Homebrew blargSnes -- SNES emulator for the 3DS (WIP)

[LWares87]

Just for Halloween, i wanted to play Super Ghouls n' Ghosts.

Although... it has graphical problems in-game though, where you can only see the HUD part of the screen. What confuses me, is that the pre-rendered custscenes and the menus come up alright though. :S

Edit: I know this actually isn't in the pipeline as yet, but... have you thought of what you're going to have playing as the channel sfx yet?

 

[Arisotura]

> have you thought of what you're going to have playing as the channel sfx yet?

Probably the default sound because I'm a lazy ass.

 

[RowanDDR]

StapleButter, just an idea: dim the bottom screen (darker font?) when emulation is in progress. Otherwise its a little distracting when playing at night. You have more critical things to work on I'm sure but there you go just an idea.

 

[loco365]

> have you thought of what you're going to have playing as the channel sfx yet?

Probably the default sound because I'm a lazy ass.

If you want people to submit various sounds, I can convert the best one for you if you don't have the necessary applications.

 

[piratesephiroth]

You don't even need to ask people to submit anything... I have a winner right here

http://is.gd/upagoh

You're welcome

 

[gamesquest1]

seeing as there was no specific "snes" intro sound, the only one i remember as common a snes "into" would be the konami intro.....fits nicely into the 3 second limit for bcwav files too
http://vocaroo.com/i/s0yLjdkMGBAn

 

[piratesephiroth]

I'm absolutely sure this is the most well known SNES sound effect
http://themushroomkingdom.net/sounds/wav/smw/smw_coin.wav

But regarding this emulator, to be fair... TO BE FAIR...
http://themushroomkingdom.net/sounds/wav/smw/smw_blargg.wav

 

[gamesquest1]

I'm absolutely sure this is the most well known SNES sound effect
http://themushroomkingdom.net/sounds/wav/smw/smw_coin.wav

But regarding this emulator, to be fair... TO BE FAIR...
http://themushroomkingdom.net/sounds/wav/smw/smw_blargg.wav

yeah probably the coin noise is the best and most known sound effect

 

[einstein95]

Why not http://vocaroo.com/i/s1byeKTIrJ7j or http://vocaroo.com/i/s1Hu4VQGXL43

 

[kyogre123]

I vouch for the coin sound.

 

[hippy dave]

http://gbatemp.net/threads/release-3ds-cfw-cia-installer.373461/page-8#post-5142739

 

[the_randomizer]

http://gbatemp.net/threads/release-3ds-cfw-cia-installer.373461/page-8#post-5142739

Not without the DSP library it won't.

 

[gamesquest1]

Not without the DSP library it won't.

the DSP binary should be un-needed as he *should* have access to CSND with this

 

[the_randomizer]

the DSP binary should be un-needed as he *should* have access to CSND with this

Ah, good point, this should make things less stressful then.

 

[Arisotura]

I'd rather the drama around that leak doesn't invade this thread


Speaking of sound, there are just too many issues with trying to run the SPC700+DSP on the syscore.

It worked well on the DS because they stayed somewhat in sync, even though there was no explicit sync between the two. Basically each CPU spent most of its time emulating its core and all was good.

It's not the case on the 3DS. The syscore spends most of its time running the 3DS kernel, and the appcore spends most of its time emulating the PPU.

While on the SPC side, a timer can be used to ensure consistent timings, timings on the CPU side aren't going to be anywhere near consistent.


SPC700 will be emulated on the appcore, the 'proper' way (not exactly proper because timing will be gross but a lot better). At the cost of some performance, but I'm positive the impact will be minor.

Maybe the DSP can be emulated on the syscore with carefully designed syncing.


Blah, sidetracked again. I also want to work on graphics rendering.

 

[the_randomizer]

I'd rather the drama around that leak doesn't invade this thread


Speaking of sound, there are just too many issues with trying to run the SPC700+DSP on the syscore.

It worked well on the DS because they stayed somewhat in sync, even though there was no explicit sync between the two. Basically each CPU spent most of its time emulating its core and all was good.

It's not the case on the 3DS. The syscore spends most of its time running the 3DS kernel, and the appcore spends most of its time emulating the PPU.

While on the SPC side, a timer can be used to ensure consistent timings, timings on the CPU side aren't going to be anywhere near consistent.


SPC700 will be emulated on the appcore, the 'proper' way (not exactly proper because timing will be gross but a lot better). At the cost of some performance, but I'm positive the impact will be minor.

Maybe the DSP can be emulated on the syscore with carefully designed syncing.


Blah, sidetracked again. I also want to work on graphics rendering.

My apologies, just an idea on how it could be done is all But it seems that there are other ways to do it, which is good. My question is will the 3DS be powerful enough to support FIR filtering, Gaussian and ADSR?

 

[Pox]

I tried to run Chrono Trigger: Crimson Echoes on my red GW, but no luck wouldnt even start it and I had to press power off button to exit.

 

[Arisotura]

Interesting thing to know. I'll look into it.


Regarding the SPC700, I changed it to run somewhat synchronously to the main CPU. There is some slowdown, but not too much (I'm positive the hardware-assisted renderer I'm planning will help with that anyway).

SPC700 is ran every scanline, which is a good compromise. Running it less often doesn't give a visible speedup, indicating that the cost of switching between the CPU and the SPC is minimal. And this way, most of the abnormally long loading times or pauses caused by SPC700 code/data uploads last less long, closer to the original thing.

Now looking for a good way to offload DSP mixing to the syscore.

 

[Arisotura]

Hah, it's done.


Sound is still a bit noisy though. I guess it's because of the transitions between buffers. Don't quite know how to handle them cleanly with CSND or if it's possible at all.

lolSNES didn't have that issue because mixing and playback had the exact same timing (both based on the system clock). It's impossible to achieve such a level of precision on the 3DS, sadly.


Increasing the buffer size reduces noise but also increases latency.


Oh well, this will do for now. Time to work on more fun things. (read: hardware-accelerated PPU)

 

[hippy dave]

Awesome. In an entirely not-asking-for-ETA kind of way, do you have an idea of at what point in this exciting progress you might squeeze out another release?