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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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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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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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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c8575fe6e0
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Mild clean ups, and a tweak to permitted top and bottom phase.
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2017-07-16 13:39:08 -04:00 |
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Thomas Harte
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253f9603ed
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Split the normal tape parser class into two in order to add a new option: a PLL-driven tape parser. Decided to see what happens if I attempt to use that to parse CSW Acorn data.
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2017-07-15 19:07:35 -04:00 |
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Thomas Harte
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b743566339
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Corrected under-request of data: was erroneously supplying the size of input as the expected size of output.
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2017-07-15 15:19:03 -04:00 |
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Thomas Harte
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648618d280
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Tweaked bit timing decision.
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2017-07-13 21:26:05 -04:00 |
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Thomas Harte
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ae1a130843
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Fixed: length of 0 is a special case.
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2017-07-13 20:57:27 -04:00 |
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Thomas Harte
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f09fe30af5
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Attempted a full implementation of CSW. All in memory for now.
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2017-07-12 21:23:59 -04:00 |
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Thomas Harte
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33eadb5549
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Started taking further steps towards CSW support; reading the ZLib documentation is next.
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2017-07-11 22:41:10 -04:00 |
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Thomas Harte
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368bff1a82
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Added a shell class that will one day be able to parse CSW files, plus the logic and metadata to instantiate it when a CSW presents itself.
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2017-07-10 21:43:58 -04:00 |
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Thomas Harte
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bcb7c27cc4
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Given that I'm not racing this any more, turned the intended 1 second back into 1 second.
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2017-07-08 19:21:33 -04:00 |
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Thomas Harte
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2f42874fd3
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Another fix to deal with real-time fighting: allow 8 and 18 pulses to be recognised as 1s and 0s. That's because the hand-off from ROM routines to parsing may occur very shortly before the first pulse of a valid sequence, making it look like there's a ghost. A cleaner solution needs to be found, probably revolving around allowing parsers to be attached to tapes and therefore to run constantly.
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2017-07-06 22:33:03 -04:00 |
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Thomas Harte
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84d0e9b4cd
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Accept a pulse that begins exactly on seek_time as being found while seeking.
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2017-07-06 22:31:45 -04:00 |
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Thomas Harte
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a53011f778
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Extended intro and outro length because right now I'm racing this myself. Can return to normal once tape motor control is implemented.
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2017-07-06 22:31:12 -04:00 |
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Thomas Harte
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919fc48cc5
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Fixed dumb out-of-bounds access error.
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2017-06-22 22:28:50 -04:00 |
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Thomas Harte
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52d9ddf9e5
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Gave the binary tape player a more logical assignment of wave level to output level. Which miraculously appears to have been the issue with the ZX80/81 tape loading — the inconsistency of silences seems to have been the issue.
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2017-06-21 22:13:24 -04:00 |
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Thomas Harte
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22de481557
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Made an attempt to get .p/.80 checked and as far as the emulated machine.
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2017-06-12 19:41:59 -04:00 |
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Thomas Harte
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77aa3c187e
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Rebranded ZX80O as ZX80O81P, with an eye to making it accept ZX81 .p files. Adjusted the initial selection part of the static analyser appropriately.
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2017-06-11 21:38:32 -04:00 |
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Thomas Harte
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ee0283c985
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Modified to use an in-memory buffer for file contents.
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2017-06-11 21:35:09 -04:00 |
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Thomas Harte
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2c6414ce11
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Adjusted to allow inspect_waves to swallow a gap before a bit if necessary, increasing the opportunities for its call.
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2017-06-11 18:31:09 -04:00 |
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Thomas Harte
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e5aea632ee
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Updated curly bracket placement.
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2017-06-11 17:29:22 -04:00 |
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Thomas Harte
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256ba4028b
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Rejigged to eliminate semi-duplication of the is-a-file test.
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2017-06-08 21:52:13 -04:00 |
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Thomas Harte
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b07af2660d
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Adjusted to make sure that the very end of a tape is properly measured.
