Thomas Harte
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64865b3f41
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Signedness fixes.
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2017-07-21 21:23:34 -04:00 |
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Thomas Harte
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53f0e1896b
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Made delay_time_ unsigned for safe comparison.
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2017-07-21 21:21:23 -04:00 |
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Thomas Harte
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aaa60dab12
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Fixed signedness of index.
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2017-07-21 21:21:01 -04:00 |
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Thomas Harte
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9b72c445a7
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Fixed indexing type.
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2017-07-21 21:19:46 -04:00 |
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Thomas Harte
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3f609e17b3
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Factored out the table-lookup approach to being a typer, and adjusted so as definitely to limit myself to positive offset table lookups.
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2017-07-21 21:18:51 -04:00 |
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Thomas Harte
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ef03c84b21
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More definitively removed the old sample-offset blending approach to filtering.
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2017-07-21 20:58:55 -04:00 |
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Thomas Harte
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163c0f1b44
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Ensured offset means exactly one thing.
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2017-07-21 20:58:17 -04:00 |
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Thomas Harte
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807e1d36d5
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Resolved signedness mismatch.
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2017-07-21 20:57:48 -04:00 |
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Thomas Harte
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5545cc8bab
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Merge branch 'master' into StricterWarnings
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2017-07-21 20:47:28 -04:00 |
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Thomas Harte
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d6e60c8e3a
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Merge pull request #151 from TomHarte/TZX
Adds partial TZX file format support
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2017-07-21 20:47:08 -04:00 |
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Thomas Harte
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2d8e7e9f8b
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Removed reference to a parameter long-since dead.
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2017-07-21 20:46:25 -04:00 |
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Thomas Harte
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5b4c5b0cbf
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Avoided having two different variables named next_output_run.
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2017-07-21 20:46:08 -04:00 |
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Thomas Harte
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2471ef805b
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Fixed signed/unsigned comparison and potential negative table reference.
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2017-07-21 20:45:49 -04:00 |
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Thomas Harte
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2a7fc86b15
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Enabled stricter warnings.
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2017-07-21 20:44:35 -04:00 |
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Thomas Harte
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3c8bf52fb8
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Believing my 64kb memory map not currently to work, temporarily disabled reference to it in the static analyser.
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2017-07-21 20:43:56 -04:00 |
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Thomas Harte
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a026998682
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Marginally optimised set_offset to avoid resets when possible.
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2017-07-21 20:43:20 -04:00 |
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Thomas Harte
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06ea81fdb2
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Made sure that unrecognised waves don't block the symbol queue, and allowed any type of nonsense to be skipped before finding a byte.
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2017-07-21 20:23:26 -04:00 |
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Thomas Harte
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d69b1e2d11
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Switched parsing logic to looking only for upward zero crossings, that being my new understanding of the ROM.
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2017-07-21 19:39:38 -04:00 |
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Thomas Harte
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a3e0024980
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Chopped time accumulation out of the default Tape process because it's proving to be sufficiently expensive for a TZX as not to be worthwhile. Introduced a cheaper position capturing/restoring method.
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2017-07-21 18:55:03 -04:00 |
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Thomas Harte
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d9a2c32aca
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Made an attempt to obey the proper TZX rules on gaps, and to hit the common-clock-rate Time optimisation.
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2017-07-21 18:21:12 -04:00 |
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Thomas Harte
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e152ed2e61
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Made an attempt to avoid GCD costs when accumulating Times with a common clock rate (/divisor).
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2017-07-21 18:20:27 -04:00 |
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Thomas Harte
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9e975a46a2
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Mildly simplified syntax.
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2017-07-21 18:18:45 -04:00 |
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Thomas Harte
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70af075012
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Determined what appears to be an appropriate workaround for the ZX81 TZX that I've managed to obtain.
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2017-07-19 21:28:33 -04:00 |
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Thomas Harte
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44e5a03cf2
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Removed just-don't-power-the-tape approach to pausing and playing, in favour of being fully communicative.
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2017-07-19 19:21:27 -04:00 |
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Thomas Harte
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c8cee88e33
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Ensured that a stopped tape outputs a false level and took an extra safety check in instantiation.
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2017-07-18 22:49:11 -04:00 |
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Thomas Harte
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35296017b5
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Clarified meaning of is_high_ flag and ensured it is honoured properly.
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2017-07-17 21:36:05 -04:00 |
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Thomas Harte
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130d598ec9
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Corrected some minor out-of-style breaks, and ensured that the name of ZX81 files is returned.
