Thomas Harte
6fc692cd34
Attempted to switch to an asynchronous means for continuous file updates. Testing with SSD, as usual.
2016-12-29 22:15:58 -05:00
Thomas Harte
b9fad184d7
Added just enough for a complete manual test of writing to a .ADF with the 1770 then getting the correct result parsing it back on the host side in order potentially to update a file.
...
... which means that now it's time to worry about when and how mounted files should actually update themselves. Which will make for some fun with threading, I dare say.
2016-12-28 23:00:47 -05:00
Thomas Harte
af1b396c9e
Found an ugly issue with Storage::Time as implemented (i) to be unsigned; and (ii) automatically to simplify. Will need to fix. Here's a quick workaround for this one segment of code.
2016-12-28 22:57:11 -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
bfe6c0a0c1
Ensured that FileHolder gets a writeable file reference if one is possible, and records whether the file in hand is read-only. So now the SSD class can answer honestly.
2016-12-28 20:09:14 -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
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
b538ee5bd8
Fixed discovery of correct active period and setting of track time, when seeking.
2016-12-25 21:32:50 -05:00
Thomas Harte
a6d038cad9
Eliminated special case that doesn't seek properly and isn't needed. Added TODO.
2016-12-25 21:32:14 -05:00
Thomas Harte
4fca30b81f
Made the Plus 3 less chatty, documented invalidate_track.
2016-12-25 21:06:58 -05:00
Thomas Harte
26710c988d
Modified SSD to ensure a fully-formatted surface is represented even if no track data is in the source file. This corrects the controller's sense of write success.
2016-12-25 20:40:06 -05:00
Thomas Harte
acc35885cd
Attempted to reduce track invalidations.
2016-12-25 20:38:25 -05:00
Thomas Harte
beaa868079
Factored the MFM parser out into encodings.
2016-12-25 20:00:57 -05:00
Thomas Harte
1349e85d83
[Mostly] fixed track write-back.
2016-12-25 19:19:22 -05:00
Thomas Harte
007c13ec16
Fixed: cycles_per_bit_ isn't a function of the rotational multiplier, it's absolute. Also made sure that exactly hitting the end of a bit counts.
2016-12-25 16:35:39 -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
ec55a25620
It makes sense to simplify these ahead of time.
2016-12-25 12:32:25 -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
Thomas Harte
901f19f89c
Added enough stuff that SSDs attached to a 1770 will now reach the entry point for writing.
2016-12-25 09:46:12 -05:00
Thomas Harte
9d555c4a02
Let's try just declining to pump the PLL while in write mode. Added documentation to explain.
2016-12-25 09:19:18 -05:00
Thomas Harte
b57038edc5
Actually, at least index holes will still be receivable while writing, so this wasn't entirely correct. Probably best to leave it in.
2016-12-25 09:16:09 -05:00
Thomas Harte
af69b21033
This is almost complete, except that it doesn't act appropriately if some bits are written but not enough to cover the entire writing period.
2016-12-24 22:51:26 -05:00
Thomas Harte
f601d796f5
Added documentation.
2016-12-24 22:37:20 -05:00
Thomas Harte
6e94d0c19f
Extended Storage::Disk::Disk to permit write-back of modified tracks, exposed some interface via Storage::Disk::Drive.
2016-12-24 22:11:31 -05:00
Thomas Harte
7f303cfceb
Continued the baby steps.
2016-12-24 21:54:43 -05:00
Thomas Harte
afc6f4129c
Withdrew unused tally.
2016-12-24 21:47:57 -05:00
Thomas Harte
1e416d4af0
Withdrew now-unused and never-implemented API from TimedEventLoop, and the redundant track time count from DiskController.
2016-12-24 21:02:10 -05:00
Thomas Harte
bedea48d03
This is a much better way of dealing with being partway into an incoming event. Subject to eliminating overruns, of course.
2016-12-24 20:54:27 -05:00
Thomas Harte
4cb17143ef
Messing around trying to lock down timing precisely. Which includes formal initial conditions.
2016-12-24 15:18:46 -05:00
Thomas Harte
1e970a9772
Started stepping slowly towards allowing writing on the disk controller, taking the opportunity to introduce self-simplifying behaviour to Storage::Time.
2016-12-24 13:07:23 -05:00
Thomas Harte
e4e0347638
Attempted to consolidate some of the repetition.
2016-12-21 22:17:00 -05:00
Thomas Harte
03579f33f1
Fixed multi-coverage insertion, via an appropriate test.
2016-12-20 21:38:32 -05:00
Thomas Harte
7eca910cc5
Fixed insertion location finding logic, working on the relevant test.
2016-12-20 21:14:05 -05:00
Thomas Harte
823ab9bc34
Completed initial non-trivial test, fixing revealed errors.
2016-12-20 19:15:36 -05:00
Thomas Harte
5a508ea0df
Attempted properly to cover the exactly-equal starts and ends cases, and to improve meaning.
2016-12-20 18:32:49 -05:00
Thomas Harte
63d861a2f3
Switched from C-in-the-brain manual offset counting to using iterators like an ordinary C++ person.
2016-12-20 18:17:54 -05:00
Thomas Harte
6f17076003
Switched to much more logical shared_ptr ownership of PCMSegmentEventSources by Periods.
2016-12-20 18:13:10 -05:00
Thomas Harte
497b2ae4dd
Still by manual inspection: the time for the next event should be provisional until proven acceptable, allowing a proper measurement of time until exiting the period to be taken; also fixed the accumulated period error when seeking back onto the underlying track.
2016-12-20 08:14:16 -05:00
Thomas Harte
6bdde542c5
Edging towards functioning automatic tests, fixed right-period adjustment and slightly decreased searching cost while in the process of adding a test.
2016-12-20 07:52:14 -05:00
Thomas Harte
ec624eaab1
Made an attempt fully to implement PCMPatchedTrack. Which now requires tests.
2016-12-20 07:30:57 -05:00
Thomas Harte
1ef1f6ec69
Attempted to implemnt seek_to and to finish add_segment. Started doing a little of get_next_event but ran out of time for the day.
2016-12-19 21:46:02 -05:00
Thomas Harte
8f937ceac8
Made an attempt to come up with a data structure that actually makes sense (though perhaps this is textbook list rather than vector stuff? I guess it depends on the frequency I expect inserts to occur versus reads) and to implement inserts. Though the Periods aren't yet honoured.
2016-12-19 07:42:43 -05:00
Thomas Harte
e081f224b6
Implemented a very basic PCMTrack test, nevertheless revealing an oversight in PCMSegmentEventSource related to improperly counting to the index hole if the final bit is set. Took that as a message that I should comment and document the event source.
2016-12-18 22:53:24 -05:00
Thomas Harte
a6354ebb01
Reimplemented PCMTrack to use PCMSegmentEventSource, eliminating code duplication.
2016-12-18 21:37:05 -05:00
Thomas Harte
f9a5595dad
Added seeking tests, correcting such errors as uncovered.
2016-12-18 10:19:24 -05:00
