$000000-$07FFFF Chip RAM
$080000-$1FFFFF Reserved
$200000-$5FFFFF Fast-RAM (4Mbyte)
$600000-$9FFFFF PCMCIA (4Mbyte)
$A00000-$BEFFFF Reserved
$BFD000-$BFDF00 PIA B (even addresses)
$BFE001-$BFEF00 PIA C (odd addresses)
$C00000-$DFEFFF Reserved for expansion
$DFF000-$DFFFFF Custom chip registers
$E00000-$E7FFFF Reserved
$E80000-$EFFFFF Expansion ports
$F00000-$F7FFFF Reserved
$F80000-$FFFFFF System ROM
Whats to stop you using some of the reserved areas for fast RAM? Would it require more than patching the kickstart memory allocation routines to "see" your extra RAM? Its not like the classic Amiga memory map is going to evolve any further...
