Thomas Harte
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0c1714b695
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Relaxed a little to allow +10% in track length.
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2017-08-17 21:36:14 -04:00 |
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Thomas Harte
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4f8b89772e
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Improved logic for detecting when all sense has been derived from a track to spot any repeated track, not necessarily the first one. That avoids sectors that run over the index hold and obscure the first throwing things.
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2017-08-17 15:31:53 -04:00 |
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Thomas Harte
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fedf5a44a6
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Imposes a maximum track length.
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2017-08-17 15:20:49 -04:00 |
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Thomas Harte
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1011143dbe
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Sought to correct my interpretation of 'gap 3'.
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2017-08-13 21:52:48 -04:00 |
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Thomas Harte
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0c8769e335
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Just to be safe.
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2017-08-11 18:41:08 -04:00 |
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Thomas Harte
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83c7d34df2
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Switched to populating the sector cache with everything in a track the first time anything on that track is requested. That avoids the problem whereby each request of a non-existent sector costs two spins.
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2017-08-11 18:40:16 -04:00 |
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Thomas Harte
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a12671010a
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Sector size is now reported, and CRC failures are merely indicated, not cause for a sector to be thrown away.
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2017-08-11 16:23:33 -04:00 |
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Thomas Harte
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fcf63a7547
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Expands the [M]FM encoder to respect some new Sector flags: it will now wilfully make CRC errors, omit data, include data that is different than the ID's declared length, write deleted data, and can be commanded as to header/data gaps and what should be within them. All based around expanding towards the needs for reproduction of the CPC's .DSK file format.
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2017-08-11 14:24:50 -04:00 |
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Thomas Harte
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734099a956
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Threw a sector cache into my MFM parser, in an attempt to cut down analysis costs. Also made it aware of multiple heads.
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2017-08-11 10:29:13 -04:00 |
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Thomas Harte
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8a2bdb8d22
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Converted the TimedEventLoop and the things that sit atop it into ClockReceivers.
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2017-07-24 21:19:05 -04:00 |
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Thomas Harte
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1d01acce06
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Fixed differing types of loop variables and targets.
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2017-07-21 21:53:05 -04:00 |
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Thomas Harte
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e01f3f06c8
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Completed curly bracket movement.
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2017-03-26 14:34:47 -04:00 |
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Thomas Harte
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8eb21c6702
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The "MFM...Byte"s aren't MFM-specific, they're relevant to both FM and MFM encoding. So renamed them. Also slimmed syntax within MFM.cpp mostly where emigration from the Acorn disk analyser had left a residue of lengthy namespace specification.
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2016-12-31 15:25:11 -05:00 |
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Thomas Harte
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cfbab1448c
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Switched to a track parsing that disallows synchronisation values within sector contents.
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2016-12-31 12:23:08 -05:00 |
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Thomas Harte
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6f0b5427e4
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Made an attempt to avoid repetition of sync bytes.
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2016-12-31 00:20:00 -05:00 |
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Thomas Harte
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0123b37213
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Made an attempt to include sync values in the stream and properly to align.
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2016-12-31 00:11:31 -05:00 |
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Thomas Harte
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1f625fad66
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Decided that if this is an [M]FM parsing function then it should be something more intelligent than a mere PLL record. Which I guess conveniently implies Oric DSK-esque behaviour. But properly defined, rather than very vaguely.
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2016-12-30 23:10:52 -05:00 |
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Thomas Harte
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d581294479
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Added get_track to get the PLL output for a complete track.
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2016-12-30 19:59:23 -05:00 |
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Thomas Harte
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c740d9655a
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Fixed: index_count_ may have been left high by a previous call; reset it just in case.
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2016-12-30 17:55:06 -05:00 |
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Thomas Harte
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d09e7ac1e8
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Made an attempt at reacting appropriately if the very first thing that looks like a sector doesn't pan out.
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2016-12-30 17:44:35 -05:00 |
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Thomas Harte
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82bb78fb2d
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Ensured that get_sector copes even if any invalid sectors are encountered.
