Liggy flash file types (orig, fast, rpc1) - what is the difference?

Sorry for this newbie question…

What is the difference between the Liggy NEC firmware xxxorig, xxxfast, and xxxrpc1 flash files?

-Thanks! LloydM

Why don’t you just have a look at the included readme.txt file? It should be present in all my modified NEC firmwares.

I would assume that original is the stock firmware, fast is riplock removed and RPC1 is region free.