Thomas Harte
71dbd78cf2
If asynchronous background processing is to occur on tracks then, given that they inherently have state, they'll need to be copyable, and ideally 'cheaply' (though it's not too great a priority). So started implementing appropriate copy constructors. Also introduced an extra level of indirection to PCMSegmentEventSource so that it can copy itself without copying the underlying PCMSegment, which is 95% of the heft of a track in all currently-implemented cases.
2016-12-30 14:23:26 -05:00
Thomas Harte
f88f3c65e9
Removed duplicated newline.
2016-12-30 14:21:36 -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
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
bbd94749f4
... and I guess an instant maximal simplification is also easy if length ends up being 0
2016-12-29 11:02:21 -05:00
Thomas Harte
54900ca3fb
Addition and subtraction can end immediately without performing any extra work if the operand is 0
2016-12-29 11:00:47 -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
d606bd7ce5
Added saturation test, fixed code as indicated.
2016-12-24 23:29:37 -05:00
Thomas Harte
09ff9d6a26
Introduced a couple more floating-point conversion tests, fixed errors uncovered.
2016-12-24 23:21:19 -05:00
Thomas Harte
e25195a718
Added a single test for Storage::Time, discovering that I had the wrong sign on float conversions.
2016-12-24 22:59:01 -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
4d4852bb78
Ensured that Times start life in their simplest form.
2016-12-24 15:18:03 -05:00
Thomas Harte
4728bda0a2
Added an additional constructor to make sure that regular ints go to the correct place.
2016-12-24 13:27:57 -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
Thomas Harte
3297f6d545
Made an attempt to implement seek_to on PCMSegmentEventSource, taking account of off-by-half counting.
2016-12-17 22:44:33 -05:00
Thomas Harte
3116a2cf4c
Realised I was actually testing PCMSegmentEventSource, not PCMSegment; implemented a spread of tests; hence fixed PCMSegmentEventSource.
2016-12-17 21:47:13 -05:00
Thomas Harte
254cc41fd6
Made an attempt to separate and isolate the stuff of creating flux events from a PCMSegment, eventually to factor that out of PCMTrack and make it available also to PCMPatchedTrack.
2016-12-17 21:13:57 -05:00
Thomas Harte
313db75303
Ensured the patchable track owns its underlying track.
2016-12-17 18:17:22 -05:00
Thomas Harte
f1a08b7ab5
Opted to pass times by reference and added enough to PCMPatchedTrack that it could start being used by the disk controller, albeit that it doesn't work.
2016-12-17 16:26:45 -05:00
Thomas Harte
dc08a23ceb
This is going to be a slow walk, I think. This class attempts to be the scratchpad which will hold in-memory track modifications.
2016-12-16 19:20:38 -05:00
Thomas Harte
c4041b06a8
This'll do as a write interface, won't it?
2016-12-07 22:19:20 -05:00
Thomas Harte
3f7f2c6117
'Tape' has joined the new underscore orthodoxy.
2016-12-03 12:05:19 -05:00
Thomas Harte
0dc2aa6454
Commuted all of 'Storage' other than 'Tape' to postfix underscores.
2016-12-03 11:59:28 -05:00
Thomas Harte
81ee834530
As well as a bunch of logging, reinstated rotation position preservation across tracks.
2016-12-02 18:36:47 -05:00
Thomas Harte
93c573bfa9
Implemented missing status bits (other than the index hole), and a head loading delay for the Microdisc.
2016-12-01 21:13:16 -05:00
Thomas Harte
2222cb65d6
Split the status up into flags, assembled into a register upon demand. Attempted to implement some of the differences between the 1770/1772 and 1773/1793. Albeit with a motor fix still in place.
2016-11-30 22:26:02 -05:00
Thomas Harte
f44542c18c
Improved naming: this now explains what, not the mechanics of how.
2016-11-26 23:35:11 +08:00
Thomas Harte
5c8ecd3051
It probably needs a better name, but hastily implemented track caching at the Disk level.
2016-11-26 14:27:06 +08:00
Thomas Harte
2f86b07cfa
Added a parser for Oric-format MFM disks. Causing my first disk to load!
2016-11-26 13:40:10 +08:00
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
b180f04c87
Okay, so this file format wasn't what I hoped it was. It's another hack. Lots of work to do.
