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Author	SHA1	Message	Date
Thomas Harte	06ea81fdb2	Made sure that unrecognised waves don't block the symbol queue, and allowed any type of nonsense to be skipped before finding a byte.	2017-07-21 20:23:26 -04:00
Thomas Harte	d69b1e2d11	Switched parsing logic to looking only for upward zero crossings, that being my new understanding of the ROM.	2017-07-21 19:39:38 -04:00
Thomas Harte	a3e0024980	Chopped time accumulation out of the default Tape process because it's proving to be sufficiently expensive for a TZX as not to be worthwhile. Introduced a cheaper position capturing/restoring method.	2017-07-21 18:55:03 -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	e152ed2e61	Made an attempt to avoid GCD costs when accumulating Times with a common clock rate (/divisor).	2017-07-21 18:20:27 -04:00
Thomas Harte	9e975a46a2	Mildly simplified syntax.	2017-07-21 18:18:45 -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	44e5a03cf2	Removed just-don't-power-the-tape approach to pausing and playing, in favour of being fully communicative.	2017-07-19 19:21:27 -04:00
Thomas Harte	c8cee88e33	Ensured that a stopped tape outputs a false level and took an extra safety check in instantiation.	2017-07-18 22:49:11 -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	130d598ec9	Corrected some minor out-of-style breaks, and ensured that the name of ZX81 files is returned.	2017-07-17 19:52:54 -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	5d44422230	Merge pull request #152 from TomHarte/CSWLength ... Corrects a false assumption about decompressed CSW size	2017-07-17 19:06:43 -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	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	7b5f93510b	Fixed the DigitalPhaseLockedLoopBridge bridge, once again fixing tests.	2017-07-16 20:55:57 -04:00
Thomas Harte	b3861ff755	Reduced copying of Pulses.	2017-07-16 19:49:31 -04:00
Thomas Harte	5a6b7219b9	Merge pull request #150 from TomHarte/PLLParsing ... Introduces PLL-driven tape parsing of Acorn tapes	2017-07-16 19:28:51 -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	8ddd686049	Removed redundant variable.	2017-07-16 19:04:03 -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	ba83dfd454	Merge branch 'master' into PLLParsing	2017-07-16 17:01:00 -04:00
Thomas Harte	2fb0aea990	Updated the C1540 test vessel to the new world.	2017-07-16 17:00:39 -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	004d6da9fb	Merge branch 'master' into PLLParsing	2017-07-16 15:03:13 -04:00
Thomas Harte	561373e793	Merge pull request #149 from TomHarte/BetterVectors ... Corrects some long-standing unnecessarily convoluted ways to handle semi-dynamic arrays	2017-07-16 15:02:52 -04:00
Thomas Harte	279f4760d7	Eliminated buffer_size_ as something explicitly stored, and reduced size of delegate call out.	2017-07-16 15:01:39 -04:00
Thomas Harte	f931cd582d	Switched to use of std::vector in those few remaining places where I was still using a unique_ptr to a native type and newing for myself. So, some of my earliest bits of code.	2017-07-16 13:54:07 -04:00
Thomas Harte	ab51bc443b	Eliminated foolish double indirection on phase history.	2017-07-16 13:39:41 -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	6ca712b498	Merge pull request #148 from TomHarte/CSW ... Adds support for the CSW file format	2017-07-15 15:33:05 -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	481487f084	Oh yuck, it looks like I've repeated this same test in two different places. Must figure out where to factor it out to. But in the meantime, the emulated Electron has just loaded its first CSW.	2017-07-13 22:39:30 -04:00
Thomas Harte	fc8313430a	Added an early exit if what was read as a header turns out pretty much certainly not to be a header.	2017-07-13 21:26:45 -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