4:3 in DosBox on Raspberry Pi
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Hi guys, I am using Batocera but no one on the forums seems to know the answer to this. I notice Recalbox uses a similar version of Dosbox so I thought I'd give it a try here.
DosBox always runs at full width on my 800x480 HDMI 5" display, so everything looks stretched and wrong in wide screen and it should be cropped to 640x480. But how do I do this?
I found the dosbox.conf file to make changes with, but setting aspect=true doesn't fix the problem like it does on the desktop version.
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Are you sure? Or is it Batocera that uses a simular release of dosbox?
Please use Recalbox and you will have some support here.
"UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity." Dennis Ritchie
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@clint-hobson said in 4:3 in DosBox on Raspberry Pi:
I found the dosbox.conf file to make changes with, but setting aspect=true doesn't fix the problem like it does on the desktop version.
All I can say is that on Recalbox it should be enough and it works
Maybe you can try it on a spare SD card.
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I'm using Recalbox now, looks like the settings format is identical to Batocera and it was easy to find my way around - and I still can't get dosbox to obey any aspect ratio settings, not in the UI, and not in either of the two config files - dosbox.conf or dosbox-SVN.conf
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@clint-hobson you shouldn't modify those file but create a dosbox.cfg in your game directory, see there : https://github.com/recalbox/recalbox-os/wiki/How-to-use-DOSBox-to-emulate-DOS-games
still it's strange that it isn't working, works fine for me (but I'm on 16/9 screen)
you can try maybe with the custom dosbox.cfg linked in the wiki page
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@voljega But do you have black bars on the side of your screen so that the game is 4:3, or is it stretched to fill the full width of your screen?
This is what I'm seeing
This is what I want to see
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@clint-hobson yes I have the second one in real 4/3
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@voljega Ah ok, are you using a computer monitor, or TV, or one of those small HDMI displays for the Raspberry Pi (like mine? Mine's a 5" 800x480)
Can I see your dosbox.conf?
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@clint-hobson computer screen.
as I said you can see the dosbox.cfg from the wiki page I linked
there's a pastebin link -
@voljega And just to double check - are you running this on a Raspberry Pi? (or your desktop PC?)
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@clint-hobson pi3
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@voljega Wow ok. I just tried it the way you have it - connecting my Pi3 to my 16:10 computer monitor via HDMI, and simply changing "aspect=true" from the default conf above, does indeed work. It just doesn't work on my little 5" LCD... so weird...
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@Clint-Hobson
If the Hdmi goes over a TFP401 board to the screen, the TFP401 driver does not have a video scaler. Just as info. -
@dragu What's confusing me is - I thought the aspect correction was done by Dosbox - it draws an image to the display that is the full resolution of the display, and the image consists of the game content with black bars on either side - all drawn by Dosbox.
So it boggles my mind that the black bars disappear when I simply switch from my widescreen monitor to my 5" widescreen display. What is going on here?
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@Clint-Hobson everything is here for the configuration of you screen https://github.com/recalbox/recalbox-os/wiki/TFT5-Screen-HDMI-(EN)
"Remember, the TFP401 driver does not have a video scaler! If you don't feed it exactly 800×480 pixels the image will not stretch/shrink to fit! So we need to configure the resolution in the config.txt" -
@ian57 Wow - that was the problem after all this. Thank you
In my defence, it didn't appear that I needed these settings as the Recalbox front end looks perfectly fine - pixel perfect, no glitchy pixels due to wrong resolution, the full screen is used - and indeed, the other emulators have their own black bars on the side and are already aspect correct. It was only Dosbox with the problem. In fact I only went and applied these settings just to say I had, I didn't expect it to make a difference...
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@clint-hobson As always... RTFM
"UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity." Dennis Ritchie
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@ian57 True... but my understanding (from the "manual") was that these settings were for if your display isn't recognised or displaying incorrectly... so as it was displaying correctly for everything - the Recalbox interface, every emulator - except for one emulator, and only one aspect of that emulator, it seemed like the problem with the one emulator was what needed fixing.
It was an insidious problem... and I'm glad to have had the help from you guys to fix it.
