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There are some discussion groups that you may find useful for Sim390 and MUSIC/SP. is an open group for the Hercules mainframe emulator. It has been reported that MUSIC/SP can run under Hercules. is a membership-by-request group for issues relating to running MUSIC/SP under Hercules (and it probably also accepts items about MUSIC/SP and Sim390 in general).

Click to join the H390-music group is a membership-by-request group for files relating to the MUSIC/SP Demo system. It contains the 6.2 base Demo system, updates for it, photos, manuals, etc.