Hello guys, this is my first post here! I just got a MIG Switch card out of curiosity and I was tinkering with it. For those who don't know, it's used by placing XCI dumps as well as other game specific bin files in the sd card of the MIG Switch, and are obtained from the original cartridge by using an app like nxdumptool. Two of these bin files are mandatory to get the game to boot: Initial Data.bin and Certificate.bin. They stay the same for every cartridge of a specific game. Now, if you want to use an XCI dump from a shady website it's impossible to get it to work without those files. By using the Certificate.bin from another game it has no problem, but this does not count for the Initial Data.bin. So I looked for a way to obtain this Initial Data from an XCI file and read a bit of the XCI file documentation from switchbrew dot org. Here's what I understood so far: The Switch checks if the cartridge is valid by doing a challenge–response authentication on the Initial Data. The Package ID is contained both on the XCI and the Initial Data, on positions 0x110 and 0x0 respectively. The Initial Data hash is on the XCI at position 0x160. It is calculated by doing a SHA-256 hash on the full Initial Data content. So I was wondering, is there a way to to construct a functional Initial Data file starting from an XCI dump? I also tried a reverse approach by editing the Package ID in the Initial Data from another game, generating the Initial Data hash and putting it in the XCI file but is not enough to get the Switch believe it's a real game. Sorry if this may seem stupid but let me know what you think.

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Hacking Question Atmosphere 0.10.5 increased boot time?

Thread starter pLaYeR^^
Start date Apr 8, 2020
Views 1,395
Replies 2

pLaYeR^^

Doctor Switch

Member

Level 13

Apr 8, 2020

I have updated my switch to 9.2.0 and I noticed that when I boot Atmosphere with hekate that the boot time has increased significantly. I have set autboot with boot delay of 3 seconds but the hekate splash screen stays for about 12 seconds. Has someone experienced a similiar behaviour?

Last edited by pLaYeR^^, Apr 8, 2020

ScarletDreamz

[Debug Mode]

Member

Level 14

Apr 8, 2020

pLaYeR^^ said:
I have updated my switch to 9.2.0 and I noticed that when I boot Atmosphere with hekate that the boot time has increased significantly. I have set autboot with boot delay of 3 seconds but the hekate splash screen stays for about 12 seconds. Has someone experienced a similiar behaviour?

On what firmware where you before updating to 9.2.0? also, 12 secods its a lot, mine takes about 2 / 3 seconds with EmuMMC set up.

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pLaYeR^^

Doctor Switch

Member

Level 13

Apr 8, 2020

ScarletDreamz said:
On what firmware where you before updating to 9.2.0? also, 12 secods its a lot, mine takes about 2 / 3 seconds with EmuMMC set up.

Previously, my switch was on 9.1.0. I hadn't had that long boot times before. I also boot EmuMMC.