0x10 ( 16 )  Core Boot
  
BitsDescription
7Reserved
6:2Cored ID
1Button DRIVE (divmmc) is pressed
0Button M1 (multiface) is pressed
BitsDescription
7Start selected core
6:5Reserved, must be 0
4:0Core ID 0-31 (config mode only)*

* A write of an out of range core id is ignored; this is the preferred way to determine max id