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.
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2016-12-31 15:25:11 -05:00 |
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Thomas Harte
|
a8bc9d830e
|
Removed leftover very temporary debugging aid.
|
2016-12-28 23:03:05 -05:00 |
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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 |
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Thomas Harte
|
4adcb46665
|
Fixed FM-mode CRC generation.
|
2016-12-28 19:51:27 -05:00 |
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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.
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2016-12-28 19:26:21 -05:00 |
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Thomas Harte
|
7a627b782d
|
Reintroduced writing of MFM sync marks when writing a sector.
|
2016-12-28 18:48:50 -05:00 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
|
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
|
c304db0f5a
|
Deintegrated the busy flag and the interrupt request line, as the latter is reset by status reads. Which also means I can start reporting the WD INTRQ line status directly from the Microdisc. That appears to be correct, rather than honouring the Microdisc IRQ select there.
|
2016-12-06 21:16:29 -05:00 |
|
Thomas Harte
|
ca50606e1d
|
Restored Vic audio.
|
2016-12-03 17:10:47 -05:00 |
|
Thomas Harte
|
36bc558798
|
Converted all 'Components' to postfix underscores.
|
2016-12-03 10:51:09 -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
|
0a0775c3bd
|
Removed earlier hacky solution.
|
2016-12-01 20:16:11 -05:00 |
|
Thomas Harte
|
442986ee2c
|
Introduced a head loading path for 1793 machines.
|
2016-12-01 20:12:22 -05:00 |
|
Thomas Harte
|
82899f2f47
|
Ensured flag setting is atomic, removed duplication of interrupt request versus busy, found better names for the personality testers, unified delegate protocol.
|
2016-12-01 07:41:52 -05:00 |
|
Thomas Harte
|
b31fd11470
|
Fixed reporting of data request line, initial status values.
|
2016-11-30 22:39:55 -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
|
84cb07613d
|
Checked some documentation more thoroughly; the 1793 has quite different spin-up (/head load) semantics. So it's another distinct personality. Grrr.
|
2016-11-27 20:39:08 -08:00 |
|
Thomas Harte
|
02ba1f220f
|
The '72 seems to be a '70 with altered timing. So worth differentiating.
|
2016-11-27 21:06:17 +08:00 |
|
Thomas Harte
|
2c01f9dbed
|
Added meaningful TODOs.
|
2016-11-27 08:42:39 +08:00 |
|
Thomas Harte
|
2f459690d4
|
It would appear the 1770 and 1773 actually differ in relation to the (non-sensical) ability not to spin-up for a Type 2, and whether a side compare can occur. So the WD1770 class now requires a personality to be specified. Which it singly fails to honour.
|
2016-11-26 23:29:30 +08:00 |
|
Thomas Harte
|
d8ecc52de8
|
Temporarily disabled spin-down as harmful to the status register if following anything other than a Type 1 command.
|
2016-11-26 22:27:20 +08:00 |
|
Thomas Harte
|
b9677c9927
|
Consolidated interrupt request setting.
|
2016-11-26 09:41:53 +08:00 |
|
Thomas Harte
|
d5f9e0aa3b
|
Ensured there's no such thing as a zero-cycle operation, even if i don't yet know exactly what I should be doing.
|
2016-11-25 21:24:25 +08:00 |
|
Thomas Harte
|
4af678d2ed
|
Gave the Microdisc a clock signal, added just enough of force interrupt to avoid a spurious belief that a type 3 command has started.
|
2016-11-25 20:51:39 +08:00 |
|
Thomas Harte
|
d4a1961378
|
Added getters for the IRQ and DRQ lines plus a delegate to receive changes; adjusted code so that the two lines signal.
|
2016-11-21 13:21:49 +08:00 |
|
Thomas Harte
|
7eeaac23e7
|
Reversed myself. I once again do not think the clock is divided by 256 for envelopes.
|
2016-11-11 20:31:48 -05:00 |
|
Thomas Harte
|
77987bf31e
|
Decided to go with divide by 256 for the envelope counter after all.
|
2016-11-09 21:51:56 -05:00 |
|
Thomas Harte
|
77ce200fbb
|
Simplified/corrected AY tone/noise mixer logic, and made a new guess at the effect of reading registers that are smaller than 8 bits.
|
2016-11-09 21:21:17 -05:00 |
|
Thomas Harte
|
fa65cc2058
|
Resolved type conversion error.
|
2016-11-05 12:57:01 -04:00 |
|
Thomas Harte
|
30c670f8de
|
Ensured programmatic setting of the timers occurs during phase 2 _instead_ of counting.
