313 Commits

Author	SHA1	Message	Date
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	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	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