Other GBA - Mystery encryption tool

[code1038]

Hello everyone !

i found a cartridge who contain a tool for to uncrypt dev cartridge (i believe).

maybe was used to send dev cartridge over mail without risk to get leaked...

i don't found any information on it. code was signed by Nintendo (01) but it can't be a nintendo tool
a sticker with japanese text is onside, but i don't know what has mean ("SOUND ROM" ?)
UPDATE: it could be a chip recycling

>>HERE a bunk of pictures

Video:


Same screen & same animation with & without cartridge.
I tried with a Mario Bros retail cartridge and it does nothing more. (retail cartridge still work fine)





same chip found on slot machine

 

[Denryu]

The chip label reads "モウジュウオウS, サウンドロム". It means "Sound ROM of Mōjūō S" which actually is a Japanese Slot Machine game. So that chip was harvested out of an old Slot Machine? Very strange.

委託【4号機パチスロ】猛獣王S（サミー）の画像

ameblo.jp

 

[Deleted member 2631]

-

 

[code1038]

add video
i teardown second cartridge

I made the most important part bold...

So, you're only guessing what it could be..? What makes you even believe this?

Maybe it is just what it says on the label?

text on screen

 

[Dr.Funk]

I think i figured it out. I searched the model of the flash chip msp55lv650 and got this
from this site https://flashcartdb.com/index.php/MSP55LV128_AGB-E05-01. It seems that they used salvaged slot machine flash chips on some cheap gba flashcards. So based on that I would guess that that device is a flash linker to program an empty flashcard through the gba linkcable port. However the only way to know for sure would be to dump the cart and inspect the rom.

 

[code1038]

i send cartridge to a friend
he will look at the code.

 

[PsyKo]

I don't have much time to look into it. Hope you guys will find something cool :
LINK