Homebrew [Help] Fixing injected GBA vertical alignment

[Cralex]

With all the recent innovations, I keep hoping someone will find a way to fix shenanigans like this:

To be fair, it often gets worse when you press the home button, so the picture is a bit extreme. It's only a sliver when you first launch the game, but it's really annoying. It only happens on this one N3DS that I have, not with my N3DSXL and not all the time. The unit in question was originally hacked otp-less A9LH and region-swapped from J to U, but I've tried it with everything after that. The problem still occurs under Luma 8.0. Any suggestions on how to prevent this would be appreciated. I have tried reinstalling stock AGB Firm without any noticeable improvement.

 

[Deleted User]

IIRC it has something to do with your SD card storage size and/or cluster size; is it formatted to a 32KB cluster size?

There was a thread about this sort of thing with a DBZ game. I don't remember if the OP fixed the problem with the above information or it was just that game (or any variation, like that dump of the game, etc.).

 

[Cralex]

I believe it's a 128GB card, but I can double-check later. I got it from a reputable source, so I'm sure the card is legit. I *think* it was formatted using either emunand9 or hourglass9, but maybe not? I assume these tools use the 32KB cluster size. Is there any way to check or should I just reformat it and try again? (Obviously, I'd use GM9 nowadays or a PC tool, whichever is recommended.)

Of the many GBA games I've injected, some don't seem to have this problem while others randomly display correctly or not.

 

[PrincessLillie]

I believe it's a 128GB card

That's way too fucking big. Go down a few sizes and the problem will correct itself. I recommend 32GB.

 

[zeldaism]

You're SD card isn't formatted to 32k. Copy everything from your SD card to your PC and format it with Guiformat then copy everything back.

 

[Quantumcat]

If you do some searching on this topic, you'll find the problem only occurs with 128GB cards and nobody ever found a solution (AFAIK).

 

[Cralex]

If you do some searching on this topic, you'll find the problem only occurs with 128GB cards and nobody ever found a solution (AFAIK).

Ah, ok. Interesting! I tried looking up the topic, but I couldn't think of what search terms to use. Never suspected the SD card, so that didn't help. I'll try reformatting it anyway, to see if it adds any... ( ͡° ͜ʖ ͡°) Stability.

Edit: And yes, my other unit's card is "only" 64GB, which goes along with what you're saying.

 

[contingences]

http://gbatemp.net/threads/q-gba-cia-on-emunand-not-rendering-screen-correctly.397084/

If your SD has 32KB Cluster size, the problem only occurs above 64GB ; so if you want to play gba on your 3DS, you'll need to stay at 64GB FAT32 32KB Cluster size