AmigaOS4 on Classic Amigas

[balrogsoft]

Hi, i found some information that i found on some webs about AOS4 and classic Amigas, i read on Amigawiki this about 68k emulation on OS4: "Programs which attempt to directly access the Custom Chipset may run an accelerated Classic Amiga, but not on the AmigaOne"

And i saw also this on intuitionbase:
"This is just to prove the video's I put online really are from my BPPC Amiga."
http://www.intuitionbase.com/screen/Workbench%20Screen_800x600x16.png

And this:
"This is OS4 running on my (Ryu) BPPC A1200, its nice and fast, much faster than OS3.9 on my 040 and its running quite well on my Bvision... In the grab you can see DvPlayer, RoadShow prefs (the new TCP/IP stack), AmIRC and AmiDock with an assortment of apps in. Im really enjoying OS4."
http://www.intuitionbase.com/screen/OS4BPPC.png

It seems that exist a prerelease version for classic Amigas, can someone confirm then the use of custom chips on classic Amiga using AmigaOS4, because Amigawiki says "may". Because maybe i upgrade an A1200 and the compatibility is very interesting with OS4.

[balrogsoft]

Well, is good to know that OS4 for classic machines have at least AGA support for compatibility, i will wait to PowerVixxen or SharkPPC, but if finally PowerVixxen or SharkPPC is not released, PPC is a good option for me, i want compatibility for my upgraded 1200.