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72 Commits

Author SHA1 Message Date
David Given
fc2655ecd6 Rework the bytecode format to use a much simplified setup: a six-bit timer with 
the top two bits reserved for pulse and index state. This is actually smaller,
bandwidth-wise, than the old version, and may be smaller than the crunched
version.
 2020-03-14 18:58:43 +00:00
David Given
323da8272a Hopefully add support for giving the reader a set of required sectors, so if 
one is missing then we can tell and the track can be reread.
 2020-02-21 22:14:44 +01:00
David Given
d25f96dd24 The IBM encoder now works well enough that my USB floppy drive thinks the disk 
is formatted... but has trouble reading sectors above about 1000. Also remember
that encoding MFM needs to keep one bit of state at all times.
 2020-02-14 00:06:51 +01:00
David Given
a8eca06cf0 Don't hang if we hit the end of stream while waiting for a data record. 2020-01-27 23:09:29 +01:00
David Given
91ffcf59c3 When reading data records, retry if we get an UNKNOWN record to work the 
occasional false positive (which happens now and again with MFM).
 2020-01-27 01:15:14 +01:00
David Given
9dc1067032 Add --dump-sectors. Sector positions are recorded correctly. 2020-01-26 18:30:35 +01:00
David Given
6af80d1e5e Improve some messaging. A data record is always pushed, even if it's empty (to 
help debugging).
 2020-01-26 17:49:12 +01:00
David Given
0c48897814 Add a minimum clock threshold. 2020-01-26 17:48:33 +01:00
David Given
4475e9f085 Increase the default bit-error-threshold to 0.4, because that's the value I 
almost always end up using.
 2019-12-14 21:33:39 +01:00
David Given
792cc88192 The Amiga writer now generates valid flux files --- but it looks like the 
writer's broken (both the Amiga and the Brother have failed).
 2019-12-14 20:44:48 +01:00
David Given
b9a53e0d1c First draft of the visualiser. 2019-08-27 01:07:57 +02:00
David Given
d0a864c052 Merge. 2019-07-03 23:20:07 +02:00
David Given
032df676c1 Replace meson with a very small shell script. 2019-07-03 22:18:34 +02:00
David Given
a1c207cb8f First milestone towards flags rewrite --- it builds and the tests pass, but 
nothing actually works.
 2019-07-02 23:06:40 +02:00
David Given
3ee31b96a4 Add the prototype MX decoder. 2019-07-02 00:40:38 +02:00
David Given
196f2bfd7e Cygwin doesn't have ffsll. 2019-04-30 22:56:15 +02:00
David Given
0f56cd25e9 Warning fix. 2019-04-30 22:27:07 +02:00
David Given
27fb17b9b5 Move the clock guesser stuff into fe-inspect. 2019-04-30 21:55:44 +02:00
David Given
b1092c7f82 Simplify the decoder class hierarchy. 2019-04-30 21:44:56 +02:00
David Given
1fb67dfe3c Remove stateful decoder and split decoder. 2019-04-30 21:43:25 +02:00
David Given
9971dbd2c7 Update Mac to the new new architecture. 2019-04-30 21:34:33 +02:00
David Given
184e7766f0 Add some helper methods to make decoders easier. Port IBM to the new new 
architecture.
 2019-04-30 20:45:16 +02:00
David Given
4cc680057e Port the Brother decoder to the new *new* architecture. 2019-04-29 23:28:12 +02:00
David Given
c0c1121b91 Add debounce support (only for reading bits, not in pattern matching). 2019-04-29 23:27:58 +02:00
David Given
bd448e081f Remove the obsolete Fluxmap::decodeToBits(). 2019-04-28 20:57:55 +02:00
David Given
00bae9fba7 Remove the obsolete decoder base classes. 2019-04-28 00:32:32 +02:00
David Given
4e3d4e31af The flux pattern matcher will now preserve leading zeroes (although it can't 
match them). The IBM decoder is now properly converted, autodetecting FM and
MFM.
 2019-04-27 22:11:39 +02:00
David Given
bec46419d6 Remove the obsolete FluxPatterns. 2019-04-27 10:27:55 +02:00
David Given
a483ad987e Archival checking: IBM FM works (but not MFM yet). Other formats have stopped 
working.
 2019-04-26 23:52:04 +02:00
David Given
643288bef8 Extend the flux pattern matcher to support trailing zeroes. 2019-04-25 23:18:47 +02:00
David Given
3a531c0889 The Zilog MCZ decoder is ported to the new architecture. 2019-04-19 15:10:24 +02:00
David Given
2ddc1045ec Rework the Victor 9000 decoder to use the new architecture. 2019-04-19 14:39:26 +02:00
David Given
5f8e0c846c Allow split decoders (into sector record and data record). 2019-04-19 00:55:01 +02:00
David Given
b158692a3a Radically simplify RawRecord and Sector. It all works, and the results are 
better, but I've disabled a bunch of decoders for now.
 2019-04-18 21:47:34 +02:00
David Given
4b480ce4f3 Rewrite the Macintosh decoder. 2019-04-18 01:31:52 +02:00
David Given
5ce2acdfb4 The new decoder architecture now works, at least for the FB100. All I need now 
is to rewrite every single other decoder.
 2019-04-18 00:47:28 +02:00
David Given
6e31a9e4ae Refactor so track state is passed around in the Track object. 2019-04-16 22:49:35 +02:00
David Given
7a49ec7819 Moderately crudely hack in routing side information to the decoders; this is 
needed by the Victor 9000 decoder to figure out the right clock rate.
 2019-04-16 19:50:25 +02:00
David Given
9b59e7025d Add the ability for decoders to specify their own clocks --- necessary for the 
Victor 9k. We now have _much_ better decoding for this platform.
 2019-04-16 01:13:28 +02:00
David Given
84076674fd Add stateful decoders, which makes formats like the FB-100 much easier to work 
with. Add a generic CRC tool allowing all the parameters to be set (currently
unused).
 2019-04-12 00:13:56 +02:00
David Given
490821da09 Hard sector segmentation can now cope with the extra index hole. We are 
correctly decoding the Zilog MCZ disk.
 2019-03-09 12:32:42 +01:00
David Given
cf9730fbb3 Splitting by hard sectors works, up to a point; we can correctly decode (with 
CRC checking!) most of the Zilog MCS disk. However, we're still stumped by the
extra index hole.
 2019-03-09 12:19:28 +01:00
David Given
456791e20c Refactor to use FluxmapReader. 2019-03-09 11:30:50 +01:00
David Given
574d383573 Remove discrete segmenters, instead rolling the logic into Decoders; prepare 
for splitting decoders into soft-sector and hard-sector.
 2019-03-08 23:57:46 +01:00
David Given
d59e7f0fc4 Skeleton Zilog Mcz support. 2019-03-06 00:00:06 +01:00
David Given
94fb10eb02 Behemoth change to rework everything to use Bytes rather than vectors of 
uint8_t. The tests pass, but of course, nothing decodes any more.
 2019-03-05 00:10:20 +01:00
David Given
6d530c332e Tweak signal floor: the Brother disk doesn't read any more. 2019-03-03 22:12:13 +01:00
David Given
4eaca91a44 Add a skeleton for the AES Lanier disks. 2019-03-02 22:40:59 +01:00
David Given
06af553760 Make the noise floor and signal level configurable for clock detection. 2019-03-02 11:56:17 +01:00
David Given
e16a9f77f3 Skip long runs of noise in the clock histogram. 2019-03-01 17:15:39 +01:00