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There are several orphanend open-source projects aiming to support NetMD Walkman devices under Linux, namely:

libnetmd: A library to connect to NetMD Walkman - and

Patch for libnetmd to add support for MZ-RH1 and -RH10, also minor casting fixes:

gnetmd: A GUI for libnetmd -

Xmd: NetMD software for Mac OS X -

WinNMD: non-free Windows software -

FreeMD: how the NetMD protocol works, and a shell to set track titles etc.

The NetMD protocol is based on the AV/C Digital Interface Command Set, an 1394 TA specification:

  • 2004006 AV/C Digital Interface Command Set General Specification Version 4.2
  • 2004005 AV/C Tape Recorder/Player Subunit Specification 2.4
  • 2002013 AV/C Descriptor Mechanism 1.2
  • 2002002 AV/C Disc Subunit - Generic Recordable Video Disc Media Type Specification 1.0

Loading files on the MiniDisc Player, in particular the role of the EKB, is described in the US Patent 7228568 (retrieved via, which contains some hilariously bad cryptography (and is in any other way utterly trivial). This answers many, but not all, questions about the file transfer logs.

TODO: Check other Sony patents.

There is a funding project, supporting a resume of the development of the libnetmd software, see

netmdlinux.1240565824.txt.gz · Last modified: 2009/04/24 11:37 by marcus