Expansion Devices

• Use address space 0x04a40000 - 0x04a400ff

• Must be initialized by writing value 0x00 to address 0x04a40040

• Byte 3 of address space appears to be ignored (0x04a4ff00 == 0x04a40000)

• Data is “encrypted” via simple XOR

• • Decrypt: value = (byte ^ 0x17) + 0x17