Ive never really been one to follow licenses, but am wondering what Poseidon having recently become open source means exactly ? Does it become effectively freeware ? Also I vaguely recall there being support for Amithlon dropped at one point. Is anyone able to elaborate to me why ? Reason I ask is that Id like to use it on my Amithlon machine and am wondering how to go about this ? Thanks in advance.
What Golem said is pretty much accurate. The APL'ed AROS sources of Poseidon can be used to do pretty much, including porting it back to 68k, including Amithlon. In fact, I'm pretty astonished that this has not happened yet.
However, the existing Amiga 68k versions of Poseidon (V1.x, V2.x, V3.x and V4.x) and their binaries remain what they were before, thus not covered by APL and certainly not freeware. It is still illegal to spread keyfiles.
About why dropping Amithlon support:
1) Amithlon is dead. It barely runs any recent PC hardware. Amithlon itself cannot be bought any longer, and probably >95% of the installations out there are pirate copies.
2) When dropping the keyfile scheme and locking it to E3B hardware, Amithlon was a casuality, too.