cw2dmk(1)                                                            cw2dmk(1)

Name
       cw2dmk  -  Read  a floppy disk using a Catweasel controller and make an
       exact copy in DMK format

Syntax
       cw2dmk [options] filename.dmk

Description
       The cw2dmk program uses the Catweasel universal floppy disk  controller
       to read a disk and save its contents to a file.  The save file is writ-
       ten in the DMK format first used by some TRS-80 Model I/III/4/4P emula-
       tors.   The  disk  is exactly reproduced, including the positioning and
       spacing of sectors and the content of gaps, so that even so-called copy
       protected  disks  can  be  read correctly and will work with emulators.
       Currently, cw2dmk can read all formats that can be written by the West-
       ern  Digital  177x/179x  disk  controllers  used in the original TRS-80
       machines, all formats that can be written  by  the  NEC  765-compatible
       floppy disk controllers used in PCs, and the Digital Equipment Corpora-
       tion RX02 format.

       The cw2dmk program automatically recognizes most  variations  of  drive
       type and disk format, but you can override this autodetection with com-
       mand line arguments; see below.  Detection of FM  (single  density)  or
       MFM  (double/high density) encoding works even for disks that have some
       sectors in each encoding on the same track, such  as  disks  that  were
       made to boot on both TRS-80 Models I and III.

       Versions  of  cw2dmk exist for both Linux and MS-DOS.  On Linux, cw2dmk
       must be run as root.  If the program is made setuid to root,  it  drops
       its  root  privileges as soon as it has obtained access to the block of
       I/O ports it needs to directly access the Catweasel.   On  Windows  95,
       cw2dmk.exe  can  be  run  in  an  MS-DOS  Prompt box.  On plain MS-DOS,
       cw2dmk.exe needs the program cwsdpmi.exe  (included)  to  provide  DPMI
       functionality;  make  sure it is in the same directory as cw2dmk.exe or
       in another directory on your path.

       cw2dmk accesses the hardware directly, so it must not be  used  at  the
       same time as any other Catweasel software.  In particular, on Linux, do
       not load Michael Krause's "cwfloppy" driver at the same  time,  and  on
       MS-DOS, do not load the "catbase" driver that comes with the Catweasel.

       For  more information about the Catweasel controller and other software
       that works with it, see:
           http://www.jschoenfeld.com/
           http://www.soundtracker.org/raw/

       For information about the DMK file format and the  emulators  that  use
       it, see:
           http://discover-net.net/~dmkeil/
           http://www.tim-mann.org/xtrs.html

Options
       -d drive
              Specify  the  drive  unit  number,  0  or 1.  Specify -1 to have
              cw2dmk try drive 0 first, then drive 1 if drive 0 does not  seem
              to exist.  The default setting is -1.

       -v verbosity
              Specify  how much output is printed.  Larger numbers select more
              output.  The default setting is 2.  You can  ask  for  different
              amounts  of  output  to be logged to a logfile and to the screen
              (i.e., stdout) by giving a two-digit number.   The  first  digit
              specifies  how much output to log to the logfile, the second how
              much to log to the screen.

              0      No output.

              1      Print a summary at the end of conversion.

              2      Also print the number of good sectors and errors on  each
                     track.   When  a  retry  is  needed,  print the number of
                     errors on the previous try and the retry number.

              3      Also print the sector numbers, plus a  short  message  in
                     brackets  when  an  error  is  encountered  or the FM/MFM
                     encoding detector fires.

              4      Also print the track IDs and DAMs (data address marks).

              5      Also print all data in hexadecimal.  Print "{" and "}" to
                     indicate  where  the  index  hole sensor went on and off.
                     Print "(-N)" or  "(+N)"  where  the  decoder  dropped  or
                     duplicated  N clock/data bits in an attempt to resynchro-
                     nize itself with the data bit and byte boundaries.  Print
                     a  "?"  before  any  byte  where a clock was unexpectedly
                     missing or unexpectedly present even after the resynchro-
                     nization heuristics were applied.

              6      Like 4, but also print the data as raw characters.

              7      Like  5,  but  also  print  the  histogram generated when
                     autodetecting the drive and media type,  and  print  each
                     Catweasel  sample  and  its  classification as short (s),
                     medium (m), or long (l).  Enclose the decoded hexadecimal
                     data  bytes in angle brackets ("< >") to distinguish them
                     from the samples.

