firmware for Bitmain Antminer X3

Can you convert create custom firmware for this antminer to other algorithm? And what algorithm? And how efficient ?

I have 3 antminers only One X3, Oner D3, one A3 And 2 L3+.

Tell me for every asic what convert can you do ???

I don't know what you can do. Its possible yo convert from anything to anything ? I don't know the technology for my hardware to tell you what you can do. Its not my job.

I want to make custom firmware for this machines, make it profitable.