Poor lr-mess performance with Ti99_4a on Pi3B+
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Sorry... thought this one fit more in the Development area when I posted it.
Thanks! :)
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Just noticed it's the same for many of the hand-held games working in lr-mess as well...
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@jamrom2 said in Poor lr-mess performance with Ti99_4a on Pi3B+:
Just noticed it's the same for many of the hand-held games working in lr-mess as well...
For handheld games you must use AutoFrameSkip.
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@DTEAM I see what you mean for the handhelds. Frameskip +10 works great for Caveman.
I wonder if we should to the same for the Ti99_4a?
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what is your experience of autoframeskipping vs frameskip 10 with pressing these keys in ti99_4a ? :
- F11 => show frames
- F9 => increase frameskipping
- F8 => decrease frameskipping
I can add it for the non-basename lines if we need to.
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@Folly I wonder if it's something that can be fixed this way or the way MAME emulates the Ti99_4a?
I'll try this and let you know in a moment.
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@Folly No change of the performance at any setting.
0/10 or 10/10.
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So there is no need to add frameskip 10 loaders then.
What is your framerate ?
Have you tried to lower your resolution in the startup-gui ? -
@Folly How do I display the framrate? I see it via F11 as around 45% if that's it. Usually it's a rolling number right.
Yes, changing resolutions, turning off overlays, shaders.. etc. has no effect.
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Ok,
Probably you are out of luck and you need to get a RPI4.
I would buy a 8GB version because it can run on 1,8Ghz in default in the new bullseye distribution. -
Don't you have an old x86 or x86_64 computer lying around ?
I would try it on that. -
@Folly No, definitely don't. Lol.
I was wondering if it would be worth asking someone on the Librettro team to have a look at this...or even from MAME. It's odd to me that it's only the Ti99_4a that gets beat-up like this. All the other computers from this era seem to work fine.
I suppose nothing will come out of it, but it's worth a try to ask.
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It has to be addressed in mame if possible.
After that it will automatically go into the libretro core.You should make an account here and discuss the problem :
https://forums.bannister.org/ubbthreads.php?ubb=postlist&Board=1It's troublesome to get your username activated.
You probably need to email to get it activated, just like me.
Then you can search the forum.I have an account too but I can't post anything so far.
Edit:
I did a search for you but could not find anything useful. -
Have you tried the slider functions ?
Underclocking or overclocking the cpu ?Perhaps not ideal but have you ever tried running your RPI3 from CVBS instead of HDMI.
CVBS could improve speed also. -
@Folly what is cvbs?
I will try the sliders... I used them on one of the handheld games which seemed to help, but it doesn't save.
I didn't want to have to change the basic build too much to fit one system. I'd rather keep it simple if possible. End result is most likely I buy a Pi4.
It's just bugging me because I know how old the Ti99 is as compared to the Apple IIe and Tandy. So you would expect the same results, but I know that's not always the case with emulation.
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For every system in mame there is a driver.
Some of them are better than others, thats just how it is.CVBS is the composite video output.
With the early raspberry pi 1 it was the yellow connector :
https://cdn.instructables.com/ORIG/FBD/EEDO/HZCJ4PQM/FBDEEDOHZCJ4PQM.jpg?width=2100Now it's in the jack plug, so you need to have a cable for that.
And you need a TV that can handle old composite video.
You have to use a cable like this :
https://tinkersphere.com/1906-thickbox_default/raspberry-pi-a-plus-b-plus-composite-to-rca-adapter.jpgOld camcorders, for example, used these cables also but some of them have colors swapped. So when using such a cable you have to measure how it's connected.
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[...] CVBS could improve speed also.
Why do you think it will ?
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Well I have had some experience with it a couple of years ago with some emulators I don't remember anymore.
When using it it back then it definitely improved the speed.
But honestly I don't know if it will work with mame, so this has to be tested. -
@Folly There's nothing that inherently favours using the analog video jack over the HDMI one. You may had better experience with a lower resolution, but I don't see how using one over the other would improve emulation.
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You are probably correct.
Edit:
I was curious and just searched my RPI3 and CVBS cable.
Luckily I was up and running quite fast.You are correct, I just doesn't help.
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