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 |
|
Thomas Harte
|
4010f36238
|
Ensured tape-formatted PRGs reach a conclusion.
|
2016-09-29 19:12:26 -04:00 |
|
Thomas Harte
|
ca53fac732
|
Switched to assuming a single-sided disk, moved out magic constants.
|
2016-09-26 21:20:30 -04:00 |
|
Thomas Harte
|
572d5587d9
|
Made a first stab at enabling multi-disk machines and thereby obeying (some of) the Plus 3's status register.
|
2016-09-25 21:24:16 -04:00 |
|
Thomas Harte
|
9bbcbd1001
|
Renamed class, intending to turn a Disk::Drive into literally just that, and have a thing with a PLL that consumes events be a Controller.
|
2016-09-25 20:05:56 -04:00 |
|
Thomas Harte
|
523dbb9678
|
This'll do for getting the ADF into the machine.
|
2016-09-25 18:32:26 -04:00 |
|
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
|
8a1b805d11
|
Fixed file offset calculation for single-sided images.
|
2016-09-19 07:34:10 -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
|
d1c861d3a5
|
That should be that, I hope.
|
2016-09-18 21:09:32 -04:00 |
|
Thomas Harte
|
02c9a82cb5
|
Edging towards SSD/DSD support. Hold on!
|
2016-09-18 19:32:08 -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
|
6454508db8
|
Added a quick bit of documentation.
|
2016-09-18 10:30:52 -04:00 |
|
Thomas Harte
|
65b568003d
|
Clarified TODO.
|
2016-09-18 10:29:45 -04:00 |
|
Thomas Harte
|
8c2bf099ad
|
Cut down to one GCD and clarified variable names, getting more explicit about what's going on.
|
2016-09-18 10:24:09 -04:00 |
|
Thomas Harte
|
79ef38b123
|
Attempted to use the new get_cycles_until_next_event method to take some repetition outside of the PLL and drive event loops.
|
2016-09-17 22:02:38 -04:00 |
|
Thomas Harte
|
dbb758aaf1
|
Workaround for a weird bug that suddenly appears to manifest: gzgetc is returning the file name, not bytes from the file. Seems to be related to improper initialisation of the next field within the gzFile header. I can't immediately see where ZLib intends to do that so it's a bit mysterious. But the larger-than-8 readers could probably save time by reading in blocks anyway.
|
2016-09-17 22:01:25 -04:00 |
|
Thomas Harte
|
14a9edcf5d
|
Made an attempt to do the time base conversion upfront, saving a lot of hassle and allowing greater prediction.
|
2016-09-17 19:52:27 -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
|
e3571e8b9e
|
Added insurance against an infinite loop should the tape be exhausted.
|
2016-09-12 22:22:23 -04:00 |
|
Thomas Harte
|
eeec516fa6
|
Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator.
|
2016-09-11 17:09:00 -04:00 |
|