       -u logfile
              Specify the filename to log output to.  The default  is  not  to
              log  to  a  file  unless you give a two-digit -v option.  If you
              give a two-digit -v option and do not give the  -u  option,  the
              default  logfile  name  is formed by stripping any extension off
              the DMK file name and appending .log instead.  If you  give  the
              -u  option with a one-digit -v option, the same output is logged
              to the file and to the screen.

       The remaining options are usually not needed.  cw2dmk  will  ordinarily
       detect or guess the correct values.

       -p port
              For  the  Catweasel MK1 (ISA), port should be the I/O port base,
              or 0 to default to  the  factory  setting  of  0x320.   For  the
              Catweasel  MK3  or  MK4  (PCI),  port  should be 0 for the first
              Catweasel card in the machine,  1  for  the  second,  etc.   The
              default is 0.

       -k kind
              Specify the type of drive and type of media in use.  This option
              is generally not needed, as cw2dmk should  always  autorecognize
              the  correct value.  You can use it if you want to eliminate the
              slight delay for autodetection, or in the special case where you
              want  to  treat  a  3.5-inch high density disk as an 8-inch disk
              (ignoring the last 1/6 of each track) by giving the  -k3  option
              where  -k4  would  have been the autorecognized value.  Possible
              values:

              1      5.25-inch SD/DD disk in 1.2MB drive

              2      5.25-inch SD/DD disk in 360KB/720KB  drive,  or  3.5-inch
                     SD/DD disk

              3      5.25-inch HD disk, or 8-inch SD/DD disk

              4      3.5-inch HD disk

       -m steps
              Step  multiplier,  1  or 2.  A step multiplier of 2 is used when
              reading a 40-track (or 35-track) disk in an 80-track drive.   If
              this  option  is  not  given,  cw2dmk guesses a likely value and
              checks its guess by trying to read the first few tracks.  If the
              guess  appears  to have been wrong, cw2dmk will use the opposite
              value instead.  Giving this option will speed up cw2dmk slightly
              by  eliminating the time to check the guess, and will remove the
              small possibility that the guess is wrong even after having been
              checked  (which  can  happen only with copy-protected disks that
              are formatted with  nonstandard  track  numbers).   The  initial
              guess is 2 if the drive/media type (-k option) is set or autode-
              tected to be 1; otherwise the initial guess is 1.

       -t tracks
              Specifies the number of tracks per side.  If this option is  not
              given, cw2dmk will guess 43 if the -m option is set (or guessed)
              to be 2, otherwise 86.  If cw2dmk is operating  with  a  guessed
              value  for  -t,  and the next track after one of the more likely
              ending places (35, 40, 77, or 80 tracks) has no valid sectors or
              has the same logical track number as the previous track, it will
              lower its guess and immediately stop reading at that point.

       -s sides
              Specifies the number of sides.  If this  option  is  not  given,
              cw2dmk  will guess 2 sides if the second side appears to be for-
              matted, then revise its guess to 1 side if there  are  no  valid
              sectors  on  the  first track or two of the second side.  Giving
              the -s1 option explictly for a single-sided disk will  save  the
              time needed for this autodetection.

       -w fmtimes
              Normally, FM bytes are written into the DMK file twice (-w2), so
              that they take up the correct proportion of the space on  mixed-
              density tracks.  You can set -w1 to cause FM bytes to be written
              only once.  This does not save space in the DMK file unless  you
              also reduce the track length with the -l option.

       -e encoding
              Overrides  the normal FM/MFM/RX02 autodetection.  To try only FM
              decoding, specify -e1; to try only MFM, specify -e2; to try only
              RX02,  specify  -e3.  Using this option does not speed up cw2dmk
              appreciably; however, it can  help  on  noisy  disks  where  the
              decoder  occasionally  makes an error because it has to take all
              three possible encodings into account.

              Additional notes on DEC RX02 disks: These disks use  a  nonstan-
              dard encoding for double density.  A slight extension to the DMK
              format is used to represent them: Bit 5 (previously  unused)  is
              set  in  the DMK header's options byte (byte 4).  The DMK double
              density flag (bit 15 of the IDAM pointer) is not  set  for  RX02
              double  density  sectors,  on the grounds that only the data and
              CRC are in MFM, not the ID, DAM, gap, etc.  A program reading  a
              DMK  with the RX02 option bit set should expect a sector to con-
              tain twice as many valid data bytes as its sizecode indicates if
              the sector's DAM is 0xf9 (deleted RX02 MFM data) or 0xfd (normal
              RX02 MFM data).  Note that as with other disk  types,  FM  bytes
              are written to the DMK file twice unless you set the -w1 option,
              while MFM bytes are written only once.  RX02 autodetection  will
              fail  if the first track with RX02 sectors has only deleted data
              (0xf9 DAMs).  This is unlikely to occur, but using -e3 will work
              around the problem if it does.

