Memory Layout: 
0x8c000000     16 Mbytes RAM 
0x8d000000 

0xa0000000     2 Mbyte Boot ROM 
0xa0200000     256 kByte Flash ROM 
0xa0400000 

0xa05f8000     Hardware Register (Video) 

0xa0700000     SPU Register 
0xa0800000     2 Mbyte Sound RAM 
0xa0a00000 

0xa1000000     Parallel Port 
0xa2000000     CD-ROM Port 

0xa5000000     8 Mbytes Video RAM 
0xa5800000