56 Commits

Author	SHA1	Message	Date
Thomas Harte	1d20a29d97	Made an attempt to switch to the flywheels for both vertical and horizontal sync, and to act more appropriately for out-of-bounds sync requests. Lots of tweaking to do, I fear.	2016-02-11 23:43:08 -05:00
Thomas Harte	86017de1fb	Fixed field timing. It's 312.5 lines now, closer to the PAL standard.	2016-02-11 22:12:37 -05:00
Thomas Harte	c66409421e	Switched to generating an interlaced output, that apparently being correct. Enabled a poor man's version of phosphor persistence to smooth things out a little. It's not completely unconvincing.	2016-02-10 23:11:25 -05:00
Thomas Harte	b5bcadb8d3	Reinstated clipped CRT output, with more appropriate ownership of the decision.	2016-02-07 22:18:55 -05:00
Thomas Harte	2e3ba6bbb2	Removed some logging.	2016-02-07 14:42:40 -05:00
Thomas Harte	6ab425deda	There is now a semi-reasonable amount of screen output again.	2016-02-05 21:35:39 -05:00
Thomas Harte	e0d51408e4	Onward with carrying this through to the bitter end, this at least results in all the appropriate knowledge and call-ins occuring at the CRT.	2016-02-04 22:28:50 -05:00
Thomas Harte	4554abb755	Made an attempt to be more rigorous in display generation on the Electron, to make sure I deal with mid-line changes to/from blank line mode. Even if it turns out that they generate pixels.	2016-01-29 21:14:13 -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	96c946b8af	Made a very basic attempt to emulate tape output.	2016-01-24 18:20:55 -05:00
Thomas Harte	ace331d4b4	Got a bit higher level in CRT timing specification. Which internally allows it now to infer the colour clock frequency. Which will be helpful momentarily.	2016-01-23 18:53:20 -05:00
Thomas Harte	cd97617a8a	Bumped the speaker up to the full namespace, since Tape lives there to avoid delegation complexity. Turned the CRT into something the Electron statically owns, fixing a memory leak by simplifying.	2016-01-23 17:45:06 -05:00
Thomas Harte	f4cd0aa38e	Ensured that all relevant information is given to the tape class. Made an attempt not to write to a screen output buffer if we don't have one. Added some debug printing.	2016-01-23 13:09:56 -05:00
Thomas Harte	949c33774a	Fixed failure to set a delegate, slowed tape speed if operating in RAM.	2016-01-23 11:42:14 -05:00
Thomas Harte	43a7d1b7ae	It'll be helpful to be able to isolate the tape interface when I'm faking a fast load. So factored out.	2016-01-23 00:14:44 -05:00
Thomas Harte	0efe4b312c	Disabled my various bits of rate interchange debugging; improved test for when to call update_display due to a RAM write.	2016-01-21 22:16:52 -05:00
Thomas Harte	82cb1c365c	Further simplified inner loops.	2016-01-21 21:35:04 -05:00
Thomas Harte	34640cec93	Started trying to move some logic out of the inner loop.	2016-01-21 21:28:09 -05:00
Thomas Harte	48ddd3c497	Set about documenting the CRT; while doing so decided to add an optional clock divider for input; having done so decided to try to exploit it with the Electron.	2016-01-21 21:17:47 -05:00
Thomas Harte	de7218cdf0	Added a lot of commenting to the CPU6502 definition, simplifying its construction. Added missing nullability modifier to CSElectron. Fixed bad-habit Objective-C style naming on the Electron's Interrupt enum.	2016-01-20 21:55:38 -05:00
Thomas Harte	4c16d34063	Moved set_tape so that the inline definition of get_next_tape_pulse is visible to it. Also eliminated some dead typedefs.	2016-01-20 08:27:25 -05:00
Thomas Harte	280a2292ff	Shushed.	2016-01-19 23:33:15 -05:00
