Blitz2 or AMOS

[Daedalus]

I'll echo what others have said here - Blitz is far more flexible and advanced, and has so many advantages against AMOS that it's almost a non-brainer. If you ever want to do anything system-friendly, AMOS gets tricky quite fast. Blitz is still developed now, and there is a rather excellent set of includes now bundled with it which cover things like MP3 handling, AHI etc. If you're good with assembly it supports that (you can even include PPC assembly for PPC-equipped machines).

To answer your question, yes, Blitz supports CD32 and 2-button controllers, and the 4-player adaptor for the parallel port IIRC. And with the bundled includes it has most of the OS constants and scructs, so you can use OS calls relatively easily.

Check out HD-Rec for an example of system-legal Blitz software.

[Daedalus]

If you install a recent version of AmiBlitz (from http://www.amiforce.de) it has the full 2.1 manual in AmigaGuide format included. I also like to have the paper version, but it's nice to have the whole lot at your fingertips... And as Bloodline pointed out, the examples and tutorials are excellent, and have been added to a lot since toe 2.1 days. For example, if you load in any of the new includes, it will contain a small example which simply compiles and works, and is usually very easy to understand...