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> Then you could do something like adding an emu.ini file next to the exe/com that sets things like memory and emulated hardware settings.

The standard DOS-extender feature for setting these modes is a Program Information File (.PIF extension).

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Honestly I was thinking similar but not exactly the same. More something with a VT-d memory map/port map so that the DOS application could potentially directly interface with legacy hardware without interfering or making the PIF incompatible. This has applications particularly in factories where they still use ISA interface cards with tooling etc. At the same time it would allow setting things like EGA/CGA compatibility requirements. Could you do it in the PIF? Probably, but I'd rather not risk breaking compatibility if possible. It's an idea only and would require research anyway assuming I actually had the time and energy to implement.

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