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Commit Graph

66 Commits

Author SHA1 Message Date
Thomas Harte
d1ce764201 Provides SectorsFromSegment, a bitstream to sector converter. 2017-09-24 22:41:16 -04:00
Thomas Harte
8875982e1f Ensures Sectors are move constructible (and still default constructible), and adds proper const qualifiers to Sector::Address. 2017-09-24 22:40:38 -04:00
Thomas Harte
3319a4f589 Isolates those Sector fields that describe its address and makes them usable as a set key. 2017-09-24 21:57:21 -04:00
Thomas Harte
c7f27b2db4 Renames MFM.[c/h]pp as per its new remit: encoding only. 2017-09-24 21:40:43 -04:00
Thomas Harte
631f630549 Severs the MFM parser from the overweight single MFM.hpp. 2017-09-24 20:31:19 -04:00
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.
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.
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523e1288fa Updates the MFM parser to use SingleTrackDisk rather than the equivalent withdrawn Drive functionality. 2017-09-10 17:34:52 -04:00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