91 Commits

Author	SHA1	Message	Date
Thomas Harte	256ba4028b	Rejigged to eliminate semi-duplication of the is-a-file test.	2017-06-08 21:52:13 -04:00
Thomas Harte	b07af2660d	Adjusted to make sure that the very end of a tape is properly measured.	2017-06-08 21:33:35 -04:00
Thomas Harte	bc0d70b2f7	Added: a shout-out when the tape has been exhausted.	2017-06-08 21:32:27 -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	7e10c7f9d8	Relocated the ZX80/81 concept of a 'file' out from Tape into Data, given that it's an exact duplicate of memory.	2017-06-08 19:09:51 -04:00
Thomas Harte	c47128f433	Widened tolerances and ensured zero bits aren't prematurely discarded.	2017-06-07 17:50:03 -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	dbd2944c13	Took an initial run at the ZX80/81 parser.	2017-06-07 17:27:05 -04:00
Thomas Harte	4603fa6f24	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.	2017-06-07 17:21:57 -04:00
Thomas Harte	60300851ea	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.	2017-06-07 10:12:13 -04:00
Thomas Harte	58312ea2b7	Updated to new standardisation on curly bracket placement.	2017-06-07 10:05:43 -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	2807e3134f	Implemented speedy header finding. So that's half of it.	2017-05-07 20:32:48 -04:00
Thomas Harte	3f7f2c6117	'Tape' has joined the new underscore orthodoxy.	2016-12-03 12:05:19 -05:00
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	fce48b9b8c	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
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	80702616ea	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
Thomas Harte	7205c3f82b	Made an attempt to build in Oric slow/fast detection.	2016-11-06 21:31:10 -05:00
Thomas Harte	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)	2016-11-06 19:22:09 -05:00
Thomas Harte	353c1c8ea3	Shifted ownership of PETSCII -> string conversion down to the storage layer, where it's useful for tape parsing.	2016-11-06 18:43:51 -05:00
Thomas Harte	1b15bc3a6c	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).	2016-11-06 16:13:13 -05:00
Thomas Harte	827a919368	This is an initial attempt at reading actual tape data. It loses sync though.	2016-11-02 22:30:53 -04:00
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	cbbd31c2e0	Explained what this recently factored-out class does, and removed code from the header.	2016-10-20 19:33:25 -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	a608bbebfb	Performed enough wiring to put the onus back onto OricTAP to do appropriate things.	2016-10-15 21:32:59 -04:00
Thomas Harte	6d7c3f6ac2	Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric.	2016-10-15 21:21:18 -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
Thomas Harte	df01c78039	It's a bit of a mess but this is probably close to appropriate for Oric TAP files.	2016-10-11 07:39:48 -04:00
Thomas Harte	4010f36238	Ensured tape-formatted PRGs reach a conclusion.	2016-09-29 19:12:26 -04:00
Thomas Harte	dbb758aaf1	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.	2016-09-17 22:01:25 -04:00
Thomas Harte	e3571e8b9e	Added insurance against an infinite loop should the tape be exhausted.	2016-09-12 22:22:23 -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	1de6097f06	Shuffled C stuff out on top.	2016-09-08 21:08:03 -04:00
Thomas Harte	24251a2768	Negligible indentation fix.	2016-09-08 07:49:43 -04:00
Thomas Harte	01e5dae512	Threw in 300-baud support. Why not?	2016-09-08 07:48:20 -04:00
Thomas Harte	3e925e80a3	Added a field-filling constructor for pulses.	2016-09-08 07:41:44 -04:00
Thomas Harte	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.	2016-09-08 07:41:26 -04:00