308 Commits

Author	SHA1	Message	Date
Thomas Harte	2179edc7fe	Adjusted to allow the very first thing found to be data, and ensured that unrecognised symbols break files just as gaps do.	2017-07-17 07:43:47 -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	b3861ff755	Reduced copying of Pulses.	2017-07-16 19:49:31 -04:00
Thomas Harte	c2bc34fd87	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.	2017-07-16 19:25:26 -04:00
Thomas Harte	1d3ae31755	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.	2017-07-16 19:24:01 -04:00
Thomas Harte	e5188a60dc	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.	2017-07-16 19:03:50 -04:00
Thomas Harte	e71d13c090	With the new PLL implementation, switching to a deeper window size returns the Acorn tape parser to: working.	2017-07-16 17:12:12 -04:00
Thomas Harte	51177e4e1f	Attempted a different implementation of the PLL, that responds to changes only once.	2017-07-16 16:49:04 -04:00
Thomas Harte	c8575fe6e0	Mild clean ups, and a tweak to permitted top and bottom phase.	2017-07-16 13:39:08 -04:00
Thomas Harte	4489f120f9	Eliminated foolish double indirection on phase history.	2017-07-15 22:40:38 -04:00
Thomas Harte	253f9603ed	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.	2017-07-15 19:07:35 -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	648618d280	Tweaked bit timing decision.	2017-07-13 21:26:05 -04:00
Thomas Harte	ae1a130843	Fixed: length of 0 is a special case.	2017-07-13 20:57:27 -04:00
Thomas Harte	33d16ae0cd	Fixes: individual static analysers reset tapes, for potential successors. The ZX81 file analyser no longer overruns its buffer upon receiving a file that is shorter than 11 bytes.	2017-07-12 21:34:08 -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	d853841dd5	Further lightened up my file-is-ZX81 check.	2017-07-10 20:44:13 -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	2f42874fd3	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.	2017-07-06 22:33:03 -04:00
Thomas Harte	84d0e9b4cd	Accept a pulse that begins exactly on seek_time as being found while seeking.	2017-07-06 22:31:45 -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	919fc48cc5	Fixed dumb out-of-bounds access error.	2017-06-22 22:28:50 -04:00
Thomas Harte	87ee8450fe	Minor rejig: it's much more likely that something that can't be distinguished is a ZX81 program. TODO: some sort of BASIC token parsing, to be more confident.	2017-06-22 20:23:14 -04:00
Thomas Harte	52d9ddf9e5	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.	2017-06-21 22:13:24 -04:00
Thomas Harte	e6e6e4e62b	Adds an extra character for padding the ZX81 table.	2017-06-12 22:08:11 -04:00
Thomas Harte	626737b9fa	Started mucking about with some string conversion routines. Not finished yet.	2017-06-12 21:32:36 -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	2c6414ce11	Adjusted to allow inspect_waves to swallow a gap before a bit if necessary, increasing the opportunities for its call.	2017-06-11 18:31:09 -04:00
Thomas Harte	e5aea632ee	Updated curly bracket placement.	2017-06-11 17:29:22 -04:00
Thomas Harte	c2bc9a8c62	Ensured no namespace collision in double-include guards.	2017-06-11 16:41:15 -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	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	c775db50ef	Ensured no out-of-bounds accesses.	2017-06-08 21:31:03 -04:00
Thomas Harte	ee4c8b5ad2	Ensured final byte plays out.	2017-06-08 19:51:49 -04:00
Thomas Harte	d8b76e31c3	Added and improved the is-this-ZX80-stuff test. It seems some bytes are going missing in the to->from tape conversion.	2017-06-08 19:49:18 -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