Thomas Harte
2a08bd9ecc
Factors shifting plus stateful [M]FM token recognition out of the MFMDiskController.
...
Given the proliferation of MFM-related classes, establishes a subdirectory for them.
2017-09-24 20:07:56 -04:00
Thomas Harte
698e4fe550
Tidies the Disk file hierarchy.
2017-09-22 22:39:23 -04:00
Thomas Harte
b5406b90cd
Introduces a new class hierarchy for disk images.
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Increasing independence of format-specific stuff and generic caching without mangling them into a common namespace, and allowing in some cases for a decrease in read/write blocking.
2017-09-22 20:28:11 -04:00
Thomas Harte
44a56724cb
Speeds up byte decoding within sectors for the ahead-of-time MFM parser.
2017-09-16 20:28:24 -04:00
Thomas Harte
da082673d7
Drives now have a finite number of heads.
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The Amstrad volunteers itself to be single sided. Everything else stays as it was.
2017-09-15 21:18:36 -04:00
Thomas Harte
96bf133924
Withdraws requirement for DiskController users to specify a PLL multiplier or to provide rotation speed.
...
In the latter case because it's no longer of any interest to the controller, and in the former because I'd rather it be picked automatically.
2017-09-10 22:56:05 -04:00
Thomas Harte
8882aa496f
Corrected wiring to get advance signals through to Drive event delegates.
2017-09-10 20:51:05 -04:00
Thomas Harte
0622187ddf
Strips Controller of all capabilities now housed on the Drive.
2017-09-10 19:23:23 -04:00
Thomas Harte
523e1288fa
Updates the MFM parser to use SingleTrackDisk rather than the equivalent withdrawn Drive functionality.
2017-09-10 17:34:52 -04:00
Thomas Harte
90c7056d12
Started devolving timed event loop logic down to the drives, moving them closer to modelling real life.
2017-09-10 14:43:20 -04:00
Thomas Harte
c6e6c3fcfb
Resolves all current analyser warnings.
2017-08-24 22:18:44 -04:00
Thomas Harte
ef07c33741
Merge branch 'Plus10' into MFMParserDensity
2017-08-18 15:48:20 -04:00
Thomas Harte
e559a65ede
Ideally I would be able to kill this multiplier, as it could easily be derived at runtime. But, for now, just turned it up so that the analysis-oriented parser is better at parsing different bit rates.
2017-08-18 15:47:46 -04:00
Thomas Harte
0c1714b695
Relaxed a little to allow +10% in track length.
2017-08-17 21:36:14 -04:00
Thomas Harte
4f8b89772e
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.
2017-08-17 15:31:53 -04:00
Thomas Harte
fedf5a44a6
Imposes a maximum track length.
2017-08-17 15:20:49 -04:00
Thomas Harte
1011143dbe
Sought to correct my interpretation of 'gap 3'.
2017-08-13 21:52:48 -04:00
Thomas Harte
0c8769e335
Just to be safe.
2017-08-11 18:41:08 -04:00
Thomas Harte
83c7d34df2
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.
2017-08-11 18:40:16 -04:00
Thomas Harte
a12671010a
Sector size is now reported, and CRC failures are merely indicated, not cause for a sector to be thrown away.
2017-08-11 16:23:33 -04:00
Thomas Harte
cf1403bc79
Increased documentation.
2017-08-11 14:27:07 -04:00
Thomas Harte
fcf63a7547
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.
2017-08-11 14:24:50 -04:00
Thomas Harte
734099a956
Threw a sector cache into my MFM parser, in an attempt to cut down analysis costs. Also made it aware of multiple heads.
2017-08-11 10:29:13 -04:00
Thomas Harte
8a2bdb8d22
Converted the TimedEventLoop and the things that sit atop it into ClockReceivers.
2017-07-24 21:19:05 -04:00
Thomas Harte
1d01acce06
Fixed differing types of loop variables and targets.
