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

libnetmd: A library to connect to NetMD Walkman - http://libnetmd.sourceforge.net/ and http://www.unmaintained-free-software.org/wiki/Libnetmd

Patch for libnetmd to add support for MZ-RH1 and -RH10, also minor casting fixes: http://users.physik.fu-berlin.de/~glaubitz/linux-minidisc/0001-cast-fixes-MZ-NH600-MZ-RH1-MZ-RH10-support-adde.patch

gnetmd: A GUI for libnetmd - http://www.pdr.cx/projects/gnetmd/main/

Xmd: NetMD software for Mac OS X - http://www.sorted.org/Xmd/

WinNMD: non-free Windows software - http://winnmd.net/

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

• http://www.marcus-brinkmann.de/files/freemd.html
• http://software.marcus-brinkmann.org/projects/show/freemd
• bzr branch http://bzr.marcus-brinkmann.org/freemd/trunk/ freemd

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

There is a funding project, supporting a resume of the development of the libnetmd software, see http://www.cofundos.org/project.php?id=122.