0xBF402004 - N-Command code (write)
0xBF402005 - N-Command status (read)
0xBF402005 - N-Command data (write)
0xBF402006 - N-Command error (read)
0xBF402006 - N-Command mode (write)
0xBF402007 - N-Command abort (write)
0xBF402008 - Interrupt register (read/write)
0xBF402009 - ? (write)
0xBF40200A - CD/DVD status (read)
0xBF40200B - Media change ? (read)
0xBF40200F - CD/DVD Disc type (read)
0xBF402013 - ? (read)
0xBF402016 - S-Command code (write)
0xBF402017 - S-Command result (read)
0xBF402018 - S-Command parameters (write)
0xBF402038 - CD/DVD key status (read)
0xBF402039 - CD/DVD key xor value (read)
0xBF40203A - DEC (write)
