What would it take to get a dynarec into beetle-saturn?

General Development
#61

Probably not even releasing the actual source code but some of the tweaks only so he is the one that knows the sacred secrets lol. Later fooling everyone they make some mistake when compiling, it works perfectly on his side.

Seen this kind of crap happening, some chucklefuck takes over/hijacks a project, slaps his name in or renames the core completely like it’s their own, with a common motivation which usually is profit from another person’s work. And this usually kills the project for good. And the funny thing is they don’t have a clue wtf they doing.

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#62

There may have been cases of developers not sharing patches, but the bigger issue is that Yabause, Yabasanshiro, and Kronos all have changes that fix some things and break others. That code is available, but reintegrating all of it into one usable emulator and getting everything working would take a lot of effort.

I could try making a list of the games that don’t work and other bugs, but it’s a long list. I posted many issues above. I’d estimate it would take a good developer at least six months to a year to fix all of this, and I don’t have the time to dedicate to it right now.

Several people have offered to help fund this, so if there’s a developer who’s interested in working on this project, we can talk about sponsorship.

#63

Kronos removed all the hacks used in yabause/yabasanshiro, and has the highest accuracy/compatibility among those 3. Over 2145 tested games, 1982 were playable (92.4%). I don’t think you know much about Kronos.

#64

“Playable” is a bit subjective, as games are listed as playable even if there are glitches.

In another thread, someone complained that the graphical glitches in Sonic R were too much of a problem, although the game does run.

A lot of this turns out to be more complicated than it seems.

#65

Being accurate to original hardware is not a glitch, it’s funny how people forgot about wobbling on those early 3D consoles just because pgxp was implemented on psx emulators.

This is Sonic R in Kronos : https://youtu.be/xI4gOdWa6UY

The “really bad wobbling” in mednafen is exactly the same, and you’ll find the same “really bad wobbling” on original hardware : https://www.youtube.com/watch?v=HlCBR46W_Qs

“Playable” usually means it can be played without issues affecting gameplay, and it is not nearly as subjective as making false statements about an emulator. I have to really wonder if you ever tested it.

#66

Regarding what I was quoted on (and absolutely nothing else)

The issue with the floor in Sonic R on Kronos is not present in Beetle_Saturn, or moreimportantly real hardware. The video linked is not a great representation of what is happening, as the camera is flying around in this demo and you can’t even get a good look at the ground plane.

I’m not tainted by the existence of PGXP on PSX emulation, what I’m talking about in what was quoted has nothing to do with the standard polygon wobbling from these games. The entire floor texture is floating up and down like a raft on waves.

Which, again, isn’t present on beetle_saturn, or more importantly, real hardware. It’s an emulation inaccuracy. I can try to record a video of it, but if you boot the game, start a race on that first level, and run through the ruins past the bridge on the left and JUMP you will see exactly what I’m talking about there.

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#67

I tried the game before recording that video, and didn’t notice anything. I ended up recording the demo because i suck at this game.

Issues should be reported on the project’s github, not on a 3rd-party forum. Unreported issues are less likely to get fixed. Also keep in mind you need to use original resolution if you plan to make a valid comparison against mednafen or real hardware, upscaling is only gonna magnify any problem natively present in the game’s code.

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#68

To be fair it’s not a very ‘good’ game to start with haha, even if I love it.

It wasn’t my intention to report a bug, as I mentioned I was only here because I got quoted and my quote wasn’t understood. That’s a good idea though, I’ll track down the git and see how to open one.

#69

The project’s github is at https://github.com/FCare/Kronos/issues

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#70

I tried and i have no clue what you are refering to.

I have a feeling this is exactly as i suspected and you are making some invalid comparison by using upscaling.

#71

I’m sorry you can’t see it. Maybe there’s something different between what we are doing. To be clear, I am not upscaling for this comparison. I’m playing at native resolution, and comparing to my Sega Saturn with a real copy in the same room.

I appreciate the link, and if I get around to it, I will post a video; because I just pulled it up and confirmed I am still seeing it in Kronos, but not in beetle_saturn.

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#72

If you can’t post a video, can you at least post a screenshot with some arrow indicating where i’m supposed to look at ? Maybe i didn’t understand your instructions about the location.

#73

After further testing with many games it’s true that current state of Saturn emulation is dreadful except if you use a good fast desktop PC to run Beetle Saturn well. Tons of issues on Yabasanshiro on PC/Android. Random crashes, random slowdowns, many graphical issues and more. Beetle Saturn seems the better core except it won’t run well even on a Snapdragon 865, due to missing arm64 dynarec probably. Simple games like Saturn Bomberman run pretty good on a sd865 with Beetle Saturn, but others like Sega Rally won’t.

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#74

@SkyHighGam3r btw, i’m still looking forward to more information about this Sonic R bug in Kronos

#75

ymir also improved plus it has more conveniences like automatic gamepad support, fullscreen double click, CD speed etc For faster pcs it is also a viable option

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#76

Yes Ymir is the Saturn emulator to look for right now. Perhaps if it gets a dynarec it will be the top Saturn emulator, maybe even run well on something like the rk3566. Even now it looks like it’s the best on a good PC, my gamepad was automatically detected and configured, all games i tested run without issues. But no dynarec so you must have a good PC to run it without problems (for now).

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#77

If you want to play Saturn games on a low-end PC, mednafen standalone works okay. Part of the reason for its improved performance over other emulators is that it runs the VDP2 in a separate thread, thus taking advantage of dual-core CPU. This still isn’t good enough for something like rk3566. Perhaps with a dynarec and also putting SCSP in a separate thread along with VDP2, it could be usable on ARM devices.

I suppose another possible development path for Saturn emulation on mobile devices would be to start with Yabause with a working dynarec, and try to fix the VDP1/2 and SCSP issues.

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#78

Did some compatibility test with Die Hard Trilogy (USA) on Windows 10,

RA yabasanshiro, Standalone Yabasanshiro, SSF, Ymir (0.1.7 stable), RA Kronos

All fail, it hangs instantly. Game is only loading and playing properly on Retroarch Beetle Saturn on my tests.

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#79

Tried on Yabause RA and loaded and I can play the Game but only Sound when you are in the Option Screen

#80

Yes, the game is flagged as unplayable in Kronos : https://tradu-france.com/wiki-emu-compatibility/index.php?title=Modèle:D/Kronos

The european and japan versions are actually somehow playable though.