{
  "RAM": 0,
  "ROM": 1,
  "SRAM": 2,
  "DEVICE": 3,
  "MAPPER": 4,
  "SLOT": 5,
  "REF_MEM": 6,
  "REF_DEV": 7,
  "IO_DEVICE": 8,
  "EXPANDER" : 9,
  "SHARED_MEM": 10
}