       The following are special options for dealing with hard to read disks.

       -x retries
              While  reading a track, cw2dmk tries to recognize sector IDs and
              sector data, and it checks that each ID has a corresponding sec-
              tor  and  that  both  have correct CRCs.  If any of these checks
              fail, cw2dmk will try reading the track again, up to the  number
              of additional times specified by this option.  The default value
              is 4.  If you have an old disk with CRC errors,  increasing  the
              number  of  retries to a large value may still allow the disk to
              be read.  If you have a copy-protected disk with intentional CRC
              errors,  or other strange formatting that cw2dmk interprets as a
              possible error, you  might  want  to  reduce  or  eliminate  the
              retries to speed up the conversion.

       -a alternate
              This option is used only when when reading a 40-track disk in an
              80-track drive (-m2).  If -a is set to 0  (the  default)  cw2dmk
              reads  from  the even-numbered head positions, skipping the odd-
              numbered ones.  That is, disk track n is read from head position
              2n.   Occasionally,  more  data may be recoverable by reading at
              the next higher head position.  If you set -a to 1, cw2dmk  will
              always  read  at  odd positions (2n+1).  If -a is 2 or 3, cw2dmk
              will alternate between even and odd positions when  retries  are
              needed  to read a track, trying even positions first if -a is 2;
              odd if -a is 3.

       -o postcomp
              If you have a disk that shows a lot of CRC errors, you  can  try
              re-reading  it  with  different  values for this parameter.  The
              default is currently 0.5.  Try larger  values  if  errors  occur
              mostly  on  high-numbered tracks, smaller values if errors occur
              on lower-numbered tracks or all tracks.  Values must be  between
              0.0 and 1.0.

              Exactly what does this option do?  The magnetic flux transitions
              on a floppy disk tend to move slightly farther apart if they are
              recorded  very close together, thus lengthening the short inter-
              vals and shortening the long ones, a phenomenon sometimes called
              bit-shifting.   When  a  disk  is  recorded, the disk controller
              ordinarily applies write-precompensation to reduce this  effect;
              that  is,  it makes the short intervals extra short and the long
              ones correspondingly longer, especially on  the  inner,  higher-
              numbered  tracks.   Sometimes a disk is recorded with too little
              write precompensation, or perhaps the bits shift  even  more  as
              the  disk  ages.   With  the  postcomp option enabled, if cw2dmk
              observes that an interval is longer or shorter than its  nominal
              length,  it  will  assume  that the interval's ending transition
              moved slightly, and will lengthen or shorten the  next  interval
              as  a  sort  of  read-postcompensation.   The  deviation of each
              interval is multipled by the value of the postcomp option before
              being added to the next interval.

       -h hole
              If hole is 1 (the default), cw2dmk uses the disk's index hole to
              determine where each track starts.  If hole is set to 0,  cw2dmk
              reads  disks without using the index hole.  With -h0, the tracks
              in the DMK file will not start with the same sector  as  on  the
              original  disk  (but  the  -i option can sometimes fix this; see
              below).  Note that if the  disk  actually  has  no  index  hole,
              cw2dmk  cannot autodetect the drive/media type, so you must also
              give the -k option to specify the type.

              One case where the -h0 option is useful is if the last sector on
              a  track  wraps  around far past the index hole and is partially
              cut off by cw2dmk's normal reading method.

