Re: New Performance Issue In Mac OS Catalina

Posted on 2020-04-10, 04:26

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by almeath

in DOSBox General

in DOSBox General

engdahl80 wrote on 2020-03-29, 15:16: Hi, I have searched for the 64-bit SDL2 build by Dominus that you mention. I have stuttering issues as well in Catalina. Could anyone link to it? Thank you. Can you PM me about this? The link to the SDL2 build was taken down: Source code for Dominus's DOSBox …

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Re: 0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 11:48

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by almeath

in DOSBox Development

in DOSBox Development

Catalina is mostly ok, but loosing all 32bit support bit me at least once, but I have another machine that now runs at 10.13. this one I use for building the snapshots. That is good to know, thanks. I will make sure I load it onto an external drive first, and do some thorough testing with my DOSBox …

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Re: 0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 11:40

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by almeath

in DOSBox Development

in DOSBox Development

Yes, I applaud and damn Apple for deprecating stuff. The OpenGl drivers for Nvidia and Intel have not been up to date for years and something broke when Apple deprecated OpenGl in 10.14. The crashes were pretty severe, taking out the whole graphics system which meant it crashed back to the login …

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Re: 0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 11:14

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by almeath

in DOSBox Development

in DOSBox Development

Btw. the reason I need to redo the release is that in macOS 10.14 and 10.15 surface was not working anymore correctly but the SDL devs finally fixed that. So I need to rebuild ;) More elaborate: If you built Dosbox and SDL on macOS 10.13 (or older) surface works in 10.14+. BUT OpenGl would crash on …

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Re: 0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 10:49

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by almeath

in DOSBox Development

in DOSBox Development

If it helps.. I have found the feature to be rock solid on my iMac under High Sierra and Mojave. It works great for Munt and also real MIDI devices.

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Re: 0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 10:47

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by almeath

in DOSBox Development

in DOSBox Development

Problem found: There is no way you could have successfully run it with any 0.74 version. The ability to use a named midi port has only been available in SVN and that only since May 2017 https://sourceforge.net/p/dosbox/code-0/4016/ I do have to redo the 0.74-3-1 release anyway, so I'll ask Qbix if …

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Re: 0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 10:46

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by almeath

in DOSBox Development

in DOSBox Development

Changing the version number changes the config file used. Ahh, you are right. I have been testing so many builds that I got confused. This is what works or does not for me: 0.74-2: NO 0.74-3: NO 0.74-3-1: NO Any SVN build (SDL 1 or 2) as far back as mid 2019: YES I also made sure to create a fresh …

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Re: 0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 08:43

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by almeath

in DOSBox Development

in DOSBox Development

The first thing that comes to mind is whether it is a 32bit vs 64bit thing. Is Munt in 64bit? I checked in the terminal and Munt is a 64-bit only app. I can see the 0.74-3-1 is a fat binary with x64,i386 and ppc. I looked in the Activity Monitor, and it is running in 64-bit when launched. I …

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0.74.3-1 for macOS not working with MUNT (MT32Emu)

Posted on 2020-04-08, 00:27

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by almeath

in DOSBox Development

in DOSBox Development

I have been successfully using the macOS version of MUNT (the latest version of the MT32Emu app) with DOSBox 0.74-3 on macOS Mojave 10.14.6. It is mapped to 'Mt32EmuPort' as follows: mpu401=intelligent mididevice=default midiconfig=Mt32EmuPort I downloaded and ran the latest 0.74.3-1 release and now …

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Re: Source code for Dominus's DOSBox SDL2 macOS 64-bit

Posted on 2020-04-07, 01:51

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by almeath

in DOSBox General

in DOSBox General

Yes, it is such a shame this happened. 🙁 Time to teach myself how to manually patch DOSBox SVN snapshots ... *sigh*

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Re: How do I properly use an SC-55 with a modern iMac?

Posted on 2020-03-18, 18:45

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by almeath

in Marvin \ Sound

in Marvin \ Sound

Audio out from your Mac to audio in on the SC-55, speakers to the SC-55, and you are already done. If you get noise from a ground loop, try connecting the SC-55 to a different outlet. Thank you both for your advice. This was a classic case of the answer staring me right in the face. I realized …

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How do I properly use an SC-55 with a modern iMac?

Posted on 2020-03-18, 14:57

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by almeath

in Marvin \ Sound

in Marvin \ Sound

I am seeking some advice about how to properly configure a Roland SC-55 Mk II to work with DOSBox on my iMac. I have no problem with the software settings - this is purely about the hardware setup. For background, my current setup is as follows: 1. 2019 iMac – it only has one 3.5mm jack (I do not …

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Re: New Performance Issue In Mac OS Catalina

Posted on 2020-03-13, 02:54

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by almeath

in DOSBox General

in DOSBox General

I only ask because the SDL2 SVN build seems to be the first build where enabling vysync actually has an effect in macOS. It works great in some games (i.e Epic Pinball, Lemmings Chronicles) but horribly in others (i.e Lemmings 2, Warcraft 2) where it causes major slow downs and sound problems. As it …

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Re: New Performance Issue In Mac OS Catalina

Posted on 2020-03-09, 14:49

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by almeath

in DOSBox General

in DOSBox General

In the SVN SDL2 build is there only an on/off for vsync with the vsync=true/false setting? Are there any granular settings that can be used like in earlier DOSBox versions? (I did search around, but there is not much to go on)

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Re: New Performance Issue In Mac OS Catalina

Posted on 2020-02-26, 01:56

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by almeath

in DOSBox General

in DOSBox General

that's really odd. Maybe vsync is enabled? That one setting has a drastic impact in the benchmarks I have run, for example it reduced the Quake FPS from 220 down to 40 (SDL2 build) I get the same result with metal and opengl. It can also cause sound problems (stuttering and/or slowdown) but it’s …

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Re: New Performance Issue In Mac OS Catalina

Posted on 2020-02-25, 01:42

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by almeath

in DOSBox General

in DOSBox General

When you upgraded to Catalina you lost the ability to run 32-bit apps, and the 64-bit version of DOSBox 0.74-3 is significantly slower than the 32-bit version. Have you tried the 64-bit SDL2 daily snapshot build by Dominus? I use this on my i9 iMac and I can get 200+ FPS on the Quake benchmark and …

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Re: Black screen and freezing in macOS

Posted on 2019-10-22, 16:18

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by almeath

in DOSBox Development

in DOSBox Development

That is really great, thanks for investing the time to set that up. I hope that it will get easier to apply the SDL2 patch in the future, so that it is not too much trouble for you to maintain it.

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Re: Black screen and freezing in macOS

Posted on 2019-10-21, 04:58

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by almeath

in DOSBox Development

in DOSBox Development

@almeath can you try this build? (edit: build removed, please use the SDL2 build in my signature) It's a several revisions old SVN built against SDL2. If that works, I can do more up to date ones in the future. Not only does that fix the problem, but the performance is far superior to the SDL 1 …

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Re: Black screen and freezing in macOS

Posted on 2019-10-19, 07:25

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by almeath

in DOSBox Development

in DOSBox Development

I have not yet had time to debug, but interestingly, the problem does not occur in the latest DOSBox-X. I might go with that as a work-around for the time being and wait to see if DOSBox 0.75 fixes this when released.

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Re: Black screen and freezing in macOS

Posted on 2019-10-11, 06:56

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by almeath

in DOSBox Development

in DOSBox Development

except it hangs when you return back if you use opengl right. I think the only thing we can do is try to debug it, to see where it hangs. Either with adding log messages or running an actual debugger. Yes, that’s right. The core issue is the freeze when switching back, but only with opengl. I will …

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