The Amiga version of Pure Basic is now open source. This is the email of Fr?d?ric Laboureur

As the AmigaOS version of PureBasic is not actively supported anymore, we decided to open as much code as we could do. Therefore, the whole commandset of PureBasic (beware, written completely in 680x0 assembly), the IDE and some other tools are available for modification. As the compiler source is shared between all the versions of PureBasic, it remains closed.
If you do a bug fix, an improvement or anything else which could make PureBasic for AmigaOS better, don't hesitate to send us your patch, it will be included in the next release.
We don't plan to work on the AmigaOS libraries anymore, but the compiler has been ported using the lastest v4.00 branch, so we will support any future version of the compiler, but without implementing CPU specific features. For example, the "Macros" are available on AmigaOS 4.00 compiler, as it's a compiler feature, but "quad" and "double" are not, as they need a CPU specific implementation.

And before you ask, the guide says:
- 68000 and 68020+ support (PowerPC support in progress).