svga_s3 and other modes not working

[Sporesirius]

I tried to change the machine type (svga_s3 and other). apparently only pc98* works.

When I try to use the svga_s3 mode (Browser Console output):

LOG: Early LOG Init complete
LOG: Logging init: beginning logging proper. This is the end of the early init logging
LOG: Logging: No logfile was given. All further logging will be discarded.
LOG: DOSBox-X version 0.82.7
LOG: Host keyboard layout is now us (US English)
LOG: Mapper keyboard layout is now us (US English)
LOG: SDL:Current window pixel format: SDL_PIXELFORMAT_RGB888
LOG: SDL: You are running in 24 bpp mode, this will slow down things!
LOG: USING AVI+ZMBV
LOG: Pentium CMPXCHG8B emulation is enabled
LOG: VOODOO LFB now at d0000000
LOG: ISA Plug & Play BIOS enabled
2 LOG: VGA ROM BIOS init callback
2 LOG: 12 ERROR BIOS:Keyboard layout file auto not found
LOG: XMS: 50 handles allocated for use by the DOS environment
LOG: EMS page frame at 0xe000-0xefff
LOG: COMMAND.COM env size: 720 bytes
LOG: COMMAND.COM environment block: 0x01e9 sz=0x002d
LOG: COMMAND.COM main body (PSP): 0x0217 sz=0x009a
LOG: COMMAND.COM stack: 0x0231
LOG: pixratio 1.350, dw false, dh false
2 Assertion failed: undefined

EDIT:
Hello, it's me again, I have now used your first build commands, but when I run dosbox-x I get the following in the Browser Console:

wasm streaming compile failed: LinkError: import object field '___cxa_call_unexpected' is not a Function
falling back to ArrayBuffer instantiation
failed to asynchronously prepare wasm: LinkError: import object field '___cxa_call_unexpected' is not a Function
LinkError: "import object field '___cxa_call_unexpected' is not a Function"
LinkError: "import object field '___cxa_call_unexpected' is not a Function"

EDIT:
Okay I fixed this error by setting emscripten sdk, clang etc. to incoming.
Now the problem is this:

Uncaught SimulateInfiniteLoop

[yksoft1]

Did you define -DEMTERPRETER_SYNC , use Emterpreter Sync building JS/WASM files and use the Emterpreter whitelist d3.txt?
Without Emterpreter Sync, you won't be able to run DOSBox's interactive shell at all, this is the case even for em-dosbox.

[yksoft1]

Meanwhile, I made static makefile in /make_em in recent commits to tree emscripten. It should work given Emscripten fully installed and EMSCRIPTEN_ROOT set.

[ZaDarkSide]

I can't seem to be able to compile.
What are the commands?

I have used:
git clone https://github.com/yksoft1/dosbox-x-vanilla-sdl.git
cd dosbox-x-vanilla-sdl
./autogen.sh
emconfigure ./configure <-- here I get configure: error: SDL 1.x or SDL 2.x is required to compile this program
make

[yksoft1]

I can't seem to be able to compile.
What are the commands?

I have used:
git clone https://github.com/yksoft1/dosbox-x-vanilla-sdl.git
cd dosbox-x-vanilla-sdl
./autogen.sh
emconfigure ./configure <-- here I get configure: error: SDL 1.x or SDL 2.x is required to compile this program
make

Don't use emconfigure. Refer to build_em.txt, or just use the static makefile in /make_em.
And you should git checkout the tree emscripten, as I didn't merge anything to master in many months.

[ZaDarkSide]

I have managed to compile it with instructions from build_em.txt, but it's unstable.

I get errors like RuntimeError: index out of bounds or Assertion failed: undefined or uncaught exception: abort("Assertion failed: undefined"). Build with -s ASSERTIONS=1 for more info. in browser console when running command dir /p or doing random stuff.

Also i need to type always mount c / to mount the preloaded file, is there an automated way to load the preloaded file? I've tried Module['arguments'] = ['mount c /'] it's not working.

[yksoft1]

I have managed to compile it with instructions from build_em.txt, but it's unstable.

I get errors like RuntimeError: index out of bounds or Assertion failed: undefined or uncaught exception: abort("Assertion failed: undefined"). Build with -s ASSERTIONS=1 for more info. in browser console when running command dir /p or doing random stuff.

Also i need to type always mount c / to mount the preloaded file, is there an automated way to load the preloaded file? I've tried Module['arguments'] = ['mount c /'] it's not working.

This is a known problem as there are still some calls in DOSBox DOS that may run out of sync randomly even if most of them are Emterpretified. I don't have enough time to deal with this as Emscripten offer absolutely no tools for debugging such situation.
for non PC-98 games, non-DOSBox-X DOSBox should be your choice for now.
If you want to automatically run things, use [autoexec] section in dosbox.conf.