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.
|
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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Thomas Harte
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80702616ea
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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 |
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Thomas Harte
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7205c3f82b
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Made an attempt to build in Oric slow/fast detection.
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2016-11-06 21:31:10 -05:00 |
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Thomas Harte
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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)
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2016-11-06 19:22:09 -05:00 |
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Thomas Harte
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353c1c8ea3
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Shifted ownership of PETSCII -> string conversion down to the storage layer, where it's useful for tape parsing.
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2016-11-06 18:43:51 -05:00 |
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Thomas Harte
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1b15bc3a6c
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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).
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2016-11-06 16:13:13 -05:00 |
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Thomas Harte
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827a919368
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This is an initial attempt at reading actual tape data. It loses sync though.
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2016-11-02 22:30:53 -04:00 |
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Thomas Harte
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d3634488e6
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Made an attempt better to deal with multiple-file TAPs; also started using a zero level for the header/data gap.
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2016-10-24 21:59:06 -04:00 |
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Thomas Harte
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cbbd31c2e0
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Explained what this recently factored-out class does, and removed code from the header.
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2016-10-20 19:33:25 -04:00 |
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Thomas Harte
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cc0b70828b
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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?
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2016-10-16 22:15:24 -04:00 |
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Thomas Harte
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fae1bb0db9
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First successful game loaded! It turns out exactly one '$' is correct. Probably.
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2016-10-15 21:49:41 -04:00 |
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Thomas Harte
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952a24f769
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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!
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2016-10-15 21:39:53 -04:00 |
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Thomas Harte
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a608bbebfb
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Performed enough wiring to put the onus back onto OricTAP to do appropriate things.
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2016-10-15 21:32:59 -04:00 |
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Thomas Harte
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6d7c3f6ac2
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Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric.
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2016-10-15 21:21:18 -04:00 |
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Thomas Harte
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4f78d693e9
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Reintroduced gap as a string of 1s, made an attempt to look up bit ordering. Still unclear on high/low versus low/high.
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2016-10-11 08:07:51 -04:00 |
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Thomas Harte
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70f004efbb
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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.
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2016-10-11 07:57:10 -04:00 |
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Thomas Harte
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df01c78039
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It's a bit of a mess but this is probably close to appropriate for Oric TAP files.
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2016-10-11 07:39:48 -04:00 |
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Thomas Harte
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4010f36238
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Ensured tape-formatted PRGs reach a conclusion.
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2016-09-29 19:12:26 -04:00 |
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Thomas Harte
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dbb758aaf1
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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.
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2016-09-17 22:01:25 -04:00 |
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Thomas Harte
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e3571e8b9e
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Added insurance against an infinite loop should the tape be exhausted.
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2016-09-12 22:22:23 -04:00 |
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Thomas Harte
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eeec516fa6
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Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator.
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2016-09-11 17:09:00 -04:00 |
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Thomas Harte
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1de6097f06
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Shuffled C stuff out on top.
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2016-09-08 21:08:03 -04:00 |
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Thomas Harte
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24251a2768
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Negligible indentation fix.
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2016-09-08 07:49:43 -04:00 |
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Thomas Harte
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01e5dae512
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Threw in 300-baud support. Why not?
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2016-09-08 07:48:20 -04:00 |
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Thomas Harte
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3e925e80a3
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Added a field-filling constructor for pulses.
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2016-09-08 07:41:44 -04:00 |
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Thomas Harte
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1e7b5330f5
|
More or less rewrote, to use a filled-per-chunk buffer of upcoming pulses rather than working them out as requests come. Which is more straightforward — all the code for a particular chunk goes in exactly one place — and much easier to extend. So threw in a provisional 0104 implementation.
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2016-09-08 07:41:26 -04:00 |
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Thomas Harte
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d7d5f24aab
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Attempted, at least, to insert a dummy byte as per the specification.
|
2016-09-06 21:51:04 -04:00 |
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Thomas Harte
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11850b872d
|
Sought to emulate 0111 as a longer 0110 to test a particular HQ UEF. Some progress. Not great.
|
2016-09-05 18:28:43 -04:00 |
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Thomas Harte
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21e5f407d8
|
I need to get a bit more definitive on naming but this gets all the way to setting a configuration upon an Electron.
|
2016-08-31 22:03:42 -04:00 |
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Thomas Harte
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963a479908
|
Made a quick first attempt at getting a file name from Acorn tape, failing terribly but at least formalising tapes being able to signal their end.
|
2016-08-29 21:53:06 -04:00 |
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Thomas Harte
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82c8459055
|
Minor tidying of namespace usage declarations.
|
2016-08-27 17:18:12 -04:00 |
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Thomas Harte
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c0402d0c2b
|
Gave tapes their own namespace.
|
2016-08-27 17:09:45 -04:00 |
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Thomas Harte
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8c333059a8
|
Turning this into a slog: gave UEF a more appropriate name, got as far as now having to decide what to do about ROMs as to structure. I guess they're machine specific, so specific classes?
|
2016-08-27 16:40:21 -04:00 |
|
Thomas Harte
|
73ce67bee8
|
Added some documentation of the intention here.