|
2016-11-04 21:30:18 -04:00 |
|
Thomas Harte
|
21604376e6
|
Reintroduced clocking of the AY and boxed in the range of the master divider a little further.
|
2016-10-30 22:51:08 -04:00 |
|
Thomas Harte
|
ad00304e8a
|
Fixed 6522 countdown.
|
2016-10-28 21:05:42 -04:00 |
|
Thomas Harte
|
4fab794747
|
Added a direct-to-two-cycles emulation path for 6522 owners.
|
2016-10-27 21:13:25 -04:00 |
|
Thomas Harte
|
2eda0b3c86
|
Attempted to simplify the logic behind the most common 6522 usage.
|
2016-10-27 21:06:31 -04:00 |
|
Thomas Harte
|
fd823dc222
|
Settled on terminology.
|
2016-10-23 20:42:49 -04:00 |
|
Thomas Harte
|
b12f2f2796
|
Switched to more straightforward version of two-step loop, dealing with my mistaken dealing of when _master_divider&15 == 0 upon entry without adding an extra sanity check. Am also temporarily on non-modulo logic for tone generation, for a profiling test.
|
2016-10-23 20:32:48 -04:00 |
|
Thomas Harte
|
583db88299
|
Added a dispatch queue-powered Apple implementation of the async task queue, removed any mention of skip_samples in the AY since it isn't implemented.
|
2016-10-22 21:58:45 -04:00 |
|
Thomas Harte
|
33e628a096
|
Made an attempt to eliminate what amounts to manual division.
|
2016-10-21 22:16:44 -04:00 |
|
Thomas Harte
|
46a3c0922f
|
Slightly simplified code, fixed divider.
|
2016-10-21 22:12:44 -04:00 |
|
Thomas Harte
|
d7c0c49715
|
Might as well be consistent with divider loads.
|
2016-10-21 20:07:14 -04:00 |
|
Thomas Harte
|
782ef960e1
|
Sought both to [start to] optimise the AY and correct divider reloads. It turns out that conditionals aren't that troubling. But I can probably eliminate the counters.
|
2016-10-21 20:05:38 -04:00 |
|
Thomas Harte
|
cd59eb5f43
|
Implemented non-linear volume.
|
2016-10-19 23:07:51 -04:00 |
|
Thomas Harte
|
b59da7d4bc
|
Added some documentation.
|
2016-10-19 22:47:44 -04:00 |
|
Thomas Harte
|
08275c6241
|
Fixed mixer IO bit usage.
|
2016-10-19 22:22:15 -04:00 |
|
Thomas Harte
|
59162228ef
|
Reduced mask for clarity.
|
2016-10-19 22:14:05 -04:00 |
|
Thomas Harte
|
319d7c2b12
|
Fixed premature wrapping of the envelope, played about with whether that should be subject to a predivision by 256. It feels unlikely?
|
2016-10-19 22:12:51 -04:00 |
|
Thomas Harte
|
6073906c39
|
Commented and fixed mistake that would equate any noise divider > 32768 with 0.
|
2016-10-19 21:51:35 -04:00 |
|
Thomas Harte
|
101f168ea4
|
Made an attempt to tidy up.
|
2016-10-19 21:43:18 -04:00 |
|
Thomas Harte
|
ada37abe23
|
Made an attempt to implement noise and envelopes. Not quite right yet.
|
2016-10-19 21:13:22 -04:00 |
|
Thomas Harte
|
bd6e6674a0
|
Fixed signed shift assumption and noise-related register test.
|
2016-10-18 22:20:12 -04:00 |
|
Thomas Harte
|
9669a5ec9b
|
Switched to a more authentic interfacing to the AY.
|
2016-10-18 19:32:15 -04:00 |
|
Thomas Harte
|
43612e1ca2
|
Made an attempt to eliminate conditionals (running before I can walk?) and started edging towards an envelope generator.
|
2016-10-17 08:03:38 -04:00 |
|
Thomas Harte
|
9730e8247f
|
Ensured propagation of synchronise messages, added enough to do plain tone. Probably. So: noise and envelopes missing. And it's all far too quiet.
|
2016-10-15 21:04:21 -04:00 |
|
Thomas Harte
|
51bdac27ae
|
Made some AY advances; it's now being polled for samples and collecting more information on what it needs to output.
|
2016-10-15 17:45:39 -04:00 |
|
Thomas Harte
|
288d10c253
|
Got some keyboard reaction.
|
2016-10-14 21:44:15 -04:00 |
|
Thomas Harte
|
138eabcff4
|
Continued in my effort to wire up a keyboard. Will need further to continue.
