My Amiga 4000 isnt openamiga compliant as I run Picasso96
P96 is CGX compatible, yes your A4000 meets that part of the OA spec :-)
And my A1200 isnt as that runs OS3.0 and doesnt have a graphics card.
Yup this falls short of the OpenAmiga requirement. (but you could add AOS3.1 and install CGX/P96 on it, since they are both available for the AGA A1200)
Does this mean they arnt Amiga's ] ;-)
No, it means that Aplications developed by developers following the OA guide lines might not work on your A1200. :-)