i agree with patrik.
I have now both CV64 and CVPPC installed under AOS3.9 and you can't go
to 1280x1024 at 16 bit (slow even at 8 bit).
I've set a CV64 screen for PSA at 1152x900 at 8 bit but . . .
I use max 1024x768 at 16 bit even on CVPPC (8MB vram), go figure!