ROM Hack Gamecart files (titleID.trim.3ds etc) explanation Godmode

Sony98 · Dec 1, 2020

Hi guys,

currently, i try to dump my 3ds game from a game card via godmode9, in B9S chainloader.
but i didnt find an explanation for the files, which are one the game card.
Do you know what these files mean?

-(titleID)_v00-priv.bin (80 Byte)
-(titleID)_v00.3ds (1.0 Gigabyte)
-(titleID)_v00.sav (512.0 Kilobyte)
-(titleID)_v00.trim.3ds (633,8 Megabyte)
-jedecid_and_sreg.bin (4 Byte)

I know what the .sav is, but iam a little bit confused, because its a card1 game and the .sav should be on microSD card.
The .3ds of course i know too but what is the .trim.3ds and how to use it???
What are all the files useful for?

Shadow#1 · Dec 1, 2020

Sony98 said:
Hi guys,

currently, i try to dump my 3ds game from a game card via godmode9, in B9S chainloader.
but i didnt find an explanation for the files, which are one the game card.
Do you know what these files mean?

-(titleID)_v00-priv.bin (80 Byte)
-(titleID)_v00.3ds (1.0 Gigabyte)
-(titleID)_v00.sav (512.0 Kilobyte)
-(titleID)_v00.trim.3ds (633,8 Megabyte)
-jedecid_and_sreg.bin (4 Byte)

I know what the .sav is, but iam a little bit confused, because its a card1 game and the .sav should be on microSD card.
The .3ds of course i know too but what is the .trim.3ds???

Trimmed Rom

Sony98 · Dec 2, 2020

Ok, i now know that the .trim.3ds is just a comprimised version of the game, looks like without header and some other unnecessary information.
Its just there to save storage.
The jedecid_and sreg.bin has something to do with the new save flash/EEPROM Types in some games. Maybe the jedecid_and sreg.bin is needed to read the saves from EEPROM.

But i still dont know why is a .sav in a card1 game, and what is going on with the (titleID)_v00-priv.bin file.

Shadow#1 · Dec 2, 2020

Sony98 said:
Ok, i now know that the .trim.3ds is just a comprimised version of the game, looks like without header and some other unnecessary information.
Its just there to save storage.
The jedecid_and sreg.bin has something to do with the new save flash/EEPROM Types in some games. Maybe the jedecid_and sreg.bin is needed to read the saves from EEPROM.

But i still dont know why is a .sav in a card1 game, and what is going on with the (titleID)_v00-priv.bin file.

Priv is the private header and no it's not a compromised version of the game