Hacking Creating "Patches" for Cia-installed games?

[ChrisX930]

Hey Guys,

right now, I'm rewriting "Harvest Moon 3D - A New Beginning" and I want to test the changes without rebuild the whole rom as cia and reinstall it on CFW.

Is there a way to create "Patches" which only contains the changed files inside of the romfs.bin?
I want to install it as a "patch" to overwrite the old files with the new files. It'S better to install small patches with a size of ~1MB instead of rebuild the whole cia (350MB).

Is there a way?
If yes, is there a tutorial?

 

[gudenau]

Appears to be the case.

 

[ChrisX930]

Appears to be the case.

Does it mean I only need to delete all other things that are not changed from romfs and change gameinfo to "Patch" in rsf?
Will this really work?
If not, is there a tutorial how to do it?

 

[gudenau]

Does it mean I only need to delete all other things that are not changed from romfs and change gameinfo to "Patch" in rsf?
Will this really work?
If not, is there a tutorial how to do it?

There is not much info out there about this, try taking a cia from funkycia2 that has the romfs and decrypt it, that should help. Maybe you could create a tutorial, that could be great from translation, custom content, or just texture hacks. Best of luck!

 

[gamesquest1]

use NTR with layeredFS......makes testing stuff out in game much easier

 

[The Real Jdbye]

Hey Guys,

right now, I'm rewriting "Harvest Moon 3D - A New Beginning" and I want to test the changes without rebuild the whole rom as cia and reinstall it on CFW.

Is there a way to create "Patches" which only contains the changed files inside of the romfs.bin?
I want to install it as a "patch" to overwrite the old files with the new files. It'S better to install small patches with a size of ~1MB instead of rebuild the whole cia (350MB).

Is there a way?
If yes, is there a tutorial?

NTR-CFW can redirect RomFS access to SD card using the LayeredFS plugin, so that you could simply place the modified files on the SD card and it would load them. The old NTR-CFW versions are based on the Gateway launcher and will work with the GW cart but only support emuNAND up to 6.3 I think it was.

 

[gudenau]

Forgot about the layeredfs thing. :-P

 

[ChrisX930]

NTR-CFW can redirect RomFS access to SD card using the LayeredFS plugin, so that you could simply place the modified files on the SD card and it would load them. The old NTR-CFW versions are based on the Gateway launcher and will work with the GW cart but only support emuNAND up to 6.3 I think it was.

Good to know
But their are some problems then:
1. I don't own any Flashcard, so I'm not able to install anything to EmuNAND.
2. I own this Game on eSHop, but cannot download it on a EmuNAND below 9.7 (because I can't use the eshop).

I think it would be a nice idea by creating a .cia-patch.
But Right now, I don't know what I've to change to get it to work.
I guess I need do modify some entrys in rsf?

Spoiler: ORIGINAL RSF

BasicInfo:
Title : "BOKUJYOM"
CompanyCode : "CU"
ProductCode : "CTR-P-ABQP"
ContentType : Application
Logo : Nintendo

TitleInfo:
UniqueId : 0x0eae
Category : Application

CardInfo:
MediaSize : 512MB
MediaType : Card1
CardDevice : NorFlash

Option:
UseOnSD : true
EnableCompress : true
FreeProductCode : true
EnableCrypt : false
MediaFootPadding : false

AccessControlInfo:
# UseExtSaveData : true
ExtSaveDataId : 0x0eae
SystemSaveDataId1 : 0x00000eae
SystemSaveDataId2 : 0x00000000
OtherUserSaveDataId1 : 0x00000
OtherUserSaveDataId2 : 0x00000
OtherUserSaveDataId3 : 0x00000
UseOtherVariationSaveData : false

SystemControlInfo:
SaveDataSize : 512K
RemasterVersion : 0
StackSize : 0x00004000
JumpId : 0x00040000000eae00L

Can someone tell me how I can make it to a patch-cia?
I've build a romfs.bin just with the modified files in it (with the correct path etc.)

 

[gamesquest1]

Good to know
But their are some problems then:
1. I don't own any Flashcard, so I'm not able to install anything to EmuNAND.
2. I own this Game on eSHop, but cannot download it on a EmuNAND below 9.7 (because I can't use the eshop).

I think it would be a nice idea by creating a .cia-patch.
But Right now, I don't know what I've to change to get it to work.
I guess I need do modify some entrys in rsf?