              The -h0 option can also be useful  with  one  type  of  "flippy"
              disk.   Generally,  a  flippy disk is a disk that has a separate
              single sided format written on each side, where  the  format  on
              the  back was written by flipping the disk over and inserting it
              into the drive upside-down.  You can't read the back of a flippy
              disk using the side 1 head of a double-sided drive; cw2dmk could
              compensate for the disk rotating the wrong way, but a more seri-
              ous  problem  is that the side 1 head on a double-sided drive is
              offset inward a few tracks from the side 0 head,  so  it  cannot
              reach the first few tracks on the back of a flippy.  This is not
              a problem if your disk was written on flippy media, which has an
              index  hole on each side of the jacket and a write protect notch
              on each edge; such media can be flipped over  and  read  in  any
              drive.   But  some flippy disks consist of non-flippy media that
              was written in a flippy drive; that is, the disk  has  only  one
              index  hole and write protect notch in the jacket, but the drive
              that was used to write it had two index  hole  sensors  and  two
              write  protect sensors, one for each side.  If you have the lat-
              ter kind of flippy disk but no flippy drive,  the  disk  can  be
              difficult  to read.  You could punch an extra hole in the disk's
              jacket, thus converting it to flippy media, or you can read  the
              disk  with  cw2dmk  using  the  -h0 option.  However, there is a
              catch with trying to use the -h0 option: although cw2dmk  itself
              does  not  need  to  see an index hole in that case, most modern
              floppy drives will not let you read any data from a disk  unless
              the  drive  itself  has seen some index holes going by since you
              inserted it.  Older drives may work,  or  you  may  be  able  to
              rejumper  or  modify  a  newer drive.  On a Mitsubishi MF504B or
              MF504C drive, remove the RD jumper.  For drives that don't  have
              such  a jumper, see http://siliconsonic.de/t/flipside.html for a
              modification idea.

       -g igno
              Causes cw2dmk to ignore the first igno  bytes  decoded  on  each
              track.  If igno is negative, an extra -igno bytes of padding are
              inserted at the beginning of each track.

       -i ipos
              If this option is given, cw2dmk forces the first IAM (index  ad-
              dress mark) encountered to be exactly ipos bytes from the physi-
              cal start of the track, by ignoring bytes or adding  padding  at
              the start of the track as with the -g option.  The default value
              is -1, which disables this feature.

              This feature can be useful in conjuction with  the  -h0  option.
              If  your  disk was originally formatted with an IAM at the start
              of each track, cw2dmk can start the tracks at the same point  in
              the  DMK  file,  even  though the -h0 option keeps it from being
              able to use the physical index hole to find the start.  For this
              purpose,  -i96  is a good value to make sure that gap0 (the pre-
              IAM gap) is large enough to meet the IBM  format  spec.   Use  a
              smaller  value  if -i96 causes the last sector of some tracks to
              be partially cut off.

              This feature can also be useful to reproduce  certain  copy-pro-
              tected disks exactly.  Some copy-protection schemes work only if
              the data is precisely positioned on the physical track.  If  you
              have  this  problem,  you  may need to experiment with different
              values for the -i or -g options.

       -z maxsize
              Change the maximum value expected for IBM-compatible sector size
              codes.  This option does not affect the actual data that is read
              from the disk and written to the DMK file; it affects  only  the
              CRC  checking  and  error retry algorithm described under the -x
              option above.  The default value is correct for disks that  were
              written  by  Western  Digital  WD177x/179x  controllers  used in
              TRS-80s.  On most of these controllers, only the  two  low-order
              bits  of  the  code are ever significant, and the sector size is
              given by 128 << (code & 3).  On the 1771, there is also  an  op-
              tional  "non-IBM"  feature that can be selected when a sector is
              read or written.  When this feature is used, the sector size  is
              given  by 16 * code (or 16 * 256 if code is zero).  As a heuris-
              tic, cw2dmk assumes the non-IBM feature was used if a sector  is
              recorded  in  FM (single density) and its size code is more than
              maxsize.  In contrast, with NEC765-compatible floppy  disk  con-
              trollers  as  used  in  PCs,  the sector size is given by 128 <<
              (code & 7).  Thus if you have a disk written by a PC  with  sec-
              tors  larger  than  1024  bytes, setting maxsize to 7 will allow
              cw2dmk to correctly determine the sector sizes and avoid report-
              ing false CRC errors.

       -r reverse
              If reverse is 1, cw2dmk reverses the sides of the disk; that is,
              it reads side 0 of the DMK file from physical side 1 of the disk
              and side 1 of the DMK (if any) from physical side 0 of the disk.
              The default is 0, which does not reverse the sides.  This option
              is most likely to be useful if you have a disk that was recorded
              in a double-sided drive with a separate single-sided  filesystem
              on  each side.  Reading such a disk twice, once with -s1 -r0 and
              once with -s1 -r1, gives you a separate  1-sided  DMK  image  of
              each  side  of  the  disk.  (Note: this option is not useful for
              reading the back of a flippy disk; see the -h0 option.)

       The next few options modify individual parameters that are normally set
       correctly  by  the  -k option (or by autodetection of the correct value
       for the -k option).  These options can be given only after the  -k  op-
       tion.  To see the default values for a particular disk kind N, type the
       command "cw2dmk -kN" with no other arguments; they  will  be  shown  in
       brackets in the usage message.

