Gameboy Advance Core

[Kayleigh Telega]

Myrecommendation is share pics of your Launchbox set-up. Right click and edit a game and show pics of the launcher tab and the emulation tab. then go to tool, manage emulators and edit your Retroarch emulator. Share pics of the Emulator Details tab and the Associated Platforms tab. It is easier to diagnose seeing some data on screen.

iv checked my set up 1000 times names where the same libretro cores where named corectly , anyway i launching them fine through launchbox now by using the standalone visual boy advance emulator as an .exe my only problem is the top emulator menu bar is shown everytime and i have to close it by pressing escape

I cannot help with that as I only use Retroarch for GBA games. I can set it up and test it so give me a few minutes. I still recommend sharing those pics of your RA set-up might as well find the issue and it can help if you set-up other RA cores and they do not work as well.

I just set it up VisualBoyAdvance emulator and in the options/video menu there is an option to start full screen. With it ticked I was able to start roms fullscreen with no windows bar. VBA I do not think has been updated in a long while (I think last update was 2014). RA cores are typically recommend for GB/GBA games.

i dont have that vba - m i have the vba emulator without ''m'' it doesnt have this full screen option but i figure out another way to hide the menu its just take 3 secont to hide it when i launch a game

Not sure. This is the only version of VBA I have. I do not use them since they are so outdated (2014). This was just a version I had sitting in my "unused" emulator folder for testing. If you want to try and get RA cores working this forum is great at working with its members to trouble shoot. Just set it up in Launchbox again and post some pics. Otherwise try finding a copy of VBA-M since it has that menu option.

Edited: If there is a config file in your VBA folder edit with notepad++ and see if there is a line for "fullscreen". If there is and it is set to 0 change it to 1 and save then restart VBA and see if that worked.

Games load perfectly fine using mGBA in RA using LB, you have to have something wrong in LB like a typo in your command line parameter or your platform name doesn't match up with the platform in the Associated Platforms.

Your eyes are not deceiving you. As of 5.0-14690, Dolphin now has mGBA directly built into it as a new way to handle Game Boy Advance connectivity with GameCube titles. For those who don't know, mGBA is the most renowned and accurate GBA emulator of this era and has been rapidly improving since its inception. Recently, we wrote about mGBA adding support for our TCP GBA protocol, but this is something completely new. With integration and synchronization work done by bonta, connecting your favorite GameCube titles with a Game Boy Advance for multiplayer and other bonus features is now greatly simplified. Dubbed the Integrated GBA, a stripped-down version of mGBA will boot up alongside Dolphin when set to one or more controller ports. These mGBA instances are clock-synced to GameCube emulation for impeccable connection stability. By bringing these two emulators together in one package, GBA connectivity features now work with popular features like savestates, input recordings, and netplay! All of this comes with the added bonus of improved performance and compatibility. If you don't believe us, check it out yourself!

Getting to this point has been a trial that spans generations of developers and emulators. If we're going to tell the full story behind emulating GBA to GCN communication, we have to start from the very beginning.

As a feature of the GameCube, Game Boy Advance connectivity was pushed to a significant degree in the early days of the system at events like E3, magazines, and of course television commercials. With talented developers from Sonic Team USA, Nintendo EAD, The Pokemon Company, and others releasing titles that would take advantage of the feature, it was easy to see the potential. And at its best, GBA connectivity games are incredibly fun and provide rather unique experiences that you wouldn't be able to find on any other console.

As those who had a GameCube would know, these experiences were few and far between. The feature was left in an awkward spot where it was expensive and needed lots of games to justify the cost, but because of the small userbase most developers weren't willing to invest a significant amount of effort into GBA connectivity features. There are some undeniable gems, but more often than not GBA connectivity features were tacked on poorly as some kind of checkbox feature. With the library now set, we can sort the types of GBA connectivity features into five rough categories.

