Hacking retro desmume not showing roms from ux0/data/desmume

[rickpower]

yea so i installed vita homebrew browser and i saw psvita RetroArch desmume installed it now i cant find roms in ux0/data/desmume folder to play it nothing shows up.. while ago i had install retroarch nightly build when running this i can see the files, can load it to play THOU it hardly moves,slowest thing every...my UMI Rome X can play 999 game just fine... retroarch desmume that is only for 3ds game might play it little faster maybe, however desmume wont even show the game files,can someone please help

 

[Tom Bombadildo]

Desmume will probably never run games full speed really, you shouldn't bother trying it at all.

Though I'm a bit confused what you mean when you say "retroarch desmume that is only for 3ds game", since Desmume is just a DS emulator, it doesn't run 3DS games at all, just DS games in .nds format

 

[rickpower]

ooh my bad i meant to say ds game lol shame on desmume then ill just use my 3ds to play ds games then

 

[Lord M]

Even with use of GPU can't run DS games? But why? Ok the PSV is not so powerful, but even the DS...

 

[Tom Bombadildo]

The main reason is simply because current DS emulators are unoptimized ass. Desmume wasn't designed to run on ARM, and while it was ported to the Vita it's still very unoptimized for the hardware.

If ExoPhase would port DraStic (or made it open source) we'd probably have at least a semi decent DS emulator (since the Vita isn't exactly all that powerful, it probably won't run too many games full speed). But that's never going to happen, so we're stuck with Desmume.

 

[Kotomine Kirei]

The main reason is simply because current DS emulators are unoptimized ass. Desmume wasn't designed to run on ARM, and while it was ported to the Vita it's still very unoptimized for the hardware.

If ExoPhase would port DraStic (or made it open source) we'd probably have at least a semi decent DS emulator (since the Vita isn't exactly all that powerful, it probably won't run too many games full speed). But that's never going to happen, so we're stuck with Desmume.

What about that thing about systems needing to be 8x (or was it 10x?) more powerful than the systems that they are trying to emulate?
If that is true, then the PS Vita should be far more than powerful enough to run games on an optimized DS emulator at full speed, right?

 

[Tom Bombadildo]

That's a general guideline, not really a strict rule.

The main problem, though, is the CPU for the Vita. It's max speed is 444mhz, which isn't necessarily a lot in the grand scheme of things. ExoPhase used to (I dunno if he still does ) use a Pandora for DraStic testing, which had a 1GHz A8 CPU and it just "barely" runs games at playable speeds.

 

[Kotomine Kirei]

That's a general guideline, not really a strict rule.

The main problem, though, is the CPU for the Vita. It's max speed is 444mhz, which isn't necessarily a lot in the grand scheme of things. ExoPhase used to (I dunno if he still does ) use a Pandora for DraStic testing, which had a 1GHz A8 CPU and it just "barely" runs games at playable speeds.

I thought that it was faster than that because of the Wikipedia page for its processor that says that the max clock rate is 0.8 to 2 GHz.
Is there a reason for it being so much slower?
Downgraded version, heating issues, system using a lot of it, etc.?

 

[Tom Bombadildo]

I thought that it was faster than that because of the Wikipedia page for its processor that says that the max clock rate is 0.8 to 2 GHz.
Is there a reason for it being so much slower?
Downgraded version, heating issues, system using a lot of it, etc.?

Those numbers are the factory speeds that ARM reports, not what the Vita actually uses. The Vita only has access to 444mhz fully clocked, nothing higher can be achieved without possibly damaging the system or blowing through the battery in 2 minutes.

The Vita is severely underclocked to avoid overheating and to increase battery life. Hell, some games that run at the 444mhz clock can cause the Vita to get relatively hot to the touch, so clocking it higher would be asking for trouble.

 

[Kotomine Kirei]

Those numbers are the factory speeds that ARM reports, not what the Vita actually uses. The Vita only has access to 444mhz fully clocked, nothing higher can be achieved without possibly damaging the system or blowing through the battery in 2 minutes.

The Vita is severely underclocked to avoid overheating and to increase battery life. Hell, some games that run at the 444mhz clock can cause the Vita to get relatively hot to the touch, so clocking it higher would be asking for trouble.

Why does the New 3DS not have that issue?

 

[Tom Bombadildo]

Why does the New 3DS not have that issue?

You're not overclocking the New 3DS, either, you're simply letting "old" 3DS games run at the max speed New 3DS games run at.

 

[Kotomine Kirei]

You're not overclocking the New 3DS, either, you're simply letting "old" 3DS games run at the max speed New 3DS games run at.

What clock speeds do New 3DS games run at?

 

[Tom Bombadildo]

I have no clue, I know almost nothing about 3DS hacking. AFAIK it's 800mhz or something

 

[Kotomine Kirei]

I have no clue, I know almost nothing about 3DS hacking. AFAIK it's 800mhz or something

Okay.
I was just asking because it seems odd that the PS Vita would have overheating and battery life problems despite being underclocked, and that the New 3DS might not, despite running at a higher clock speed.

 

[Tom Bombadildo]

The 3DS uses an older ARM CPU that's not as powerful as the Vitas, hence why it can achieve higher clock speeds without overheating.

 

[Kotomine Kirei]

The 3DS uses an older ARM CPU that's not as powerful as the Vitas, hence why it can achieve higher clock speeds without overheating.

I see.
Thank you for clarifying.