The short answer is yes. There are quite a few 83+ family emulators that have been released over the years. I suppose most of them could be ported with varying degrees of difficulty. If the platform it was written for is similar, that makes it easier. If the source code is available, that makes it infinitely easier. There were at least 2 I can recall that were written for the old nspire models, (by calc84maniac and Jacobly I think?) but neither were finished, and I don't think either of them were open source. So yes, possible, but likely not an easy undertaking.