Piru:
I haven't the slightest;I suppose reverse engineering?
Notice I never suggested that I have the knowledge ,expertise,or anything to do ports.
There are a few who go to extremes just to prove older hardware CAN do tasks either not envisioned or not implemented during the time such computers were new.
Sure commercial developers get to play with the new hardware months before it hits the stores but the hobbyist programmers had to wait,and often learn new tricks in programming;the dedicated hobbyist seldom counts the time spent in finding how to push performance,while his counterpart who is being paid must justify hours spent.
Owners of pre-G4 Mac might as well simply use the latest available MacOS release that works on their computer (or the latest linux available) and the best programs released for that computer during its commercially useful life-those programs that cost $500 to run on that $3500 Mac can both be found for pennies on the $ now.
Some people dumped classic Amiga hardware when it became commercially obsolete : as in the truckload of Amiga 4000s and Video Toasters I missed out on by minutes about 10 years ago.Seller accepted $100 just to get rid of that old stuff.
Businessmen depriciate the equipment and move on; it is only the hobbyists who see value in old cars,old computers,cancelled stamps,etc.