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2017-07-17 19:52:54 -04:00 |
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Thomas Harte
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0350925c1e
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Started sketching out greater support. Mostly TODOs right now, but pulse sequence and pure tone are implemented. I probably also need at least the CSW block to hit everything you might see in a ZX80 or ZX81 tape. Then I can worry about the rest when I have a way to test them.
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2017-07-17 19:38:15 -04:00 |
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Thomas Harte
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94e3dd0d4f
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Merge branch 'master' into TZX
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2017-07-17 19:07:05 -04:00 |
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Thomas Harte
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5d44422230
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Merge pull request #152 from TomHarte/CSWLength
Corrects a false assumption about decompressed CSW size
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2017-07-17 19:06:43 -04:00 |
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Thomas Harte
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eafdd7dbd7
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Corrected decompressed size expectations: it may be up to five times the size of the number of waves, as waves are up to five bytes in length.
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2017-07-17 19:04:25 -04:00 |
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Thomas Harte
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127b584e79
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Ensured that resetting a TZX resets the is-at-end flag.
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2017-07-17 07:52:28 -04:00 |
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Thomas Harte
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2179edc7fe
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Adjusted to allow the very first thing found to be data, and ensured that unrecognised symbols break files just as gaps do.
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2017-07-17 07:43:47 -04:00 |
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Thomas Harte
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9108495586
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Added a safety seek.
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2017-07-17 07:35:53 -04:00 |
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Thomas Harte
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fa617eac6b
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Spotted that pilot and data segments have different encodings — of course! — and attempted to adapt.
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2017-07-17 07:34:10 -04:00 |
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Thomas Harte
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b63971caf7
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Took a first, incorrect, shot at TZX chunk 0x19, the generalised data block.
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2017-07-16 22:40:38 -04:00 |
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Thomas Harte
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7327da6350
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Switched the nascent TZX to use the new PulseQueuedTape.
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2017-07-16 22:06:56 -04:00 |
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Thomas Harte
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8f72fc4a44
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Factored out from the UEF implementation the concept of being a tape that has a queue of pending pulses and manages that queue.
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2017-07-16 22:04:40 -04:00 |
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Thomas Harte
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238348c885
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Performed the initial wiring to announce that this application supports TZX files and to route them to the ZX80/81 static analyser. The TZX class itself does not yet do much beyond basic validation. I think it'll be easiest if it follows in UEF's footsteps in queuing up pulses ahead of time, so some factoring out is now required.
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2017-07-16 21:33:11 -04:00 |
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Thomas Harte
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7b5f93510b
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Fixed the DigitalPhaseLockedLoopBridge bridge, once again fixing tests.
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2017-07-16 20:55:57 -04:00 |
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Thomas Harte
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b3861ff755
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Reduced copying of Pulses.
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2017-07-16 19:49:31 -04:00 |
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Thomas Harte
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5a6b7219b9
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Merge pull request #150 from TomHarte/PLLParsing
Introduces PLL-driven tape parsing of Acorn tapes
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2017-07-16 19:28:51 -04:00 |
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Thomas Harte
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c2bc34fd87
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Eliminated the PLLParser class. I think the proper abstraction if and when another machine requires PLL-esque parsing is probably to template out the Acorn wiring of a PLL to a Parser, and/or generalise the Acorn shifter. It'll be easier to decide when the time comes.
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2017-07-16 19:25:26 -04:00 |
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Thomas Harte
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1d3ae31755
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Abstracted the concept of an Acorn shifter away from being a PLLParser. The Acorn tape parser now skips using that class and uses the shifter. The actual Electron also uses the shifter. So the two are completely aligned. Net result: the Electron should successfully load exactly when static analysis was successful.
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2017-07-16 19:24:01 -04:00 |
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Thomas Harte
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8ddd686049
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Removed redundant variable.
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2017-07-16 19:04:03 -04:00 |
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Thomas Harte
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e5188a60dc
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Settled on the new average-of-length approach to a PLL window sizing, eliminating the old errors-of-phase approach. Since it anchors automatically to the original target clocks per bit, killed the explicit mention of a tolerance.
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2017-07-16 19:03:50 -04:00 |
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Thomas Harte
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e71d13c090
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With the new PLL implementation, switching to a deeper window size returns the Acorn tape parser to: working.
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2017-07-16 17:12:12 -04:00 |
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Thomas Harte
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ba83dfd454
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Merge branch 'master' into PLLParsing
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2017-07-16 17:01:00 -04:00 |
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Thomas Harte
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2fb0aea990
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Updated the C1540 test vessel to the new world.
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2017-07-16 17:00:39 -04:00 |
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Thomas Harte
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51177e4e1f
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Attempted a different implementation of the PLL, that responds to changes only once.
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2017-07-16 16:49:04 -04:00 |
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