|
2016-08-19 11:04:59 -04:00 |
|
Thomas Harte
|
4edd1214f1
|
This has now successfully loaded its first PRG-as-a-tape.
|
2016-08-19 10:58:42 -04:00 |
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Thomas Harte
|
2935848f35
|
Adopted header/header/data/data pattern. But still not complete joy.
|
2016-08-17 08:03:34 -04:00 |
|
Thomas Harte
|
e5523dbbed
|
This gets through loading the first(/only?) copy. I tried repeating it with a bit-flipped header, now I'm trying repeating the header with a different file type. More documentation searching to do, I guess.
|
2016-08-16 22:17:08 -04:00 |
|
Thomas Harte
|
1bca9aa2bb
|
Fixed parity: now calculated from the actual byte and works the other way around. The Vic now believes it is loading the actual program. So I guess bytes, headers and the lead-in is working.
|
2016-08-16 21:41:09 -04:00 |
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Thomas Harte
|
dfe9fb83ef
|
This proves that bytes are being deposited properly. For the first 36 anyway, and with no announcement.
|
2016-08-16 21:09:50 -04:00 |
|
Thomas Harte
|
12f8aff65b
|
Lengths I'd taken seem to have been for dipoles, not single poles. So I just doubled the clock rate. Also I was producing each dipole as high then low, when they should probably be low then high. The Vic now at least recognises that something is happening on the tape.
|
2016-08-16 19:46:53 -04:00 |
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Thomas Harte
|
3a23d5d8cf
|
Adjusted the check digit.
|
2016-08-15 22:44:36 -04:00 |
|
Thomas Harte
|
dbe47f3f45
|
I've obviously misunderstood something as, as far as I'm concerned, this should at least get me a 'LOADING'.
|
2016-08-15 22:40:05 -04:00 |
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Thomas Harte
|
7994148f55
|
I'm starting to make a little headway, I think: this performs lead-ins and countdowns, though with no actual data or anything as helpful as that.
|
2016-08-15 22:10:53 -04:00 |
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Thomas Harte
|
7e2b4554ea
|
This likely forms the Commodore dipoles correctly. It just stays stuck in leader tone forever is all.
|
2016-08-15 20:08:50 -04:00 |
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Thomas Harte
|
38aec44d85
|
Made sufficient changes for the Vic itself to believe it can recast a PRG as a tape and insert it that way. So now the ball is in the court of: how the heck are Commodore tapes encoded?
|
2016-08-15 19:44:41 -04:00 |
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Thomas Harte
|
3aa40212f3
|
Fixed minor documentation error; admitted that this class didn't invent the idea of a pulse.
|
2016-08-15 19:37:21 -04:00 |
|
Thomas Harte
|
ee2a7c9415
|
Added slightly to exposition, to match other formats.
|
2016-08-01 06:54:57 -04:00 |
|
Thomas Harte
|
2799a87218
|
Reduced possibility of overflow on LCM, improved commenting widely, removed one stale piece of G64 bootstrapping caveman stuff.
|
2016-08-01 06:04:55 -04:00 |
|
Thomas Harte
|
89a1881fef
|
Started turning the 1540 into an actual disk drive.
|
2016-07-29 11:03:09 -04:00 |
|
Thomas Harte
|
0e581c7607
|
Factored out the stuff of running a timed event loop from the TapePlayer.
|
2016-07-29 07:15:46 -04:00 |
|
Thomas Harte
|
e55db0cfe8
|
Made an attempt to eliminate creeping tape processing accuracy misses, which implied factoring out the GCM and LCD functions, which I then felt didn't really amount to signal processing.
|
2016-07-29 05:19:01 -04:00 |
|
Thomas Harte
|
9e3d6b762b
|
Sketched out the generic interface for a disk, documenting it and the tape interface while I'm here.
|
2016-07-10 08:54:39 -04:00 |
|
Thomas Harte
|
c306d705e1
|
Made a quick first attempt at all-the-way-through tape wiring for the Vic.
|
2016-06-26 19:43:09 -04:00 |
|
Thomas Harte
|
37ba42a52f
|
Factored out the stuff of playing a tape, started basic sketch of the Vic-related classes.
|
2016-06-26 19:03:57 -04:00 |
|
Thomas Harte
|
ee19417ded
|
Made an attempt quickly to implement parsing of the Commodore .TAP file format.
|
2016-06-25 16:09:32 -04:00 |
|
Thomas Harte
|
21ca1ef86b
|
Started attempting to clarify instance variable usage.
|
2016-03-12 23:19:10 -05:00 |
|
Thomas Harte
|
2b8fb5b615
|
Made an attempt to fix my 0114 implementation.
|
2016-02-20 23:13:58 -05:00 |
|
Thomas Harte
|
f7fc7cb932
|
Implemented some portion of 0114; ensured I'm safely skipping chunks in all cases.
|
2016-02-20 22:18:00 -05:00 |
|
Thomas Harte
|
ec3cccbb0d
|
Working towards HQ UEF support: fixed bug whereby writing to tape output would reset input pulse stepper; added support for chunk 0116 and approximate support for 0113.
|
2016-02-20 22:03:14 -05:00 |
|