CSPPC memory have an higher proirity hence will be used first.
CSPPC= pri 40
mem om mobo= pri 30
pri -10 for ChipRAM
and IIRC Zorro2 is -30 or so. (i'm on MOS for PowerUP now...i'll check on AmigaOS)
Note- under MOS for PowerUP, 16Bit Z2 mem is not seen at all