A test fork of joncampbell123's DosBox-X (https://github.com/joncampbell123/dosbox-x/) that should be able to build with vanilla SDL1 and SDL2.

I always build DosBox-X from source code and use either MinGW+MSYS or mingw-w64 environment.

Some of other programs rely on features removed from DosBox-X's in-tree SDL to work best in some older PCs, and I'm bored to build the in-tree SDL everytime I build DosBox-X.

I'll try to cherry-pick most PC-98 related features from joncampbell123's as I mainly use DosBox-X as a PC-98 emulator.

This port is VERY experimental and there are lots of unusable and disabled features.

It's only tested against some PC-98 games and a few selected IBM PC games, thus it's not ready to replace em-dosbox or other Emscripten DOSBox ports at all.

Please refer to build_em.txt for instructions using Autoconf to build.

Or use makefiles located in make_em and make_em-sdl1 directories. Remember to use "html" target to compile .bc file to HTML, JS and WASM files.

Make sure that your Emscripten environment had SDL2 port installed, and its emcc supports -s USE_SDL argument before trying to build this code.

Please note that this code may have some serious problems (resizing browser window destroys SDL surface) under Emscripten 1.38.20 or later with SDL2. Use older versions instead.