GameBoy Advance Emulator port - gdkGBA (works on 5.0)

jakibaki · May 17, 2018

ragingninja3 said:
Does this work on 4.1?

I think so. I don't own an 4.1 switch so I can't try but I don't see any reason why it wouldn't.

RedoLane · May 17, 2018

Next stop: Custom Shaders support!

xXDungeon_CrawlerXx · May 17, 2018

Next stop: Fix the Sound issue

Playing games with buggy/laggy sound doesn't make fun

Deletedmember448668 · May 17, 2018

xXDungeon_CrawlerXx said:
Next stop: Fix the Sound issue

Playing games with buggy/laggy sound doesn't make fun

I agree the sound is horrible but beggars can't be choosers.

SimonMKWii · May 17, 2018

One recommendation; or at least an option for it would be nice:
Non-filtered scaling.
I personally like my pixels sharp, rather than smooth.

Bedel · May 17, 2018

jakibaki said:
I think so. I don't own an 4.1 switch so I can't try but I don't see any reason why it wouldn't.

It does. Also, playing KH:COM, I had an error message while the opening cutscene. It just crashed so hard lmao. Gj, I like it so much.

Leonidas87 · May 17, 2018

SONIC IS PISSED everyone will be playing Pokemon instead now haha

Lmfao this emulator is welcome in my books.

Nerdtendo · May 17, 2018

You're a blessing

Bedel · May 17, 2018

Crash again with Pokémon emerald. No problem, keep it up.

Leonidas87 · May 17, 2018

This is a great day in the community.
FINALLY THE VIRTUAL CONSOLE WE ALL DESERVE!
We now have Arcade games, Game Boy Advance games, Game Boy Color games, Sega Gamegear/Genesis/CD games all running.
All running on 4.1.0, 5.0.2 or 4.X.X and 5.X.X software version of the Nintendo Switch.
Might not be 100% but we are off to an AMAZING START.
You never know what will be next.
GBA, GBC AND SEGA CD all in the video link below:

--------------------- MERGED ---------------------------

Bedel said:
Crash again with Pokémon emerald. No problem, keep it up.

Maybe it's the roms you have.

Heard someone say Leaf does not run but does for me in the video you can see

jakibaki · May 17, 2018

SimonMKWii said:
One recommendation; or at least an option for it would be nice:
Non-filtered scaling.
I personally like my pixels sharp, rather than smooth.

As easy as this may sound (and as much as I'd want it too) this is not possible without a massive amount of lag right now

Everything is software-rendered right now and the only thing in this app that's hardware accelerated is the scaling (by setting the switches display-resolution which also results in the blur).
What you want would need about 8 times the amount of pixels rendered in one frame since the scaling would have to be done in software.

SimonMKWii · May 17, 2018

jakibaki said:
As easy as this may sound (and as much as I'd want it too) this is not possible without a massive amount of lag right now
Everything is software-rendered right now and the only thing in this app that's hardware accelerated is the scaling (by setting the switches display-resolution which also results in the blur).
What you want would need about 8 times the amount of pixels rendered in one frame since the scaling would have to be done in software.

Ah, I gotcha!
Just out of interest, would it be possible to make a super-slow test build?
I just want to see what it would look like when scaled like that to the Switch screen, massive thanks if you can do that!

Sonicbrawler · May 17, 2018

Tried a Pokemon Fire Red rom hack but it crashed on me a few mins in. Might just be the rom itself. Either way, great work!! This is perfect to hold us over till RetroArch works!

EDIT: Oh hm. Sonic Advance 2 crashed also. interesting

renhei · May 17, 2018

So, I made a little improvement to the sound. Just a quick hack, doesn't fix everything. The music sounds fine, but gets crappy for a couple seconds when moving between areas, but then goes back to normal.

@jakibaki All I did was change SND_FREQUENCY in sound.h from 32768 to 48000, based on the sampling rate SDLPoP uses.

Here's a video:

Not perfect but hey, a lot better than before.

As to why it slows down between scenes, that might just be because of lag from rendering everything in software, but I dunno for sure.

gnmmarechal · May 17, 2018

Nicely done. I'll add this to SwitchDB as soon as I can.

jakibaki · May 17, 2018

renhei said:
So, I made a little improvement to the sound. Just a quick hack, doesn't fix everything. The music sounds fine, but gets crappy for a couple seconds when moving between areas, but then goes back to normal.

@jakibaki All I did was change SND_FREQUENCY in sound.h from 32768 to 48000, based on the sampling rate SDLPoP uses.

Here's a video:

Not perfect but hey, a lot better than before. I attached the executable with this change.

As to why it slows down between scenes, that might just be because of lag from rendering everything in software, but I dunno for sure.

Thank you very much! I'll push your change to the repo and release the new version in a few minutes!

EDIT: I pushed the update

radaq · May 17, 2018

I got a crash playing sonic advance 3 also I noticed slow down in the game.

tomhanks69 · May 17, 2018

so no 5.0.2 support?

Sonicbrawler · May 17, 2018

tomhanks69 said:
so no 5.0.2 support?

it works fine in 5.0.2

Real.96 · May 17, 2018

jakibaki said:
I ported the gameboy advance emulator gdkGBA (originally made by gdkchan) to the nintendo switch! (All versions as far as I know)

Unfortunately this emulator doesn't support in-game-saving (it crashes when you attempt to save!) so I added an savestate feature:
Press Plus+R so save the current state and Plus+L to load it again.

Simply put the rom into sd:/switch/roms/ and start the homebrew.

As soon as retroarch gets updated for 5.0 this will instantly become obsolete!

source (you need the sdl2-libraries from the devkit-pro pacman to build this)

Known issues:
Sound is a bit weird (it seems like sometimes the wrong instruments play)
After loading a savestate the sound gets even more weird for a while (or until the music changes)
Some games seem to crash the switch after a while.

UPDATE:
Sound now much better now! Many thanks to @renhei for the fix!

Really, thanks you so much for this and for GBC emu <3

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