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2016-12-30 14:21:14 -05:00 |
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Thomas Harte
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9cb902cc4f
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Experimentally marked ADF as writable too, immediately discovering a mistake in the analysing MFM decoder.
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2016-12-28 22:34:22 -05:00 |
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Thomas Harte
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46a93d2e12
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Fixed errors to ensure that FM disks, at least, follow the same CRC generation rules when being built from sectors and when being parsed.
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2016-12-28 19:48:46 -05:00 |
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Thomas Harte
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720b1e5802
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Attempted to ensure proper CRC generation for FM-format input.
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2016-12-28 18:56:53 -05:00 |
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Thomas Harte
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a568172758
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Made steps towards proper CRC generation. Am currently comparing against Oric disk images, as — amongst other things — they include precomputed CRCs.
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2016-12-28 18:29:37 -05:00 |
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Thomas Harte
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0490a47058
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Worked on the all-around framework for decoding sectors back from tracks when closing down a file. Hit the wall that the parser is more observant of CRCs than the WD. No, really. So I guess I have to stop avoiding that whole issue.
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2016-12-26 14:24:33 -05:00 |
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Thomas Harte
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beaa868079
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Factored the MFM parser out into encodings.
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2016-12-25 20:00:57 -05:00 |
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Thomas Harte
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dcfdd73077
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Switched to more conventional runtime polymorphism, also now allowing encoders (shifters as were) to be obtained, as a slightly lower-level interface than vector-of-sectors.
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2016-11-26 13:39:20 +08:00 |
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Thomas Harte
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de863719d0
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Made a first attempt at Acorn ADFS support plus the start of a suitable analyser.
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2016-09-25 17:46:11 -04:00 |
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Thomas Harte
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a9e65e9b7a
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Tweaked disk side density, added call-outs to a WD1770 if the Electron had one (albeit without run_for_cycles yet as I need to figure out the clock rate), added a shell of the basic functions of the WD1770. No implementation yet.
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2016-09-19 22:06:56 -04:00 |
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Thomas Harte
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64f2538b1f
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Added CRC checking to DFS comprehension; fixed a bunch of places where I'd used Objective-C's #import rather than #include.
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2016-09-19 08:16:06 -04:00 |
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Thomas Harte
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b1e7f2dfd0
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There's no cache and no CRC checking yet, but this is probably a rough outline of an FM parser.
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2016-09-18 22:03:06 -04:00 |
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Thomas Harte
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91cd7e143b
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Started on the SSD/DSD support. Realised I had ommitted multiple head support from my disk class. Fixed that.
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2016-09-18 19:21:02 -04:00 |
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Thomas Harte
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5409c8ec54
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Switched PCMSegments to std::vector; ensured generated [M]FM tracks are correctly sized, thereby making sure the individual flux windows will be correctly sized.
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2016-09-18 18:56:35 -04:00 |
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Thomas Harte
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d9aaf456f0
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Adapted pervasively to MSB-first output. Which seems to be correct.
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2016-09-18 18:46:58 -04:00 |
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Thomas Harte
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180c3df2d4
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Calling it 'number theory' probably isn't accurate but extracted the CRC stuff and started using it for [M]FM encoding.
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2016-09-18 18:33:26 -04:00 |
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Thomas Harte
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55a7418cbf
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Parameterised to perform FM and MFM encodings, at least subject to CRCs still being missing.
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2016-09-18 17:16:20 -04:00 |
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Thomas Harte
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22eed60d2b
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Started sketching out basic MFM track encoding. Which possibly even means that the shifters don't need to be public?
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2016-09-18 16:53:21 -04:00 |
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Thomas Harte
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0089c830c6
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This possibly correctly encapsultes the lowest level of FM and MFM rules.
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2016-09-18 14:17:06 -04:00 |
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Thomas Harte
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bcf91de7e9
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Declared support for the Acorn disk files, started hammering out an encoder.
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2016-09-18 13:35:54 -04:00 |
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