Thomas Harte	9036cf3b7c	Thus did the first UEF load.	2016-01-19 23:03:27 -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	956b90e203	Attempted further to improve latency; added view adjustment for non-4:3 output aspect ratios. The 4:3 is currently hardcoded, so further work will be required.	2016-01-18 23:55:52 -05:00
Thomas Harte	e63b6d22ae	As shown by the commented-out code, the aliasing-adaptation seems to be working. So something is wrong somewhere else.	2016-01-14 21:59:37 -05:00
Thomas Harte	383b2be4c6	Fixed one off-by-one error.	2016-01-14 21:33:27 -05:00
Thomas Harte	8bd04a6be4	Switched model for filter subclasses. Implemented test square[-ish] wave to check for obvious stream errors. None is clear.	2016-01-14 21:27:02 -05:00
Thomas Harte	38ffcaa262	Here, at last, is _some_ audio output, at least.	2016-01-14 20:33:22 -05:00
Thomas Harte	439d452e23	Resolved some errors.	2016-01-13 22:11:33 -05:00
Thomas Harte	49e89a4bcb	I'm not yet completely convinced by my approach to time basing, but it'll probably do? If so then this more or less gets me ready for a point-sampled filtering.	2016-01-13 22:02:39 -05:00
Thomas Harte	d9a7ef9e46	Edging towards audio output; the speaker is given appropriate input and output rates, and then updated with current divider and enabled/disabled status.	2016-01-13 21:03:43 -05:00
Thomas Harte	d28abdc037	Made an attempt at correct timing, adding support for additional paged ROMs, added file association for .rom.	2016-01-12 22:34:26 -05:00
Thomas Harte	75d6ec354b	Added some very basic filtering in RGB mode.	2016-01-12 16:27:09 -05:00
Thomas Harte	cba09b5490	Switched display update and RAM write order.	2016-01-11 22:29:16 -05:00
Thomas Harte	650077feac	Pulled a few things out as constants, zoomed in a little. Still in a 4:3 window though.	2016-01-11 22:18:34 -05:00
Thomas Harte	72019d0ea3	Made an attempt to get video output correct.	2016-01-11 22:08:30 -05:00
Thomas Harte	e93dbdb463	Implemented keyboard input.	2016-01-11 19:48:31 -05:00
Thomas Harte	ce916ebd6a	Fixed runaway frame generator.	2016-01-10 23:32:57 -05:00
Thomas Harte	ccf20299a3	Made an attempt at getting some interrupts all up inside this thing.	2016-01-10 19:06:46 -05:00
Thomas Harte	cc5ba8243e	Fixed: turned out the power-on bit was being cleared.	2016-01-10 17:17:39 -05:00
Thomas Harte	d95414b2eb	I'm not really sure what's going wrong with paging yet but this fixes the 0xc000 byte error.	2016-01-10 12:30:24 -05:00
Thomas Harte	e07981c147	Fixed screen start address.	2016-01-09 22:52:08 -05:00
Thomas Harte	1308332a71	Hard-coded to 40 columns of black and white, here's some text, at least.	2016-01-09 22:39:46 -05:00
Thomas Harte	037602765a	This now correctly (I think) decodes information posted to the CRT. But doesn't yet post it correctly. I'm very close now, I hope.	2016-01-09 22:19:00 -05:00
Thomas Harte	07a041d788	Fixed vertical retrace sync.	2016-01-09 21:54:31 -05:00
Thomas Harte	3d6f20b7b9	Output, at last! Though sync is clearly way off.	2016-01-09 21:53:33 -05:00
Thomas Harte	b4f31edea3	Made an attempt to get RGB output mode up and running, and showing at least a box where pixels would be.	2016-01-09 21:32:56 -05:00
Thomas Harte	a900bfed65	Fixed to ensure that frame rendering wraps around, and to properly connect the Electron to its view. Now I need a working pixel shader.	2016-01-09 20:34:22 -05:00
Thomas Harte	7341f5c341	This is intended to be enough to start producing something of an output. But something's obviously still broken.	2016-01-09 20:26:40 -05:00