Saturn CPU Structure at 08003340 contains u32 Read[257]; Saturn -> ARM mapping table u32 Write[257]; armptr = Read[saturnptr >> 12] | ((saturnptr & 0xfff) >> 1); "standard" Saturn mapping: 00000 -> 00060000 ... ROM 7ffff -> 0009ffff 80000 -> 08040000 ... RAM fffff -> 0807ffff