Can someone tell me how I can make it to a patch-cia?
I've build a romfs.bin just with the modified files in it (with the correct path etc.)

if sysnand is on 9.0-9.2 use the eshop patch to access eshop, then download the game from eshop, downgrade to 4.x and use NTR 1.0

bit long winded, but i dont think there is too much info on building patches.....although it *should* be possible, there isn't much/any examples for you to go on except looking on 3Dbrew and looking at normal retail patches, i tried making the custom theme files a while back and they didnt work even though they *should* of, so im not 100% on whether GW supports modded cxi files or if its just system titles it doesnt play nice with

 

[ChrisX930]

if sysnand is on 9.0-9.2 use the eshop patch to access eshop, then download the game from eshop, downgrade to 4.x and use NTR 1.0

that's a bit much work... SysNAND is 4.5...
I guess it would be better to understand how we can create our own patches.

bit long winded, but i dont think there is too much info on building patches.....although it *should* be possible, there isn't much/any examples for you to go on except looking on 3Dbrew and looking at normal retail patches, i tried making the custom theme files a while back and they didnt work even though they *should* of, so im not 100% on whether GW supports modded cxi files or if its just system titles it doesnt play nice with

That's weird :/
Own patches would be awesome!
tried to modify the rsf in some ways (changed "Application" to "Patch") but it doesn't work :/

 

[Oishikatta]

that's a bit much work... SysNAND is 4.5...
I guess it would be better to understand how we can create our own patches.


That's weird :/
Own patches would be awesome!
tried to modify the rsf in some ways (changed "Application" to "Patch") but it doesn't work :/

The others have all been done by modifying an existing patch, rather than creating a new one.

E.g. https://gbatemp.net/threads/rom-hacking-item-duplicate-for-mh4g.379033/

 

[ChrisX930]

The others have all been done by modifying an existing patch, rather than creating a new one.

E.g. https://gbatemp.net/threads/rom-hacking-item-duplicate-for-mh4g.379033/

Can I use this Patch as base for another game?
As I know, Harvest Moon 3D - A New Beginning" has never got any patches or DLCs

 

[DarkFlare69]

use NTR with layeredFS......makes testing stuff out in game much easier

NTR-CFW is only for the new 3DS.. at least that's what it says.

 

[Oishikatta]

Can I use this Patch as base for another game?
As I know, Harvest Moon 3D - A New Beginning" has never got any patches or DLCs

No, I don't know of anyone that's done it on a game that never got any patches. (Doesn't mean it hasn't happened, I just haven't seen it.)

 

[ChrisX930]

NTR-CFW is only for the new 3DS.. at least that's what it says.

There's a version of NTR-CFW for the old3DS (NTRCFW 1.0) but It's to much work to install it to my 3DS because I've to get a copy of the game from the eshop, downgrade the NAND and such...

So I just want to find a "new" way to install new Patches to the game.
Si I want to create a "Patch" for HM3D

 

[DarkFlare69]

There's a version of NTR-CFW for the old3DS (NTRCFW 1.0) but It's to much work to install it to my 3DS because I've to get a copy of the game from the eshop, downgrade the NAND and such...

So I just want to find a "new" way to install new Patches to the game.
Si I want to create a "Patch" for HM3D

Where can I get NTR-CFW v1.0? Does it have to be from the eShop? (I have it on cartridge and on Gateway)

 

[gamesquest1]

NTR-CFW is only for the new 3DS.. at least that's what it says.

NTR-CFW 1.0 = 4.x o3DS, NTR-CFW 2.0 = n3DS only

There's a version of NTR-CFW for the old3DS (NTRCFW 1.0) but It's to much work to install it to my 3DS because I've to get a copy of the game from the eshop, downgrade the NAND and such...

So I just want to find a "new" way to install new Patches to the game.
Si I want to create a "Patch" for HM3D

best bet is simply looking at how other game patches are put together see if you can simply copy the process

 

[ChrisX930]

Where can I get NTR-CFW v1.0? Does it have to be from the eShop? (I have it on cartridge and on Gateway)

You can find NTR-CFW on GBATemp, I guess.
No, you don't need the eshop version, but I have to use this version because:
- I've bought the eShop version 2 Years ago
- I don't own any flashcard
- I don't have this Game as Retail Cartridge

 

[ChrisX930]

//doublepost, sorry

 

[ChrisX930]

NTR-CFW 1.0 = 4.x o3DS, NTR-CFW 2.0 = n3DS only


best bet is simply looking at how other game patches are put together see if you can simply copy the process

Nice idea, but where can I find this DLCs as decrypted version? :/
Will go to sleep now, If someone knows how to do that, tell me via PM or in this thread Please

 

[Zidapi]

The solution is easy, if you view it as difficult then you should probably give up on the rewrite now.

Get a second SD, run the eShop patch and re-download the game to the new SD card.

Backup the contents of the SD card and prepare an emuNAND via the gateway menu.

Restore your backup and copy Gateway's 2.6 launcher.dat, arm11.bin and the plugin directory to your SD card.

Load the Gateway menu via the DS profile exploit and boot into Classic Mode.

Done.

Edit: Google translated setup instructions should you need it are here