With this tutorial https://github.com/recalbox/recalbox-os/wiki/How-to-use-DOSBox-to-emulate-DOS-games

@riomanbearpig I suppose you are missing the corresponding cue files. Bin files need a cue file.

Doh, must have missed that when flicking through the wiki, I feel so dumb now Thanks @Substring for the point in the right direction! Helpful as always

@Pepe, I just turned off my firewall and it's working. Thanks for all the help, I now know a lot more about how this thing works. Hopefully I can help someone else in the future.

it's a buildroot system, so no modified distribution.