24 Commits

Author	SHA1	Message	Date
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
Thomas Harte	d9aaf456f0	Adapted pervasively to MSB-first output. Which seems to be correct.	2016-09-18 18:46:58 -04:00
Thomas Harte	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	55a7418cbf	Parameterised to perform FM and MFM encodings, at least subject to CRCs still being missing.	2016-09-18 17:16:20 -04:00
Thomas Harte	22eed60d2b	Started sketching out basic MFM track encoding. Which possibly even means that the shifters don't need to be public?	2016-09-18 16:53:21 -04:00
Thomas Harte	0089c830c6	This possibly correctly encapsultes the lowest level of FM and MFM rules.	2016-09-18 14:17:06 -04:00
Thomas Harte	bcf91de7e9	Declared support for the Acorn disk files, started hammering out an encoder.	2016-09-18 13:35:54 -04:00
Thomas Harte	9d6dcb80a7	Started work on a GCR parser and the helper functions that lie behind that.	2016-09-13 21:53:36 -04:00
Thomas Harte	f5e4ea3351	Some minor tidying, lots more of the caveman stuff as I try to determine what I'm doing wrong.	2016-08-01 09:43:08 -04:00
Thomas Harte	a00f9adba3	Made a first attempt at D64 support. Made an error somewhere but this should be 90% of it.	2016-08-01 08:41:16 -04:00
Thomas Harte	2799a87218	Reduced possibility of overflow on LCM, improved commenting widely, removed one stale piece of G64 bootstrapping caveman stuff.	2016-08-01 06:04:55 -04:00
Thomas Harte	89a1881fef	Started turning the 1540 into an actual disk drive.	2016-07-29 11:03:09 -04:00