før du starter veiledningen, må du vite risikoen for 3DS hacking: HVER gang du endrer systemet, er det alltid et potensial for en UOPPRETTELIG brick. De er sjeldne, men fortsatt en mulighet så pass på at du følger ALLE trinnene NØYAKTIG.**
+ If you have already hacked your 3DS before to get an EmuNAND setup, and would like to move the contents of your previous EmuNAND to your new SysNAND CFW, you should follow all instructions and restore your existing EmuNAND when prompted once you reach [Finalizing Setup](finalizing-setup).
+ Your SD card should be [MBR, not GPT](http://www.howtogeek.com/245610/) (the SD card that comes with your device will be MBR by default). The easiest way to test this is to check if the SD card works in your 3DS. If it works, the SD card is MBR.
+ If you need to format a brand new SD card, you can use [guiformat](http://ridgecrop.co.uk/index.htm?guiformat.htm) and set to an Allocation Unit Size of 32K (32768). If your SD card is 64GB or larger, use an Allocation Unit Size of 64K (65536) instead.
+ The Old 2DS is essentially identical to the Old 3DS in terms of software, while the New 2DS is essentially identical to the New 3DS in terms of software. Any steps which say "Old 3DS" also apply to Old 2DS, and any steps which say "New 3DS" also apply to New 2DS.