hmsa(1) Atari MSA / ST disk image creator and converter


hmsa diskimage [disksize]


Hmsa is little program to create compressed Atari MSA (Magic Shadow Archiver) and uncompressed ST disk images and to convert disk images between these two formats.

MSA and ST image format saving code is same as in Hatari itself.


If you give only one parameter, the file name of an existing MSA or ST disk image, this image will be converted to the other disk image format under a suitable new file name.

If the file does not exist and you give also a disk size:

Single Sided (360KB)
Double Sided (720KB)
High Density (1.44MB)
Extended Density (2.88MB)

An empty disk of the given size will be created.

Disk image format is recognized based on the file name extension (either .msa or .st).


Create a normal double sided empty ST disk image:
       hmsa DS

Convert an MSA format disk image to an ST format one:
       hmsa disk.msa


Written by Thomas Huth <huth at>. This manual page added by Eero Tamminen <oak at helsinkinet fi>.


This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.


This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.