The earliest recorded implementations of GBA connectivity emulation go back to around 2009, with the feature first being spotted in Dolphin r2578. While we don't know the exact details behind connecting the earliest versions to a GBA emulator, we do know from developer accounts that multiple ideas were trialed with a focus around the best GBA emulator of the era, VBA-M.

But before we could connect to another emulator, we needed to understand how the connection actually worked. GameCube games will actually encrypt the GBA binary that is sent to the various games, and the way it does this actually posed a bit of a problem for Dolphin early on. The encryption process took place on the Digital Signal Processor (DSP) under a special microcode that we refer to as the GBA microcode. Now this may sound weird, as most people consider the GameCube/Wii's Digital Signal Processor (DSP) specifically for audio emulation, but sometimes it could be used for other tasks. In this case, it is used to encode the executable sent to the GBA as a weak form of obfuscation.

The most notable part of this process is that the cipher used by the GBA BIOS for decryption includes a step where data is XORed with its author's nickname, kawasedo. This refers to Tomohiro Kawasae, who would also end up coding NES emulation features that would be used in GBA connectivity games like Animal Crossing, Metroid Prime and many others.

All of this happens once during the initial connection and only takes a fraction of a frame. After that the game quickly jumps back to the previous microcode before you can even hear an interruption in audio. As a special note, certain first party Nintendo games skipped this step and never swap microcodes. In these rare cases, the game (or service disc) will implement the encryption process directly in PowerPC code. This includes The Legend of Zelda: The Wind Waker, Animal Crossing, and potentially some service discs.

Other than that little bit of a curveball, the protocol in which the GCN communicated to the GBA was dead simple. The GBA Link Cable attached to the data port of the GBA and plugged into a controller port on the GameCube. On the GameCube side, communication was then handled by Serial Interface (SI). The main problem was then figuring out a good way to implement communication between two completely different emulators. While we know several methods were trialed, the surviving implementation from that era used the Transmission Control Protocol (TCP) to bridge communication between the GameCube and GBA emulators. While it may seem like an odd choice to use a network communication protocol, the decision was made in an effort to preserve the experience of having multiple separate devices connected to the GameCube. The idea was that you could still connect VBA-M on the same PC if you wanted, or you could connect it from another computer on the same network. These efforts were spearheaded by shuffle2 and while old support logs seem to indicate that this feature was just a framework and had very little functionality, users did claim that getting to Animal Crossing's GBA island was possible. Take that as you will.

While the initial GBA controller option turned up in 2009, the first evidence of true playability turned up in early 2010, with development posts from shuffle2 explaining how to use the new Joybus options in VBA-M and what to do in Dolphin. He, of course, included some screenshots that would wow prospective players.

GBA connectivity was finally working, but performance was abysmal. This was due to the obfuscation we mentioned earlier. Dolphin's DSP-HLE didn't support the GBA microcode, forcing users to fall back to DSP-LLE. And this isn't the DSP-LLE Recompiler we enjoy today. No, this was DSP-LLE Interpreter. shuffle2 lost interest in the project, saying that until the extreme performance problems were solved, there wasn't much point in doing anything. This would eventually be remedied with a DSP-HLE implementation of the GBA microcode developed by... shuffle2. With DSP-HLE support, performance in the few games that did work skyrocketed, but it didn't fix the core usability issues and low compatibility.

Frustration with how slowly the feature was progressing eventually strained relations between VBA-M and Dolphin developers in 2011. The drama resulted in shuffle2 losing interest in the VBA-M to Dolphin connectivity project, but it wouldn't be his last foray into the realm of GBA connectivity. He returned in 2014, this time using the Higan GBA core as the catalyst for his new experiment. When thinking about the best GBA emulators, using Higan's GBA core might seem odd on the surface, especially back in 2014. It was rather immature and couldn't match the high compatibility or performance of VBA-M. But that's not what he needed. Higan's GBA core offered something that VBA-M absolutely couldn't: A clean, modernized codebase that was easier to work with and integrate.

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