|
2016-10-14 21:35:15 -04:00 |
|
Thomas Harte
|
d8e4c488c2
|
Started iterating towards having an AY and a fully-working keyboard.
|
2016-10-14 21:18:03 -04:00 |
|
Thomas Harte
|
922dd6a586
|
Hit up the other two kinds of audio generator.
|
2016-10-07 17:10:00 -04:00 |
|
Thomas Harte
|
79412dc84d
|
Upped MFM clock cycles, switched back to using the typer for the ADFS and adjusted ADFS ROM slots.
|
2016-09-28 21:28:34 -04:00 |
|
Thomas Harte
|
91235c7fd7
|
Fixed issue whereby parts of data that merely looked like index or ID address marks within tracks caused a resynchronisation of the tokeniser.
|
2016-09-27 07:36:37 -04:00 |
|
Thomas Harte
|
6330e5706c
|
Fixed seek verify. First ADFS directory is visible.
|
2016-09-25 21:44:46 -04:00 |
|
Thomas Harte
|
4db086949a
|
Made an attempt to add MFM decoding to the 1770; ensured something is returned when reading the Plus 3 status register again.
|
2016-09-25 21:38:52 -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
|
6084020ab3
|
Added shift-break as a better way to boot suitable disks. Continued attempting to clean the 1770.
|
2016-09-25 14:11:22 -04:00 |
|
Thomas Harte
|
a538b45213
|
Sought to implement the verify step of type 1 commands.
|
2016-09-25 09:54:49 -04:00 |
|
Thomas Harte
|
0918751802
|
Fixed stepping out.
|
2016-09-24 22:48:45 -04:00 |
|
Thomas Harte
|
9e1d4c8b01
|
Fixed an initial setup error with seek.
|
2016-09-24 22:43:12 -04:00 |
|
Thomas Harte
|
d50629e6aa
|
This is clearly the winning solution. Edited down.
|
2016-09-24 22:36:38 -04:00 |
|
Thomas Harte
|
07ff5138b7
|
The catalogue now loads.
|
2016-09-24 22:35:34 -04:00 |
|
Thomas Harte
|
1b69ad0fd4
|
This attempts to implment sector reading. DFS reports an error.
|
2016-09-24 22:29:02 -04:00 |
|
Thomas Harte
|
ce4100e5b9
|
Fixed slots for DFS and ADFS to sideways RAM; continued working on the 1770 to get as far as trying to get the body of a sector.
|
2016-09-24 22:04:54 -04:00 |
|
Thomas Harte
|
7154e8986e
|
Fixed stepping delay.
|
2016-09-24 20:16:23 -04:00 |
|
Thomas Harte
|
53522e28e2
|
Performed an about-face on how this should probably be implemented. Now forsaking the state machine in favour of a macro'd switch-for-cooperative-event-based-messaging implementation. Let's see how this ends up looking.
|
2016-09-24 20:12:45 -04:00 |
|
Thomas Harte
|
88bbeedad3
|
Set actual bit length.
|
2016-09-22 21:28:23 -04:00 |
|
Thomas Harte
|
75eb62b577
|
One painful step at a time, this now starts the disk rotating and gets as far as deciding whether it's about to head off on a read or a write.
|
2016-09-22 21:25:31 -04:00 |
|
Thomas Harte
|
8db0030068
|
Fixed ROM loading by the Electron, turned the WD1770 into a 'disk drive' (it'll do for now), persuaded it to get all the way through a very specifically convenient type 1 command.
|
2016-09-20 22:14:33 -04:00 |
|
Thomas Harte
|
7a34ae0da6
|
This is the start of my slog through type 1 commands. I kind of need to figure out what I'm doing about drives and PLLs now though.
|
2016-09-20 16:58:23 -04:00 |
|
Thomas Harte
|
3b97b038b9
|
Corrected and sketched out state machine far enough to get to a complaint about unhandled work.
|
2016-09-20 15:56:31 -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
|
bcf91de7e9
|
Declared support for the Acorn disk files, started hammering out an encoder.
|
2016-09-18 13:35:54 -04:00 |
|
Thomas Harte
|
e3daf80564
|
Added a file for the 1770, at least.
|
2016-09-17 18:01:00 -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 |
|
Thomas Harte
|
1541273785
|
Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately.
|
2016-08-21 18:13:31 -04:00 |
|
Thomas Harte
|
c783090980
|
It turns out that the Vic has a 1.6Khz low-pass filter. So added that.
|
2016-08-21 12:13:41 -04:00 |
|
Thomas Harte
|
8d839c5278
|
I think this is correct. And have explained why.
|
2016-08-20 16:54:43 -04:00 |
|