And now thanks to multiple participants a pretty much fully featured SDL3 port to DOS!
https://github.com/libsdl-org/SDL/pull/15377

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A fully featured SDL3 port to DOS has been submitted as a pull request to the official SDL repository, supporting VESA 1.2 graphics cards and SoundBlaster 1.0 audio. The port uses DJGPP, a modern 32-bit protected mode compiler, rather than legacy tools like Turbo C. The implication is that any SDL-based project could theoretically be ported to DOS with minimal changes.

Post by @dosnostalgic.bsky.social — Bluesky