but I do not understand those who wants to ADD stuff to AGA.. why. there is simply no reason whatsoever to do that.
It's possible to add things to AGA without breaking how software access and see AGA - faster chip RAM access, de-interlacing, new modes (like HighGfx is already doing), better HAM implementations etc. Ideally I want an improved AGA for doing animations using old tools like DPaint, Briallance etc. Old AGA _can_ do 1280x720 HAM8 animations, but it is borderline within chip ram limits and annoyingly sluggish. More and faster ChipRAM can help with this (as demonstrated using UAE and for that matter, FPGA Arcade).