dos32a-ng

The DOSBox wiki only provides a vague statement: > Once a game uses this, it is expected to run faster and better in DOSBox. The references on Wikipedia could shed some light https://en.wikipedia.org/wiki/DOS/32 The most concrete I've noticed is https://web.archive.org/web/20171224010653/http://dos32a.nar... > DOS/32 Advanced DOS Extender provides full compatibility with Watcom C/C++ and features one of the most complete software emulations of DOS/4GW, thus allowing the users to "plug" it into the protected mode programs which use DOS/4G, DOS/4GW, DOS/4GW Professional and any other compatible DOS Extenders without the need to modify a single line of code. > > DOS/32 Advanced DOS Extender has been designed to be fast, flexible and reliable. It features very fast mode translation and interrupt servicing, ability to configure

A modern replacement for DOS/4GW is "DOS/32A". It's compatible and you can even patch out old binaries to replace DOS/4GW with DOS/32A. https://github.com/yetmorecode/dos32a-ng

Today, "DOS/32" replaces DOS/4G and can even patch out the older runtime in binaries. https://github.com/yetmorecode/dos32a-ng