       -c clock
              Catweasel  sample  rate  multiplier.  1 selects 7.080 MHz, 2 se-
              lects 14.161 MHz, and (on Catweasel MK3 and MK4 only) 4  selects
              28.322 MHz.

       -1 threshold
              MFM threshold for short (10) vs. medium (100), in number of sam-
              ples.

       -2 threshold
              MFM threshold for medium (100) vs. long  (1000),  in  number  of
              samples.

       -f threshold
              FM  threshold for short (1) vs. long (10), in number of samples.
              Used only in -e1 mode; in the default mode where encoding is au-
              todetected on the fly, FM samples must lie outside the range be-
              tween the two MFM thresholds to be decoded correctly.

       -l bytes
              DMK track length in bytes.  The maximum is 0x4000 hex  or  16384
              decimal.   Note  that  cw2dmk  uses  this  value  as part of its
              heuristic to determine when it has read one complete  track  and
              is  starting  to  see wraparound back to the start of the track.
              If the DMK track buffer is more than 95% full and a sector  with
              the  same header as the first sector on the track is seen again,
              cw2dmk assumes it has wrapped around to the start of  the  track
              again and stops reading.  This heuristic will be defeated if you
              set the track length to a huge value, so set it at  most  a  few
              percent  higher  than  the default for the disk kind (-k option)
              you are using.

Limitations
       Here are some cases where the results may not be correct unless an  ad-
       ditional command line option is given.

       If the disk has a defect but can be successfully read by using a larger
       number of retries than normal, use the -x option.

       If the disk is noisy, cw2dmk's decoder may sometimes misclassify a sam-
       ple  or even misdetect the encoding (FM, MFM, or RX02), usually result-
       ing in a CRC error or a missing sector.  You can sometimes work  around
       this (especially for FM-only disks) by using the -e option to force on-
       ly one encoding to be considered.  Another workaround that can help  is
       the -o option.  In rare cases, tweaking thresholds with the -1, -2, and
       -f options may help.  The histogram displayed by the -v7 option or  the
       separate testhist program may help you find the best thresholds.

       If the disk was formatted with more than 43 tracks in a 40-track drive,
       or more than 86 tracks in an 80-track drive, use the -t option.

       Double-stepping is used to read 35- or 40-track disks  in  an  80-track
       drive.   If  a  copy-protected  disk has nonstandard track numbers that
       fool cw2dmk when it tries to detect whether the drive needs to be  sin-
       gle or double-stepped, use the -s option.

       If  the  TRS-80 program on a copy-protected disk does a Read Track when
       it is run, and it expects the raw track data to be  precisely  aligned,
       but  the  data  comes  out shifted a few bytes forward or backward when
       read with the Catweasel, use the -g or -i option.

       If the last sector on a track wraps around through the index  hole  and
       extends  too  far past it, cw2dmk's normal -h1 reading strategy may cut
       off the end of it, resulting in a CRC error.  Using the -h0 option  may
       take care of the problem.

       If  the disk was made by a NEC765-compatible controller and has sectors
       longer than 1024 bytes, use the -z7 option.

       If a disk has fewer tracks than cw2dmk guesses, reading will  sometimes
       continue past the last valid track.  It is harmless for extra tracks of
       garbage to be written to the end of the DMK file, but if you  know  the
       correct  number of tracks, you can use the -t option to force cw2dmk to
       stop at the right place.  Remember that track numbers start from  zero,
       so (for example) giving the option -t35 will cause tracks numbered 0 to
       34 to be read.

       Atari 800 floppy disk drives typically rotate at 288 RPM instead of 300
       RPM,  allowing  for  somewhat more data per track than standard drives,
       and they write data to the disk without regard for the position of  the
       index hole.  To read one of these disks with cw2dmk in a standard flop-
       py drive, give the -h0 option to ignore the index  hole  position,  the
       -k1  or  -k2 option as needed to specify the kind of drive and media in
       use, and the -l 0x1A40 option to increase the DMK track length.