2017-07-21 21:53:05 -04:00
Thomas Harte
e01f3f06c8
Completed curly bracket movement.
2017-03-26 14:34:47 -04:00
Thomas Harte
f94f34f053
Made an attempt at read track. Which means process_input_bit can't just swallow syncs any more; it now reports them as tokens of type ::Sync.
2017-01-01 20:39:19 -05:00
Thomas Harte
8eb21c6702
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.
2016-12-31 15:25:11 -05:00
Thomas Harte
cfbab1448c
Switched to a track parsing that disallows synchronisation values within sector contents.
2016-12-31 12:23:08 -05:00
Thomas Harte
6f0b5427e4
Made an attempt to avoid repetition of sync bytes.
2016-12-31 00:20:00 -05:00
Thomas Harte
0123b37213
Made an attempt to include sync values in the stream and properly to align.
2016-12-31 00:11:31 -05:00
Thomas Harte
1f625fad66
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.
2016-12-30 23:10:52 -05:00
Thomas Harte
d581294479
Added get_track to get the PLL output for a complete track.
2016-12-30 19:59:23 -05:00
Thomas Harte
c740d9655a
Fixed: index_count_ may have been left high by a previous call; reset it just in case.
2016-12-30 17:55:06 -05:00
Thomas Harte
d09e7ac1e8
Made an attempt at reacting appropriately if the very first thing that looks like a sector doesn't pan out.
2016-12-30 17:44:35 -05:00
Thomas Harte
82bb78fb2d
Ensured that get_sector copes even if any invalid sectors are encountered.
2016-12-30 14:21:14 -05:00
Thomas Harte
9cb902cc4f
Experimentally marked ADF as writable too, immediately discovering a mistake in the analysing MFM decoder.
2016-12-28 22:34:22 -05:00
Thomas Harte
46a93d2e12
Fixed errors to ensure that FM disks, at least, follow the same CRC generation rules when being built from sectors and when being parsed.
2016-12-28 19:48:46 -05:00
Thomas Harte
720b1e5802
Attempted to ensure proper CRC generation for FM-format input.
2016-12-28 18:56:53 -05:00
Thomas Harte
3a9ad3fb08
Fixed Oric .DSK handling, per my latest understanding. Which creates a desire to write shorts directly to the disk surface, so exposed that in the encoder.
2016-12-28 18:50:28 -05:00
Thomas Harte
a568172758
Made steps towards proper CRC generation. Am currently comparing against Oric disk images, as — amongst other things — they include precomputed CRCs.
2016-12-28 18:29:37 -05:00
Thomas Harte
0490a47058
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.
2016-12-26 14:24:33 -05:00
Thomas Harte
beaa868079
Factored the MFM parser out into encodings.
2016-12-25 20:00:57 -05:00
Thomas Harte
dcfdd73077
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.
2016-11-26 13:39:20 +08:00
Thomas Harte
de863719d0
Made a first attempt at Acorn ADFS support plus the start of a suitable analyser.
2016-09-25 17:46:11 -04:00
Thomas Harte
a9e65e9b7a
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.
2016-09-19 22:06:56 -04:00
Thomas Harte
64f2538b1f
Added CRC checking to DFS comprehension; fixed a bunch of places where I'd used Objective-C's #import rather than #include.
2016-09-19 08:16:06 -04:00
Thomas Harte
b1e7f2dfd0
There's no cache and no CRC checking yet, but this is probably a rough outline of an FM parser.
2016-09-18 22:03:06 -04:00
Thomas Harte
91cd7e143b
Started on the SSD/DSD support. Realised I had ommitted multiple head support from my disk class. Fixed that.
2016-09-18 19:21:02 -04:00
Thomas Harte
5409c8ec54
Switched PCMSegments to std::vector; ensured generated [M]FM tracks are correctly sized, thereby making sure the individual flux windows will be correctly sized.
2016-09-18 18:56:35 -04:00
