Hacking Save backup/write?

[AuthorX]

I haven't seen anything like this so I'm wondering, is there any way to use the R4 to backup save files? I tried the ROM dumping function with GBAldr, but I don't know if the SAV file is actually a save file, since someone said it's meant to dump the RAM of the 3-in-1 or something like that. I also want to know if it's possible to overwrite the save file in an official GBA game with a backed up save using the R4.

I'm also curious about DS game saves, but I don't know if it would be possible. I've found developers to be very crafty, though, so it might be possible. I'd also like to know if this would be possible if I had the 3-in-1 or other (cheap) slot-2 device.

 

[myuusmeow]

Google SavSender and SavReceiver. You'll need working WiFi and connected computers (WiFi or not) for it to work though.

 

[enigmaindex]

Google SavSender and SavReceiver. You'll need working WiFi and connected computers (WiFi or not) for it to work though.

What he said, it is difficult to do for the first time and you need some experience with routers if you have one and know how to forward ports and stuff

This topic found here will break it down into manageable steps, be sure to follow them carefully though.

 

[AuthorX]

Thanks, I'm trying to do all that, but right now I'm stuck on getting homebrew working with WiFi (my DS can't see the router in my dorm room at all, even when I manually enter the SSID, and it can't seem to get to the internet when I set up my Nintendo WiFi Connector as SoftAP).

I'll work on it more tomorrow.

Is there any way to do this with just GBA carts without using WiFi?

~e~
Never mind, I kept working on it and got the connection working. Now I just need to try that program.

~e2~

Connecting to server...
Error!
Sending EEPROM contents.........
.....

*sigh*
I guess I will work on it later.

~e3~
Hah! I got it. It was just the Windows Firewall. Now I just need to figure out GBA saves, and how to restore as well as backup. Thanks, guys!

 

[DanTheManMS]

Restoring can be done via SavSender as well, though I don't know if SavReceiver has the capability to do it. If you go to the SCDev forums in the FAQ section, you'll find my how-to on using the "netcat" program with SavSender to both dump and restore save files. It's the one that the previous guide was based off of, but I haven't updated it in ages.

For GBA saves, the only way you can do it from an R4 is to use EEPINATOR, which will only work on SRAM saves. GBA saves in EEPROM or Flash format will not work. If you have a slot-2 device with DLDI support, you can use Chishm's cart_save utility which will backup and restore all types.