This a work in progress of DOS/DJGPP port of the DUGL (Dust Ultimate Game Library) https://github.com/FFK77/DUGL.
you can follow progress on https://github.com/FFK77/DJGPP-DUGL
what's amazing is that the original DUGL is an SDL2 port of the DOS Ultimate Game library, to make it cross-plateform
Linux/Windows (x86 CPU/SSE4.1)
As there is no SDL2 port to DJGPP in scope, I decided to backport all (what is possible) features of modern DUGL, 
to make it fully compatible with Window/linux DUGL version without SDL2, the old DUGL sources was a good starting 
point, as contain most of required SDL2/DOS functionnalities ...