9344 Commits

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Author	SHA1	Message	Date
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	3754cf4bce	Played about with interrupt timing.	2016-02-20 21:24:02 -05:00
Thomas Harte	574985f9a2	Fixed interlaced timing; switched to a more robust detector for horizontal sync; eliminated some test logging.	2016-02-20 20:29:40 -05:00
Thomas Harte	00f414d757	Made an attempt to reintroduce interlacing and screen modes with gaps. Something's wrong with synchronisation though, so most likely I'm outputting a bad signal.	2016-02-20 17:32:51 -05:00
Thomas Harte	68992a62f9	Switched to a subtler to out-of-band syncs.	2016-02-20 00:16:07 -05:00
Thomas Harte	da361be3ee	This might be more accurate? Probably not. Who knows?	2016-02-20 00:13:43 -05:00
Thomas Harte	518c134348	Blank lines are missing (if the double negative can be forgiven) but the framebuffer is otherwise seemingly working well again.	2016-02-20 00:11:23 -05:00
Thomas Harte	a3432120f3	Fixed synchronisation — my two fields weren't of equal length, I wasn't breaking calls to the CRT upon 40/80 transitions, I had the wrong maximum run length. Now I just need to put real pixels back in.	2016-02-19 23:57:57 -05:00
Thomas Harte	1954f7bcbd	Got back to a stable image, at least when staying in a mode. Which is what I was trying to fix. Hmmm.	2016-02-19 23:41:09 -05:00
Thomas Harte	dce1649fc5	Commuted some camelCase variables into more standard C++ underscore names; decided the best fix for the graphics output is to break it down into much simpler chunks. output_pixels is currently a placeholder that simply outputs blank so the current effect is that all data is missing but it should be easy enough now to put pixels back in.	2016-02-18 23:23:49 -05:00
Thomas Harte	570d88a876	Added a simple metric for measuring surprise. Which will hopefully allow me to reimplement PAL/NTSC auto-selection for the Atari 2600.	2016-02-18 23:22:06 -05:00
Thomas Harte	c7f54d649e	Switched back down to two samples per pixel. Though one might do it. Need to investigate.	2016-02-18 23:21:25 -05:00
Thomas Harte	ce3c098c28	Widened beam a little, moved to a linear approximation of age across scans, cut number of stored frames.	2016-02-16 21:48:09 -05:00
Thomas Harte	3ea0d04a1a	-dealloc now blocks until all audio queue buffers are no longer playing.	2016-02-16 21:47:23 -05:00
Thomas Harte	b261e86c62	Reintroduced lateral as a parameter in CRT drawing, to simulate a rounded raster.	2016-02-16 20:37:04 -05:00
Thomas Harte	0b5417ab44	Made an attempt to put interrupts in the correct places regardless of even/odd field.	2016-02-16 20:36:19 -05:00
Thomas Harte	bbffbb5dc2	Resolved deadlock if an invalidate call was sent to the Electron while it was in the middle of an update.	2016-02-16 20:35:45 -05:00
Thomas Harte	a01f90ff3e	Attempted a switch to the real PAL visible area and to something a bit like a real phosphor decay.	2016-02-14 21:57:23 -05:00
Thomas Harte	7580d192d5	Fixes: now setting correct frame time estimate, properly enabling the timestamp attribute, and ensuring that the Electron flushes screen work at least once per host frame update.	2016-02-14 19:28:02 -05:00
Thomas Harte	752db78431	No doubt still imperfect but killed the repeated whole texture uploads.	2016-02-13 23:55:02 -05:00
Thomas Harte	697e50c0cc	Screen output is back, no matter how inefficiently.	2016-02-13 23:50:18 -05:00
Thomas Harte	d0b2d840da	A minor fix to data queuing. Display still absent.	2016-02-13 20:57:41 -05:00
Thomas Harte	7bd237193d	Edged closer towards realistic timing.	2016-02-13 20:52:35 -05:00
Thomas Harte	eeb0e134fd	Started the transition towards a more natural collection of rolling buffers, with phosphor decay in mind.	2016-02-13 20:52:23 -05:00
Thomas Harte	f57d6d350b	Fixed uninitialised error and incorrect default constructor.	2016-02-12 22:35:16 -05:00
Thomas Harte	fd2d5c78f8	Started trying to nudge towards the multistage approach to video decoding.	2016-02-12 22:31:05 -05:00
Thomas Harte	7bc5a43c36	Fixed type warning.	2016-02-12 22:30:22 -05:00
Thomas Harte	0527888b15	Endeavoured to ensure safe shutdown.	2016-02-12 22:30:06 -05:00
Thomas Harte	0a09762be6	Fixed output precision compared to the new approach of trusting the flywheel for position, and eliminated fixed-Acorn constants. Also re-enabled the faded previous frame, at least temporarily.	2016-02-12 19:53:49 -05:00
Thomas Harte	341fafd3c5	Adjusted visible area.	2016-02-12 19:52:04 -05:00
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	c81891ec43	Minor tidying and at least acknowledged the new flywheel encapsulation.	2016-02-11 22:13:38 -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	a6574d1f96	Made an attempt to factor out and more clearly to document my implementation of flywheel synchronisation.	2016-02-11 22:12:12 -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	3a689d14cc	Added padding of supplied data to correct for any potential rounding errors when rendering.	2016-02-07 20:29:32 -05:00
Thomas Harte	3a9ea66f8b	Filled in shader class.	2016-02-07 19:21:22 -05:00
Thomas Harte	4d0a218a57	Certainly at least seriously considering a separate holder for the "compile a shader" logic. Otherwise taking steps back towards PAL/NTSC decoding.	2016-02-07 17:32:38 -05:00
Thomas Harte	602327cd9d	Sketched out a quick class for rendering to texture.	2016-02-07 15:42:02 -05:00
Thomas Harte	2e3ba6bbb2	Removed some logging.	2016-02-07 14:42:40 -05:00
thomasharte	2cb12a7513	Allowed overly aggressive allocations to be cleared up after the fact.	2016-02-06 16:07:23 -05:00
Thomas Harte	d3d505b7bc	That's one header file less.	2016-02-05 23:05:58 -05:00
Thomas Harte	bf348ccb96	Fixed clearing logic.	2016-02-05 22:47:12 -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	80e7e5e602	Updated to return old behaviour of drawing only upon changes.	2016-02-04 23:05:47 -05:00
Thomas Harte	8bc3f8046d	This endeavours to move everything into the CRT class except the final version of shader building.	2016-02-04 22:57:46 -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	09e11469c3	Simplified further: eliminated delegate. Which means I can go frame-free internally to the CRT at some point, if I want.	2016-02-03 19:11:18 -05:00
Thomas Harte	19393390ac	It's broken now, but this is what I now intend the full public interface of the CRT to be.	2016-02-02 22:41:33 -05:00