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.

mig switch not working/updating??

stickybit · 2024-03-28T19:59:51+00:00

just got my mig switch and followed instructions to the T to update it and all im getting is a red light and then a message saying cart not recognised, all im trying to do is update it to the latest firmware, it says it should flash blue when...

0.226 Mame Core for Lakka ?

Thread starter bambi007
Start date Nov 10, 2021
Views 2,433
Replies 1

bambi007

Member

Newcomer

Level 3

Nov 10, 2021

I want to emulate game & watch roms on retroarch on the switch.
On Android (SwitchRoot 10) there is a .226 core to install. But the G&W games just get to 34 fps and seem slow.
So my hope is to use LAKKA Switch and use Retroarch there.
Does anyone know of a MAME core for LAKKA Swtich who supports .226 or higher to play the G&W games?

Last edited by bambi007, Nov 11, 2021

DarkenSX

Well-Known Member

Member

Level 4

Jan 16, 2022

bambi007 said:
I want to emulate game & watch roms on retroarch on the switch.
On Android (SwitchRoot 10) there is a .226 core to install. But the G&W games just get to 34 fps and seem slow.
So my hope is to use LAKKA Switch and use Retroarch there.
Does anyone know of a MAME core for LAKKA Swtich who supports .226 or higher to play the G&W games?

lakka includes all cores and current versions at the time the version was built you can try overclocking the cpu (if you haven't already) and it might help... you can also try nightly lakka builds (but expect bug and broken stuff) to see if theres been a change.