typh0id wrote on 2026-07-06, 16:37:

Windows 3.11 no longer displays stretched to full screen in DOSBox like it always has before.

No info what it displays currently

Mov AX, 0xDEAD wrote on 2026-07-06, 16:48:

typh0id wrote on 2026-07-06, 16:37:

Windows 3.11 no longer displays stretched to full screen in DOSBox like it always has before.

No info what it displays currently

I put everything I could think of in the attachments, including DOSBox settings and Win3.11 display settings. What else would help that I missed?

It looks to be displaying Windows in 800x600 without scaling it to my monitor's full screen. Again though, it's ONLY Win3.11 that's doing this. Everything else in DOSBox scales correctly.

Hi,

While this is unlikely to affect only Win 3.11, but some video card/driver combinations have problem with aspect ratio correction with certain configurations, try to change output=overlay to output=ddraw if running DOSBox on Windows or output=opengl if running DOSBox on Linux.

EDIT: If none of these works you might also try appending "forced" to the scaler configuration variable.

MagefromAntares wrote on 2026-07-06, 19:12:

Hi,

While this is unlikely to affect only Win 3.11, but some video card/driver combinations have problem with aspect ratio correction with certain configurations, try to change output=overlay to output=ddraw if running DOSBox on Windows or output=opengl if running DOSBox on Linux.

EDIT: If none of these works you might also try appending "forced" to the scaler configuration variable.

So that technically DID work (the ddraw thing - thank you for that!) however now the picture quality looks worse. By that I mean the pixels no longer look uniform giving everything a distorted appearance. I tried the forced scaler too but still distorted.

typh0id wrote on 2026-07-06, 20:45:

MagefromAntares wrote on 2026-07-06, 19:12:

Hi,

While this is unlikely to affect only Win 3.11, but some video card/driver combinations have problem with aspect ratio correction with certain configurations, try to change output=overlay to output=ddraw if running DOSBox on Windows or output=opengl if running DOSBox on Linux.

EDIT: If none of these works you might also try appending "forced" to the scaler configuration variable.

So that technically DID work (the ddraw thing - thank you for that!) however now the picture quality looks worse. By that I mean the pixels no longer look uniform giving everything a distorted appearance. I tried the forced scaler too but still distorted.

I would guess that you are running DOSBox on Windows 11 (or some of the later updates broke it on Windows 10 too), sometimes the ddraw setting behaves weirdly on that version of Windows, however if overlay also doesn't work I now don't have an idea how to make it work with regular DOSBox. You can try DOSBox-X, that version has a new output setting output=direct3d that might work even on Windows 11, it uses the Graphics Cards 3D pipeline instead of the 2D acceleration to display.

OpenGL is an option in Windows, it's just a matter of host driver support, and Nvidia is almost certain to support it, so definitely do try output=opengl. You might or might not prefer a blockier appearance with output=openglnb, which uses irregular virtual pixel sizes rather than interpolation. Also, in DOSBox SVN you can use output=opengl scaler=none glshader=sharp for nicely sharp scaling that is offloaded to the video card.

ripsaw8080 wrote on 2026-07-07, 03:08:

OpenGL is an option in Windows, it's just a matter of host driver support, and Nvidia is almost certain to support it, so definitely do try output=opengl. You might or might not prefer a blockier appearance with output=openglnb, which uses irregular virtual pixel sizes rather than interpolation. Also, in DOSBox SVN you can use output=opengl scaler=none glshader=sharp for nicely sharp scaling that is offloaded to the video card.

=opengl looks a lot better! The picture is overall a little bit "softer" than I'm used to (pixels aren't quite as crsip) but I it looks way better than how it did with ddraw (openglnb looks similar to that). I admit that in well over a decade that I have been using DOSBox, I have never ventured outside of the vanilla builds. I've spent so much time fine-tweaking the performance of every single game I run that I've always bee afraid if I were to switch versions, some of them suddenly not might run the same and I'd have to go back through them all again. Also I looked up DOSBox SVN and there are even multiple different versions of that that which come up in Google so I don't really know where to start.

typh0id wrote on 2026-07-07, 11:24:

Also I looked up DOSBox SVN and there are even multiple different versions of that that which come up in Google so I don't really know where to start.

A good (compared to EmuCR) Windows SVN build via IA: https://web.archive.org/web/20240430023008/ht … SBox%20r4482.7z

ripsaw8080 wrote on 2026-07-07, 12:07:

typh0id wrote on 2026-07-07, 11:24:

Also I looked up DOSBox SVN and there are even multiple different versions of that that which come up in Google so I don't really know where to start.

A good (compared to EmuCR) Windows SVN build via IA: https://web.archive.org/web/20240430023008/ht … SBox%20r4482.7z

Much appreciated! I'll check this out.