Thomas Harte
f65c65569a
Makes disk head position explicitly something with sub-integral precision.
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Also as a drive-by fix, corrects accidental assumption of 10 sectors for all MFMSectorDump descendants.
2018-05-06 23:17:36 -04:00
Thomas Harte
2f59226300
Fixes: DiskROM drive motor control, track_for_sectors' sides.
2018-01-07 20:02:40 -05:00
Thomas Harte
793ef68206
Implements unconditional force interrupt for the WD.
2018-01-07 19:42:38 -05:00
Thomas Harte
4778616fd7
Eliminates unused result and unused label.
2017-11-12 16:30:23 -05:00
Thomas Harte
4cbc87a17d
Corrects out-of-order initialisations for the 1770, Atari 2600 joystick, Pitfall II bus extender, Microdisc and 6502.
2017-11-10 22:20:44 -05:00
Thomas Harte
ec999446e8
Commutes int and unsigned casts to the functional style.
2017-10-21 21:00:40 -04:00
Thomas Harte
5e3e91373a
Switches all unsigned int and double casts to functional style.
2017-10-21 19:49:04 -04:00
Thomas Harte
edb9fd301c
Begins this project's conversion to functional-style casts.
2017-10-03 22:04:15 -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
2a08bd9ecc
Factors shifting plus stateful [M]FM token recognition out of the MFMDiskController.
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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
4d4a0cf1d2
Puts the disk controller back into the loop with knowledge about reading mode, and uses that knowledge to cut off the PLL.
2017-09-14 22:30:40 -04:00
Thomas Harte
2f13517f38
Adjusts the 1770 not to talk directly to the drive about motor status.
2017-09-11 22:10:56 -04:00
Thomas Harte
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
Thomas Harte
0622187ddf
Strips Controller of all capabilities now housed on the Drive.
2017-09-10 19:23:23 -04:00
Thomas Harte
73080d6c36
Added an easy way for disk controllers to clamp termination of written data exactly to the index hole.
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This commit also temporarily provides a whole load of extra logging and minor logic improvements from the 8272. I'm mid-flow on finding a particularly vicious error in its handling of writing; wait for the pull request. But, at least: now waits for the first part of a post-ID gap before writing data, and attempts partially to handle appearance of the index hole during writing a track. More work to do on that though.
2017-08-15 16:05:10 -04:00
Thomas Harte
cddcd0fb79
Put my money where my mouth is and switched the superclass of WD1770 to MFMController, eliminating duplicated (/factored out) code.
2017-08-14 16:32:53 -04:00
Thomas Harte
34eaf75352
Fixed WAIT_FOR_TIME macro.
2017-08-06 12:08:54 -04:00
Thomas Harte
4abd62e62b
Standardises on const [Half]Cycles as the thing called and returned, rather than const [Half]Cycles & as it's explicitly defined to be only one int in size, so using a reference is overly weighty.
2017-07-27 22:05:29 -04:00
Thomas Harte
a1e9a54765
Eliminated redundant uses of ClockReceiver and sought to ensure that proper run_fors are inherited all the way down.
2017-07-25 20:09:13 -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
8755824c64
Added some documentation.
2017-07-22 17:25:53 -04:00
Thomas Harte
64865b3f41
Signedness fixes.
2017-07-21 21:23:34 -04:00
Thomas Harte
53f0e1896b
Made delay_time_ unsigned for safe comparison.
2017-07-21 21:21:23 -04:00
Thomas Harte
e01f3f06c8
Completed curly bracket movement.
2017-03-26 14:34:47 -04:00
Thomas Harte
eca3995481
Added a CRC check for read address, ensured CRC, lost data and record not found are initially reset.
2017-01-01 21:00:25 -05:00
Thomas Harte
044c920a5b
Made it more explicit that there are no unhandled cases.
2017-01-01 20:56:52 -05:00
Thomas Harte
0df9ce5a76
Made an attempt at read address. So superficially that leaves only the force interrupts.
2017-01-01 20:55:09 -05:00
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
c994fa39f6
Ensured spin-up doesn't occur if there's no motor line.
2016-12-31 16:18:30 -05:00
Thomas Harte
1ea4f0d79d
Made an attempt to implement 'write track' and ensure that 'write sector' can't end without announcing that it has ended writing.
2016-12-31 16:01:44 -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
a8bc9d830e
Removed leftover very temporary debugging aid.
2016-12-28 23:03:05 -05:00
Thomas Harte
e4000bd060
Added some even more verbose logging; slightly simplified write loop logic, and decided it's definitely write_byte that's responsible for CRC generator feeding.
2016-12-28 21:24:19 -05:00
Thomas Harte
4adcb46665
Fixed FM-mode CRC generation.
2016-12-28 19:51:27 -05:00
Thomas Harte
1277a67f9a
Introduced data_mode_ to replace is_reading_data_, representing that there are now three possible modes. When writing, any input from the read head won't affect the CRC generator.
2016-12-28 19:26:21 -05:00
Thomas Harte
7a627b782d
Reintroduced writing of MFM sync marks when writing a sector.
2016-12-28 18:48:50 -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
9c0f622a2e
Started working CRC checking into the 1770. Discovered immediately that my generated CRC does not match that built into the Oric disk images. So mine is pretty-much certainly wrong. An opportunity for learning!
2016-12-26 16:46:26 -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
83c433c142
Deviated from the data sheet, which seems likely to be correct. Hence removed a whole load of the temporary logging.
2016-12-26 12:48:49 -05:00
Thomas Harte
742c5df367
With lots of logging arising temporarily, fixed bug whereby conversion to a patched track would lead to holding a track with a distinct measure of time, leading to improperly-placed patches.
2016-12-25 22:00:39 -05:00
Thomas Harte
acc35885cd
Attempted to reduce track invalidations.
2016-12-25 20:38:25 -05:00
Thomas Harte
c0a1264ab0
Slightly improved legibility.
2016-12-25 20:19:47 -05:00
Thomas Harte
e2b829f68e
Made an attempt to write the proper address mark.
2016-12-25 20:15:07 -05:00
Thomas Harte
beaa868079
Factored the MFM parser out into encodings.
2016-12-25 20:00:57 -05:00
Thomas Harte
74e98fd097
Made an attempt to write actual data (albeit that CRC calculation is still missing).
2016-12-25 19:18:45 -05:00
Thomas Harte
98be6ede45
Shuffled a little to reduce risk of overflow, ensured writing is a loop, still seem to be writing too quickly for some reason.
2016-12-25 16:13:05 -05:00
Thomas Harte
d2ad2c756e
Added enough shovelling to write rubbish for an entire sector.
2016-12-25 15:46:49 -05:00
Thomas Harte
aceb7e3b6b
Started implementing write sector on the 1770, immediately deciding it would be useful to have a callback for end-of-queued-data-written from disk controller. So had a go at implementing that, naively. More investigation required.
2016-12-25 12:31:38 -05:00
