243 Commits

Author	SHA1	Message	Date
Thomas Harte	6532b3a8c8	Filled in a calculation of clocks per bit that'll do.	2016-07-29 07:51:07 -04:00
Thomas Harte	f984de42a3	Took some small steps towards having a disk drive that at least can select a track and pump relevant events into a PLL.	2016-07-29 07:31:02 -04:00
Thomas Harte	0e581c7607	Factored out the stuff of running a timed event loop from the TapePlayer.	2016-07-29 07:15:46 -04:00
Thomas Harte	e55db0cfe8	Made an attempt to eliminate creeping tape processing accuracy misses, which implied factoring out the GCM and LCD functions, which I then felt didn't really amount to signal processing.	2016-07-29 05:19:01 -04:00
Thomas Harte	5c1614ce7b	Attempted to simplify, very slightly.	2016-07-28 14:35:39 -04:00
Thomas Harte	015cea494d	Switched to a much-more straightforward PLL. I think I'm just fiddling now rather than moving forwards. Probably time to move on?	2016-07-28 11:32:14 -04:00
Thomas Harte	e061e849d4	Had a second bash at the PLL. Probably I should read some of the literature.	2016-07-27 16:24:24 -04:00
Thomas Harte	63f39608a6	Added just enough to get back to a working build.	2016-07-15 20:35:19 -04:00
Thomas Harte	165dbd9651	Started fleshing this out a bit. Hopefully.	2016-07-15 08:28:34 -04:00
Thomas Harte	0aa90b943b	Switched to specifying bit length as a quotient for the purposes of a PCMSegment and verified that I had the logic for picking a Commodore time zone backwards: bigger numbers are faster, not slower. ... Started sketching out a DiskDrive class.	2016-07-15 06:51:11 -04:00
Thomas Harte	6afd619791	Eliminated floating point arithmetic.	2016-07-14 19:47:00 -04:00
Thomas Harte	6b4fec37ff	Moved down to a single divide.	2016-07-14 19:45:08 -04:00
Thomas Harte	481475a0f4	Switched to a full-on linear regression. Which causes the current tests to pass.	2016-07-14 19:42:01 -04:00
Thomas Harte	6d6b26b99f	Actually made things worse.	2016-07-14 07:32:27 -04:00
Thomas Harte	d8d3464c56	Made a quick-hack attempt at PLL synchronisation. Which doesn't work.	2016-07-14 07:31:23 -04:00
Thomas Harte	d1fe07f14d	Added test of perfect DPLL input timing.	2016-07-12 21:42:23 -04:00
Thomas Harte	94db45456e	Started sketching out the basic form here, albeit that it doesn't yet do _the only thing it advertises itself as useful for_.	2016-07-12 20:23:56 -04:00
Thomas Harte	75d95c0bc0	Sketched out an interface for a digial PLL. Not persuaded yet. Baby steps.	2016-07-11 22:12:58 -04:00
Thomas Harte	1e9eedc314	Factored out the PCM track since it's going to be a useful construct for almost every file format. Documented it a little better.	2016-07-10 18:36:52 -04:00
Thomas Harte	66895d3ac7	Actually, I think this is the correct conversion from received speed to clock rate. It'll become obvious if it's not when I get back to working on the 1541 itself.	2016-07-10 18:24:12 -04:00
Thomas Harte	19ee430d4a	Made an effort to support zoned tracks, at least.	2016-07-10 18:07:53 -04:00
Thomas Harte	6593caca93	Switched to a probably more helpful way around of expecting bits in bytes.	2016-07-10 16:21:52 -04:00
Thomas Harte	845a00ccef	Attempted via linear search to implement PCMTrack::get_next_event.	2016-07-10 16:17:25 -04:00
Thomas Harte	f9510c1b67	Put sufficiently much of PCMTrack into place to get to a stored list of segments, having determined a common clock rate between them and therefore a complete track length.	2016-07-10 16:10:05 -04:00
Thomas Harte	4ae9f5ad5d	Added preliminaries of reading the speed zone information.	2016-07-10 13:42:45 -04:00
Thomas Harte	8ae78ba4e0	Fixed signature check and fseek parameter order.	2016-07-10 13:32:59 -04:00
Thomas Harte	ff49857f5c	Started sketching out support for the G64 file format.	2016-07-10 10:17:53 -04:00
Thomas Harte	9e3d6b762b	Sketched out the generic interface for a disk, documenting it and the tape interface while I'm here.	2016-07-10 08:54:39 -04:00
Thomas Harte	c306d705e1	Made a quick first attempt at all-the-way-through tape wiring for the Vic.	2016-06-26 19:43:09 -04:00
Thomas Harte	37ba42a52f	Factored out the stuff of playing a tape, started basic sketch of the Vic-related classes.	2016-06-26 19:03:57 -04:00
Thomas Harte	ee19417ded	Made an attempt quickly to implement parsing of the Commodore .TAP file format.	2016-06-25 16:09:32 -04:00
Thomas Harte	21ca1ef86b	Started attempting to clarify instance variable usage.	2016-03-12 23:19:10 -05:00
Thomas Harte	2b8fb5b615	Made an attempt to fix my 0114 implementation.	2016-02-20 23:13:58 -05:00
Thomas Harte	f7fc7cb932	Implemented some portion of 0114; ensured I'm safely skipping chunks in all cases.	2016-02-20 22:18:00 -05:00
Thomas Harte	ec3cccbb0d	Working towards HQ UEF support: fixed bug whereby writing to tape output would reset input pulse stepper; added support for chunk 0116 and approximate support for 0113.	2016-02-20 22:03:14 -05:00
Thomas Harte	2e3ba6bbb2	Removed some logging.	2016-02-07 14:42:40 -05:00
Thomas Harte	adc6838ba0	Continued slow migration of shader ownership to CRT. Attempted to start debugging the tape interface.	2016-01-27 21:35:57 -05:00
Thomas Harte	e65cd4cf06	Some data is marginally reaching the CPU from the tape.	2016-01-19 22:05:34 -05:00
Thomas Harte	832797182f	Update TapeUEF.cpp ... Corrected chunk for which _tone_length is used, definition of a carrier tone chunk.	2016-01-19 18:59:10 -05:00
Thomas Harte	127684c590	With silence and high tone implemented, this may well hit a large proportion of existing files.	2016-01-18 19:45:14 -06:00
Thomas Harte	7d6214e078	This likely gets chunks 0100 and 0102 correct.	2016-01-18 19:37:36 -06:00
Thomas Harte	5a39e42413	Wired up enough such that some basic attempt at parsing a UEF occurs.`	2016-01-18 17:06:09 -06:00
Thomas Harte	2779f0e569	Statred working on support for at least the most fundamental file format.	2016-01-18 15:46:41 -06:00