2016-11-26 10:19:10 +08:00
Thomas Harte
7613755f94
Fixed addressing: types are 1 and 2, not 0 and 1.
2016-11-26 10:13:12 +08:00
Thomas Harte
8499783b14
Dragged multibyte primitives and signature checks up to the base class. Implemented support for Oric MFM-style .DSK, at the file format level.
2016-11-21 20:47:16 +08:00
Thomas Harte
31c2548804
Created a base class for the boilerplate fopen stuff, switched as many classes as possible to its use, switched to postfix underscores and non-camelCase names.
2016-11-21 20:14:09 +08:00
Thomas Harte
97811fe590
Made minor fix to ensure that a header that appears to extend beyond the end of an Oric .TAP doesn't create an ostensibly endless tape.
2016-11-15 12:02:03 +08:00
Thomas Harte
fce48b9b8c
I am instructed that the Oric actually catches only positive transitions, and compares the distance between those to a threshold. So here's an altered version of the tape parser that does that.
2016-11-09 06:37:10 -05:00
Thomas Harte
c257e7f58d
Implemented better sync-to-zero and discovered a header counting bug plus, probably, a misleading representation of gaps in the Oric TAP decoder.
2016-11-07 20:17:06 -05:00
Thomas Harte
80702616ea
Had a quick go at using the Oric parser for static analysis. Found out that synchronisation is lost. Need to investigate.
2016-11-06 22:56:38 -05:00
Thomas Harte
7205c3f82b
Made an attempt to build in Oric slow/fast detection.
2016-11-06 21:31:10 -05:00
Thomas Harte
d1ef2f7c63
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation.
...
(while adding support for the slow tape encoding mode)
2016-11-06 19:22:09 -05:00
Thomas Harte
353c1c8ea3
Shifted ownership of PETSCII -> string conversion down to the storage layer, where it's useful for tape parsing.
2016-11-06 18:43:51 -05:00
Thomas Harte
1b15bc3a6c
Started relocating the tape parsers down from static analyser to storage, to signify that they may be used by the emulation (if fast loading is supported on that machine).
2016-11-06 16:13:13 -05:00
Thomas Harte
827a919368
This is an initial attempt at reading actual tape data. It loses sync though.
2016-11-02 22:30:53 -04:00
Thomas Harte
d3634488e6
Made an attempt better to deal with multiple-file TAPs; also started using a zero level for the header/data gap.
2016-10-24 21:59:06 -04:00
Thomas Harte
cbbd31c2e0
Explained what this recently factored-out class does, and removed code from the header.
2016-10-20 19:33:25 -04:00
Thomas Harte
cc0b70828b
Removed attempt at multiple-file logic, at least for the time being. Starting to wonder whether I actually need anything beyond a literal streaming of bytes?
2016-10-16 22:15:24 -04:00
Thomas Harte
fae1bb0db9
First successful game loaded! It turns out exactly one '$' is correct. Probably.
2016-10-15 21:49:41 -04:00
Thomas Harte
952a24f769
A quick hard-wiring of the OricTAP code to get the first file in a .tap correct, damn the rest, and I'm getting some on-screen feedback. Hooray!
2016-10-15 21:39:53 -04:00
Thomas Harte
a608bbebfb
Performed enough wiring to put the onus back onto OricTAP to do appropriate things.
2016-10-15 21:32:59 -04:00
Thomas Harte
6d7c3f6ac2
Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric.
2016-10-15 21:21:18 -04:00
Thomas Harte
4f78d693e9
Reintroduced gap as a string of 1s, made an attempt to look up bit ordering. Still unclear on high/low versus low/high.
2016-10-11 08:07:51 -04:00
Thomas Harte
70f004efbb
This may be feeding bits in the wrong direction or calculting the wrong parity or doing something else amiss but should now be correct as to bytes.
2016-10-11 07:57:10 -04:00
Thomas Harte
df01c78039
It's a bit of a mess but this is probably close to appropriate for Oric TAP files.
2016-10-11 07:39:48 -04:00
Thomas Harte
abf47efd40
Factored out Commodore is-a-ROM test, allowing it to be used from the Commodore analyser and thereby allowing ROMs to get as far as the machine again.
2016-09-29 19:39:13 -04:00
