PC Address SNES Address Bank Number 000200 008000 00 008200 018000 01 010200 028000 02 018200 038000 03 020200 048000 04 028200 058000 05 030200 068000 06 038200 078000 07 040200 088000 08 048200 098000 09 050200 0A8000 0A 058200 0B8000 0B 060200 0C8000 0C 068200 0D8000 0D 070200 0E8000 0E 078200 0F8000 0F 080200 108000 10 088200 118000 11 090200 128000 12 098200 138000 13 0A0200 148000 14 0A8200 158000 15 0B0200 168000 16 0B8200 178000 17 0C0200 188000 18 (From here on, pointers, that end with 4C and higher are used) To make it a little more understandable: There is no SNES Address, that ends from ..0000 to ..7FFF, the last four digits are always in a range from ..8000 to ..FFFF That goes for LoROMs. Since Yoshi's Island is a LoROM, it applies to the ROM.