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2017-06-08 21:33:35 -04:00 |
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Thomas Harte
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bc0d70b2f7
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Added: a shout-out when the tape has been exhausted.
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2017-06-08 21:32:27 -04:00 |
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Thomas Harte
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c6e48dfd56
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Given that a final gap is semantically part of describing tape contents, ensured one formally appears before declaring that the tape has ended.
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2017-06-08 21:31:54 -04:00 |
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Thomas Harte
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ee4c8b5ad2
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Ensured final byte plays out.
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2017-06-08 19:51:49 -04:00 |
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Thomas Harte
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7e10c7f9d8
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Relocated the ZX80/81 concept of a 'file' out from Tape into Data, given that it's an exact duplicate of memory.
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2017-06-08 19:09:51 -04:00 |
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Thomas Harte
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c47128f433
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Widened tolerances and ensured zero bits aren't prematurely discarded.
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2017-06-07 17:50:03 -04:00 |
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Thomas Harte
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8aab9acc10
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Eliminated use of the zero level; now definitively returns a low/high input.
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2017-06-07 17:39:29 -04:00 |
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Thomas Harte
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dbd2944c13
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Took an initial run at the ZX80/81 parser.
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2017-06-07 17:27:05 -04:00 |
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Thomas Harte
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4603fa6f24
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Extended explicitly to support a token of lookahead, which is pretty much what was on offer anyway. Also corrected instance variable names, as per better adoption of C++ norms.
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2017-06-07 17:21:57 -04:00 |
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Thomas Harte
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60300851ea
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Started sketching out a tape parser for ZX80 and '81 files. I think this'll help me to verify whether the .O input is working.
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2017-06-07 10:12:13 -04:00 |
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Thomas Harte
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58312ea2b7
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Updated to new standardisation on curly bracket placement.
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2017-06-07 10:05:43 -04:00 |
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Thomas Harte
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cb534d8b85
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Corrected comment.
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2017-06-07 10:05:16 -04:00 |
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Thomas Harte
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4677cebf40
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Rejigged to correct: spaces go after bits, not after bytes.
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2017-06-06 18:29:15 -04:00 |
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Thomas Harte
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7399f3d798
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Caveman debugging in place, it looks like this file is returning nonsense.
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2017-06-06 18:18:55 -04:00 |
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Thomas Harte
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faeecf7665
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Made sure that there's nothing but silence at the end of the tape, even if the .O file is too long.
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2017-06-06 18:16:47 -04:00 |
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Thomas Harte
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8c1769f157
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Made a quick attempt at serialising from ZX80 .O to waves.
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2017-06-04 16:59:26 -04:00 |
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Thomas Harte
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655809517c
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Ensured that there is a subclass of file that is entrusted to load .O/.80 files, and that the code routes such files to it, noting that it should consider whether a ZX80 is required.
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2017-06-04 16:37:03 -04:00 |
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Thomas Harte
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2807e3134f
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Implemented speedy header finding. So that's half of it.
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2017-05-07 20:32:48 -04:00 |
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Thomas Harte
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3f7f2c6117
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'Tape' has joined the new underscore orthodoxy.
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2016-12-03 12:05:19 -05:00 |
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Thomas Harte
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8499783b14
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Dragged multibyte primitives and signature checks up to the base class. Implemented support for Oric MFM-style .DSK, at the file format level.
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2016-11-21 20:47:16 +08:00 |
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Thomas Harte
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31c2548804
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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.
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2016-11-21 20:14:09 +08:00 |
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Thomas Harte
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97811fe590
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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.
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2016-11-15 12:02:03 +08:00 |
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Thomas Harte
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fce48b9b8c
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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.
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2016-11-09 06:37:10 -05:00 |
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Thomas Harte
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c257e7f58d
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Implemented better sync-to-zero and discovered a header counting bug plus, probably, a misleading representation of gaps in the Oric TAP decoder.
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2016-11-07 20:17:06 -05:00 |
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