0x00000000 - 0x001fffff: ROM 0x00200000 - 0x0021ffff: flash ROM 0x00220000 - 0x003fffff: not used (mirror of flash ROM) 0x00400000 - 0x007fffff: hardware registers 0x00800000 - 0x009fffff: sound RAM 0x00a00000 - 0x00ffffff: not used (mirror of sound RAM) 0x01000000 - 0x01ffffff: system devices (?) 0x02000000 - 0x027fffff: not used (mirror of ROM) 0x02800000 - 0x02ffffff: not used (mirror of sound RAM) 0x03000000 - 0x03ffffff: system devices (?) 0x04000000 - 0x04ffffff: ??? 0x05000000 - 0x057fffff: video RAM 0x05800000 - 0x05bfffff: ??? (prolly not this large) 0x05c00000 - 0x05ffffff: ??? (filled with 0xff) (not 100% on location) 0x06000000 - 0x063fffff: ??? (stuff at beginning then 0x00) 0x06400000 - 0x066fffff: ??? (pseudo-chaotic stuff) 0x0c000000 - 0x0cffffff: RAM 0x10000000 - 0x10??????: tile accelerator 0x10800000 - 0x10ffffff: mirror of video RAM (write only) 0x14000000 - 0x17ffffff: G2 devices (?)