Would it be possible to port 8086tiny (http://www.megalith.co.uk/8086tiny/) to the Nspire? (sorry if this isn't the right place for this thread)

Yes, i think so, and it would be an interesting project to play with. Apparently, all it requires is SDL support (and even that is an option). SDL has already been ported to Nspire long time ago by Hoffa.
Of course audio won't be available, but that's common to all SDL apps that have been ported to Nspire, so far.
Why don't you dare to give it a go?

One problem though is that it only uses SDL for the graphics output, it uses the console for text output.

It's been asked quite a few times before, the answer was, if I remember correctly, no.

8086tiny is a good idea though, since it's already ported on ARM. Rule of thumb: if it was already ported on the Raspberry Pi, it should be possible on the Nspire.

I did my bit of research after I posted this and yeah, there's versions of DOSBox for Android and Raspberry Pi, so yeah I guess one could try with an ARM-optimized fork. You could also try with Nspire Linux as well.

8086tiny would be interesting to port to the Nspire. I know an old Mac OS got ported and it ran well. It would also be interesting to see what program could be ran with 8086tiny.

Yeah the thing is that I never used it enough to remember what games can be played. I wonder if it could run stuff like old DOS games, such as Ultima series?

Ok good to hear. It would definitively expand the TI-Nspire library