Scroll to navigation

FSED.CPM(1) User commands FSED.CPM(1)


fsed.cpm - edit a CP/M file system


fsed.cpm [-f format] image


fsed.cpm edits a CP/M file system on an image file or device. It knows about the system, directory and data area, using sector skew on the last two. Directory entries are decoded. The interactive usage is self-explanatory.


Use the given CP/M disk format instead of the default format.
libdsk driver type, e.g. tele for Teledisk images or raw for raw images (requires building cpmtools with support for libdsk).


Upon successful completion, exit code 0 is returned.


Any errors are indicated by exit code 1.


CPMTOOLSFMT Default format


/etc/cpmtools/diskdefs CP/M disk format definitions


This program is copyright 1997–2012 Michael Haardt <>. The Windows port is copyright 2000, 2001, 2011 John Elliott <>.

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 3 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.

You should have received a copy of the GNU General Public License along with this program. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.


fsck.cpm(1), mkfs.cpm(1), cpmls(1), cpm(5)

October 25, 2014 CP/M tools