Diagnostics
       cw2dmk: Must be setuid to root or be run as root
       cw2dmk: No access to I/O ports
              On Linux, cw2dmk must be made setuid to root or be run as  root,
              or  it  will not be able to access the Catweasel's I/O ports and
              this error message will appear.

       cw2dmk: Failed to detect Catweasel
              A Catweasel card was not detected at the specified I/O ports.

       cw2dmk: Failed to detect any drives
              You did not specify a drive to use with the  -d  opion,  and  no
              drives  were detected.  The track 0 sensor is used to detect the
              presence of a drive, so you may get this message if  your  drive
              has a broken track 0 sensor.  In that case, use the -d option to
              select which drive to use.

       cw2dmk: Drive d not detected; proceeding anyway
              You specified a drive for cw2dmk to use with the -d option,  but
              it  was  not detected.  The track 0 sensor is used to detect the
              presence of a drive, so you may get this  message  for  a  drive
              with a broken track 0.  However, it's more likely that the spec-
              ified drive number does not exist.  Cabling and drive  selection
              can  be confusing, so before giving up, try the other drive num-
              ber or leave out the -d option and  let  cw2dmk  autodetect  the
              drive  number.   Note: In versions prior to 3.0, cw2dmk used the
              opposite drive numbering convention from the  bundled  Catweasel
              software  supplied  by  Individual Computers.  This has now been
              corrected.

       cw2dmk: Track 0 side 0 is unformatted
              For drive/media autodetection to work, track 0 of  the  diskette
              must be formatted.  This message is printed if the track appears
              not to be formatted.

       cw2dmk: Failed to detect drive and media type
              This message is printed if drive/media autodetection  fails  for
              some  unknown reason.  The detector's estimate of the data clock
              rate and disk rotation speed are also printed; if they are wild-
              ly wrong, the disk may be unformatted.

       cw2dmk: Read error
       cw2dmk: No index hole detected
       cw2dmk: No index hole; can't detect drive and media type
       cw2dmk: No index hole; can't detect if side 1 is formatted
              Either  the  drive  reported  that  it  was  not  ready when the
              Catweasel tried to read from it, or no index hole was  detected.
              These  messages usually mean that there is no disk in the drive.
              They might also appear in some cases if the drive  is  not  con-
              nected  properly,  the  door is not closed, the disk is inserted
              upside-down, etc.

              If the disk really does not have an index hole -- in particular,
              if  you  are  reading  the  back of a disk that was written in a
              flippy drive by inserting it upside-down  into  a  normal  drive
              (see  the  -h0 option) -- cw2dmk cannot autodetect the drive and
              media type or if side 1 is formatted, so you will have  to  give
              the  -k  and  -s flags to tell it the correct type and number of
              sides.

       Possibly a flippy disk; check reverse side too
              This message is not an error.  It means that you are  reading  a
              disk  in a double-sided drive and cw2dmk detected there might be
              "flippy" data on the back of the disk in addition to the  normal
              data  on  the front.  cw2dmk cannot read all of this data unless
              you flip the disk over (see the -h0 option for details), but  it
              can  usually  read  enough  to  detect  that  there is some data
              present and print this message.

       cw2dmk: Catweasel memory error?! See cw2dmk.txt
              If you receive this message on an unformatted track, please  ig-
              nore it; nothing is wrong.

              If  you receive the message on a formatted track, and you have a
              Catweasel MK1 card that was manufactured before July 2000,  con-
              tact Individual Computers for information on obtaining an updat-
              ed version of the MACH chip in your Catweasel.  If you never see
              this message, the update is not needed.

              Alternatively, you may be able to work around the problem by us-
              ing the Catweasel's lower clock rate  (-c1)  with  appropriately
              reduced  values  for the threshold parameters (-1 and -2 or -f).
              The thresholds for -c1 should be about half the  default  values
              used  with  -c2.   To  see the default threshold values for disk
              kind number N, type the command "cw2dmk -kN" with no other argu-
              ments; they will be shown in brackets in the usage message.

Authors
       cw2dmk was written by Timothy Mann, http://tim-mann.org/.  It uses low-
       level Catweasel access routines written by Michael Krause.   cw2dmk  is
       free  software,  released under the GNU General Public License.  Thanks
       to Jens Schoenfeld  for  providing  documentation  on  programming  the
       Catweasel hardware.  Thanks to David Keil for designing and documenting
       the DMK file format for floppy disk images.

       The DPMI host cwsdpmi.exe is free software, written and copyrighted  by
       Charles  W. Sandmann and released under the GNU General Public license.
       You can download the source code and/or binary updates for this program
       from  ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2misc/.   Look  for
       files with names of the form csdpmi*.zip.  Note:  the  highest  version
       that has been tested with cw2dmk at this writing is 5.

       $Id: cw2dmk.man,v 1.31 2010/01/15 23:11:54 mann Exp $

                                                                     cw2dmk(1)
