> I can't imagine AMD would want to give up detailed info on their graphics hardware

That wouldn't have been the case. The chip was supposed to be two HBM2-linked dies put together into one processor package. No GPU internals required to be revealed to Intel for this.

>> focussing now on GCN5 or even RDNA may make sense.

> Or even RDNA2.

Are there any RDNA2-based APUs or graphics cards out yet that MorphOS developers could now put their focus on?

> jumping over the Radeon HD69XX series

It's good that TeraScale 3 support will be omitted, if true. I'm curious what Bigfoot will jump to from TeraScale 2.

> moving straight to RDNA support seems to be the most practical.

I still would like to see GCN4 support for those potential dual booters. But let's see what Hans will go/jump to next, GCN5 or RDNA :-)