Request

Index Word	Description
0	Header code [0x00030104]
1	NCCH Program ID
2	bool is_out_box?
3	message ID size (unused, always 8)
4	buffer size (unused)
5	Buffer Mapping Descriptor(R) = (message_ID_size << 4) \| 0xA
6	message ID address
7	Buffer Mapping Descriptor(W) = (buffer_size << 4) \| 0xC
8	buffer address

Response

Index Word	Description
0	Header code [0x00030084]
1	Result code
2	Read size
3	Buffer Unmapping Descriptor(R) = (message_ID_size << 4) \| 0xA
4	message ID address
5	Buffer Unmapping Descriptor(W) = (buffer_size << 4) \| 0xC
6	buffer address