DesMuMe mods !!!

[dreampeppers99]

NHervé is very nice see your progress... You telling us your experience is great. Keep the good work...

[shashClp]

Originally Posted by NHervé

A new :

I think the 2D GFX system needs to be rewritten. It slows down the emu.
I started rewriting it. Now the emu is much faster (20-30 fps instead of 5 in the menu of New Super Mario Bros) but the screen is white, so the games aren't very playable :P:P.

Well, most of the official 2D system is quite broken. I added some acceleration by using an strange pixel blitter system (it gave about a 10-30% speed increase), but it's still slow. It could be accelerated by rewriting the mess of function call that it's currently, so good luck. Just remember to profile properly whatever you rewrite, so you don't end up having a slower system :P

By the way, what did the profiler told about the 2D core CPU usage? I mean, my profiling sessions showed other parts to be hell a lot more demanding :P

By the way, if you want to test your implementation robustness, check this. I remember I was able to pass 2/3 tests of revision 7 or 8 with my version, so I could help there. Official version passed 0/3 tests :P

[Lino]

My emu 6/6

[shashClp]

Originally Posted by Lino

My emu 6/6

Mario 64 looks better and faster on my emu XD No seriously, I'm happy some emulators pass all the tests, it's good to have accurate emulators

By the way, I wouldn't like this to become an emulator comparison :P

[NHervé]

thanks.

I don't understand anything from the old GFX core and the screen reversing is broken (ie PsgPlayer and ArmWrestler). This GFX core slows down the emu very much and the sky background, in the menu of New Super Mario Bros, is not correctly animated.

[shashClp]

Originally Posted by NHervé

thanks.

I don't understand anything from the old GFX core and the screen reversing is broken (ie PsgPlayer and ArmWrestler).(...)

Known, it's easy to fix.

EDIT: Bah, I just committed a fix to the official CVS, here you can see what I changed, from this file.

Originally Posted by NHervé

This GFX core slows down the emu very much

If you've sound enabled, keep in mind that it's the sound core eating CPU there. It had to be rewritten in fixed point, due to the abuse of ftol, but CyberWarriorX left the project before doing so. Use a cpu profiler like VTune and you'll see. If you disable the sound core by code, you'll get a huge speed up.

Originally Posted by NHervé

and the sky background, in the menu of New Super Mario Bros, is not correctly animated.

I don't have my DS here, but seemed correct, what's wrong with it?

[dreampeppers99]

Originally Posted by shashClp

If you've sound enabled, keep in mind that it's the sound core eating CPU there. It had to be rewritten in fixed point, due to the abuse of ftol, but CyberWarriorX left the project before doing so. Use a cpu profiler like VTune and you'll see. If you disable the sound core by code, you'll get a huge speed up.

It's so grateful see the tech conversation about DS emu...

[tomorrow will be 9th february... after new content on shash's blog]

[NHervé]

I start well. For the moment there is no image, only white screen when disabled, else red screen, and I tested armwrestler and psgplay, the red screen is at good place.

[shashClp]

Originally Posted by NHervé

I start well. For the moment there is no image, only white screen when disabled, else red screen, and I tested armwrestler and psgplay, the red screen is at good place.

I don't know what you mean, but the code that I committed yesterday to the official CVS fixes reserved screens on homebrew that doesn't care to setup screens properly I also tested a few commercial games, and naturally none is affected :P

(left screenshots is the old one, right one is the new one)

[NHervé]

Okay.
I'm rewriting 2d core and I included a new GPU struct, no more MainScreen.gpu and SubScreen.gpu. There are 2 gpus, gpuA and gpuB, each has an offset of 0 or 192. If bit15 of powcnt1 is clear the screens are reversed and so the gpus' offsets are also reversed.

[shashClp]

Originally Posted by NHervé

Okay.
I'm rewriting 2d core and I included a new GPU struct, no more MainScreen.gpu and SubScreen.gpu. There are 2 gpus, gpuA and gpuB, each has an offset of 0 or 192. If bit15 of powcnt1 is clear the screens are reversed and so the gpus' offsets are also reversed.

Ok, as you wish, I'll check and profile it whenever you release it. Good luck.

[NHervé]

My new GFX engine is far from complete, but it starts to work. I provided a screenshot of it running a text homebrew and displaying it correctly. I also provided a screenshot of PSGplay, it's displaying on the good screen but it is broken, it displays anything.

You'll notice I included DesMuMe icon in the screenshots.

[shashClp]

Nice. Just a question, did you profile the CPU usage of the 2D core before starting the rewrite? I'm curious if you got any numbers or you're doing this without them :P

[NHervé]

No, I don't.

[shashClp]

Originally Posted by NHervé

No, I don't.

And how did you know that the 2D core was the culprit?

[NHervé]

My 2d core is now supporting VRAM display. Here is a screenshot of ArmWrestler displayed on the good screen.

PS : sorry for poor colors, this is due to JPEG compression, but the bitmap files are too big.

[NHervé]

PS2 : shash : When I commented the code of the 2d core, the music of the menu of New Super Mario Bros was running faster, and the FPS was around 20-30.

[dreampeppers99]

Waiting for the mod2...

[Lino]

yes we are waiting.... release please

[NHervé]

I know why PsgPlayer is broken : it is using 16-color tiles, whereas my text demo is using 256-color tiles.

PS : I'll release it when my 2d core will be a little more working. Extended funcs such as rotscale will be implemented in mod 3.