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
44a56724cb
Speeds up byte decoding within sectors for the ahead-of-time MFM parser.
2017-09-16 20:28:24 -04:00
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
96bf133924
Withdraws requirement for DiskController users to specify a PLL multiplier or to provide rotation speed.
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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
8882aa496f
Corrected wiring to get advance signals through to Drive event delegates.
2017-09-10 20:51:05 -04:00
0622187ddf
Strips Controller of all capabilities now housed on the Drive.
2017-09-10 19:23:23 -04:00
523e1288fa
Updates the MFM parser to use SingleTrackDisk rather than the equivalent withdrawn Drive functionality.
2017-09-10 17:34:52 -04:00
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
c6e6c3fcfb
Resolves all current analyser warnings.
2017-08-24 22:18:44 -04:00
ef07c33741
Merge branch 'Plus10' into MFMParserDensity
2017-08-18 15:48:20 -04:00
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
0c1714b695
Relaxed a little to allow +10% in track length.
2017-08-17 21:36:14 -04:00
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
fedf5a44a6
Imposes a maximum track length.
2017-08-17 15:20:49 -04:00
1011143dbe
Sought to correct my interpretation of 'gap 3'.
2017-08-13 21:52:48 -04:00
0c8769e335
Just to be safe.
2017-08-11 18:41:08 -04:00
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
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
cf1403bc79
Increased documentation.
2017-08-11 14:27:07 -04:00
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
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
8a2bdb8d22
Converted the TimedEventLoop and the things that sit atop it into ClockReceivers.
2017-07-24 21:19:05 -04:00
1d01acce06
Fixed differing types of loop variables and targets.
2017-07-21 21:53:05 -04:00
e01f3f06c8
Completed curly bracket movement.
2017-03-26 14:34:47 -04:00
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
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
cfbab1448c
Switched to a track parsing that disallows synchronisation values within sector contents.
2016-12-31 12:23:08 -05:00
6f0b5427e4
Made an attempt to avoid repetition of sync bytes.
2016-12-31 00:20:00 -05:00
0123b37213
Made an attempt to include sync values in the stream and properly to align.
2016-12-31 00:11:31 -05:00
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
d581294479
Added get_track to get the PLL output for a complete track.
2016-12-30 19:59:23 -05:00
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
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
82bb78fb2d
Ensured that get_sector copes even if any invalid sectors are encountered.
2016-12-30 14:21:14 -05:00
9cb902cc4f
Experimentally marked ADF as writable too, immediately discovering a mistake in the analysing MFM decoder.
2016-12-28 22:34:22 -05:00
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
720b1e5802
Attempted to ensure proper CRC generation for FM-format input.
2016-12-28 18:56:53 -05:00
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
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
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
beaa868079
Factored the MFM parser out into encodings.
2016-12-25 20:00:57 -05:00
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
de863719d0
Made a first attempt at Acorn ADFS support plus the start of a suitable analyser.
2016-09-25 17:46:11 -04:00
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
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
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
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
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
d9aaf456f0
Adapted pervasively to MSB-first output. Which seems to be correct.
2016-09-18 18:46:58 -04:00
180c3df2d4
Calling it 'number theory' probably isn't accurate but extracted the CRC stuff and started using it for [M]FM encoding.
2016-09-18 18:33:26 -04:00
Thomas Harte