93 Commits

Author	SHA1	Message	Date
Thomas Harte	a3b16b6dfa	Further beefs up the list of chunks that this TZX parser can either comprehend or skip.	2017-08-03 12:13:41 -04:00
Thomas Harte	2d2cefb0b0	Adjusted factoring to introduce support for block 10.	2017-08-02 14:36:47 -04:00
Thomas Harte	2fd071e45d	Made an honest attempt at outputting turbo speed data block data. The CPC now at least starts to load.	2017-08-02 14:24:34 -04:00
Thomas Harte	d7a5c3f49a	Added support for the ID 20 block and fixed a minor error in my skip-the-contents version of block 11: length is three bytes long, not two. This gives me enough structure properly to get to the end of my current test CDT, albeit without making any of the noises.	2017-08-02 14:12:34 -04:00
Thomas Harte	6633537fb8	Discovering that there is such a thing as P81 — a ZX81 file without the name omitted — added support for it. Extended FileHolder while I was here to retain the file name and be able to supply its extension, as my quick-fix test-the-last-character approach to o/p/80/81 discrimination stops working with p81 thrown into the mix and this feels like the correct factoring.	2017-07-22 16:02:25 -04:00
Thomas Harte	64865b3f41	Signedness fixes.	2017-07-21 21:23:34 -04:00
Thomas Harte	2d8e7e9f8b	Removed reference to a parameter long-since dead.	2017-07-21 20:46:25 -04:00
Thomas Harte	d9a2c32aca	Made an attempt to obey the proper TZX rules on gaps, and to hit the common-clock-rate Time optimisation.	2017-07-21 18:21:12 -04:00
Thomas Harte	70af075012	Determined what appears to be an appropriate workaround for the ZX81 TZX that I've managed to obtain.	2017-07-19 21:28:33 -04:00
Thomas Harte	35296017b5	Clarified meaning of is_high_ flag and ensured it is honoured properly.	2017-07-17 21:36:05 -04:00
Thomas Harte	0350925c1e	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.	2017-07-17 19:38:15 -04:00
Thomas Harte	94e3dd0d4f	Merge branch 'master' into TZX	2017-07-17 19:07:05 -04:00
Thomas Harte	eafdd7dbd7	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.	2017-07-17 19:04:25 -04:00
Thomas Harte	127b584e79	Ensured that resetting a TZX resets the is-at-end flag.	2017-07-17 07:52:28 -04:00
Thomas Harte	9108495586	Added a safety seek.	2017-07-17 07:35:53 -04:00
Thomas Harte	fa617eac6b	Spotted that pilot and data segments have different encodings — of course! — and attempted to adapt.	2017-07-17 07:34:10 -04:00
Thomas Harte	b63971caf7	Took a first, incorrect, shot at TZX chunk 0x19, the generalised data block.	2017-07-16 22:40:38 -04:00
Thomas Harte	7327da6350	Switched the nascent TZX to use the new PulseQueuedTape.	2017-07-16 22:06:56 -04:00
Thomas Harte	8f72fc4a44	Factored out from the UEF implementation the concept of being a tape that has a queue of pending pulses and manages that queue.	2017-07-16 22:04:40 -04:00
Thomas Harte	238348c885	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.	2017-07-16 21:33:11 -04:00
Thomas Harte	b743566339	Corrected under-request of data: was erroneously supplying the size of input as the expected size of output.	2017-07-15 15:19:03 -04:00
Thomas Harte	ae1a130843	Fixed: length of 0 is a special case.	2017-07-13 20:57:27 -04:00
Thomas Harte	f09fe30af5	Attempted a full implementation of CSW. All in memory for now.	2017-07-12 21:23:59 -04:00
Thomas Harte	33eadb5549	Started taking further steps towards CSW support; reading the ZLib documentation is next.	2017-07-11 22:41:10 -04:00
Thomas Harte	368bff1a82	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.	2017-07-10 21:43:58 -04:00
Thomas Harte	bcb7c27cc4	Given that I'm not racing this any more, turned the intended 1 second back into 1 second.	2017-07-08 19:21:33 -04:00
Thomas Harte	a53011f778	Extended intro and outro length because right now I'm racing this myself. Can return to normal once tape motor control is implemented.	2017-07-06 22:31:12 -04:00
Thomas Harte	22de481557	Made an attempt to get .p/.80 checked and as far as the emulated machine.	2017-06-12 19:41:59 -04:00
Thomas Harte	77aa3c187e	Rebranded ZX80O as ZX80O81P, with an eye to making it accept ZX81 .p files. Adjusted the initial selection part of the static analyser appropriately.	2017-06-11 21:38:32 -04:00
Thomas Harte	ee0283c985	Modified to use an in-memory buffer for file contents.	2017-06-11 21:35:09 -04:00
Thomas Harte	256ba4028b	Rejigged to eliminate semi-duplication of the is-a-file test.	2017-06-08 21:52:13 -04:00
Thomas Harte	c6e48dfd56	Given that a final gap is semantically part of describing tape contents, ensured one formally appears before declaring that the tape has ended.	2017-06-08 21:31:54 -04:00
Thomas Harte	ee4c8b5ad2	Ensured final byte plays out.	2017-06-08 19:51:49 -04:00
Thomas Harte	8aab9acc10	Eliminated use of the zero level; now definitively returns a low/high input.	2017-06-07 17:39:29 -04:00
Thomas Harte	cb534d8b85	Corrected comment.	2017-06-07 10:05:16 -04:00
Thomas Harte	4677cebf40	Rejigged to correct: spaces go after bits, not after bytes.	2017-06-06 18:29:15 -04:00
Thomas Harte	7399f3d798	Caveman debugging in place, it looks like this file is returning nonsense.	2017-06-06 18:18:55 -04:00
Thomas Harte	faeecf7665	Made sure that there's nothing but silence at the end of the tape, even if the .O file is too long.	2017-06-06 18:16:47 -04:00
Thomas Harte	8c1769f157	Made a quick attempt at serialising from ZX80 .O to waves.	2017-06-04 16:59:26 -04:00
Thomas Harte	655809517c	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.	2017-06-04 16:37:03 -04:00
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	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	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	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	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