I believe you need WinG installed to use DCI.

If the game has a CD audio track then you'll need to use the appropriate switches when mounting the CD or you'll need to make a bin/cue image of the CD and use imgmount to mount the CD before starting Windows 3.1.

You may also need to set up something for CD Audio in the Sound section of the Control Panel in Windows 3.1. Can't remember...

Hello DosFreak, yes, I already install the WinG but that does not fix the problem, I mounted the image correctly, but the problem must be something else. How do I use in Windows 3.1 the cda?

Now, the cdaudio in windows 3.1 works(I had forgotten to install the corresponding driver), but the game still will not let me playing in hi-res mode, the same problem as mentioned above (the "DCI Capability error"), some help with this?
Thanks 😉

The game might want hardware overlay support.

http://stason.org/TULARC/pc/video-faq/54-What-is-DCI.html

What is DCI? DCI stands for "Device Control Interface." It's an Intel/Microsoft standard, and exists primarily as a way for Wind […]
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What is DCI?
DCI stands for "Device Control Interface." It's an Intel/Microsoft standard, and exists primarily as a way for Windows 3.1 to exploit the video acceleration features of a graphics card, and/or to provide fast video when needed -- for example, the WinG games library uses DCI. A DCI driver exists at the same software layer as the GDI.

Among DCI's capabilities are the ability to write directly to the frame buffer (helpful for high-speed games) and the ability to provide for on-board hardware acceleration of video scaling (i.e. stretching a video window to a larger size) and color space conversion (converting the YUV format color information in a video file to the RGB format that a typical graphics card RAMDAC expects). Note that support for DCI features doesn't need to be in hardware -- a graphics card vendor could provide a DCI driver that allowed Windows 3.1 apps to speak DCI, but the graphics card could be performing the DCI functions with a software driver.

Note: with Windows 95, DCI will be replaced by an expanded interface called DirectDraw.

Mmm, then the problem of the DCI is the driver of the S3?

DOSBox has no hardware overlay.

Ah, then that is the error?, DOSBox is incompatible with DCI because the hardware overlay?
Well, then i play the game on low-res 😉

You could try to install the S3 Trio64v+ driver instead of the one recommended in the guides.

Ok, i will try it, thank you so much for your help 😉