Minor Description
This feature (introduced only for NTVDM for now) leverages some tricks we use for compiling our (16-bit) bootsectors. Since we can only compile single ASM files without being able to link them, for 16-bit compilation, we need to create a big one ASM and stuff everything in it. Or we can take a middle approach by using multiple ASM files such that when being concatenated in proper order the resulting ASM file is compilable and doesn't need linking.
This is obviously improvable so don't hesitate to play with it.