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Author	SHA1	Message	Date
Thomas Harte	a33d31d02a	Fixed to allow loading of ROMs less than 1kb in size.	2015-08-17 00:34:01 -04:00
Thomas Harte	083b678785	Quickie: observed that the initial position is one scanline dirty, not zero. Also switched to a size_t on the write pointer, size_t being the correct C size for into-memory offsets.	2015-08-17 00:25:32 -04:00
Thomas Harte	df68aeff5a	Fixed: made sure that _vBlankExtend resets itself even on non-pixel lines.	2015-08-17 00:09:28 -04:00
Thomas Harte	414849f166	Confirmed: pixel counters are not paused by programmatic vertical blank.	2015-08-16 17:34:20 -04:00
Thomas Harte	cde9bb7ebc	Put common shift step into a macro.	2015-08-16 16:12:20 -04:00
Thomas Harte	a693c081f8	Switched on the appropriate compiler warnings re: signed comparisons and implicit conversions. Fixed all less-than-explicit calls.	2015-08-16 16:08:29 -04:00
Thomas Harte	1cc479affd	Removed redundant GL call.	2015-08-16 15:40:03 -04:00
Thomas Harte	410c09cb35	Made attempt not to touch the _collisions registers (which are instance variables) unless the local variables imply it's potentially necessary. So that's a broad phase on collisions, I guess.	2015-08-16 15:39:40 -04:00
Thomas Harte	40cb1cf60d	... and the ball graphic.	2015-08-16 11:24:33 -04:00
Thomas Harte	afaa86a649	Minor thing: skip the internal counter stuff if we're definitely going to end up with a transparent pixel anyway for the player and missile graphics.	2015-08-16 11:23:46 -04:00
Thomas Harte	4b5aabdd54	Attempted to take even more out of the inner pixel loop.	2015-08-13 23:23:04 +01:00
Thomas Harte	391789e75c	Removed stray space.	2015-08-13 23:22:51 +01:00
Thomas Harte	cbe76ea5d5	Got rid of the thread hopping in order to redraw the GL view. Which appears to help significantly with total application cost.	2015-08-13 22:01:25 +01:00
Thomas Harte	92c7d56cc3	Tiny little speed improvement. Every little helps.	2015-08-13 21:50:24 +01:00
Thomas Harte	17bbe27c9a	As an experiment, performed some very basic moving of playfield composition outside of the pixel loop.	2015-08-13 21:32:22 +01:00
Thomas Harte	033655835a	My understanding now is that object position counting will begin the cycle after the call is made, not that cycle, and that the timer loops just once, with the logic for counter pumping being whether the relevant flag is still set, irregardless of whether the counter is still going.	2015-08-13 18:59:23 +01:00
Thomas Harte	b440fed323	Fixed a couple of incorrect references to horizontal constants or calculations where the intention is to use vertical.	2015-08-13 18:29:07 +01:00
Thomas Harte	323aa27e13	Fixed: paging is based directly on the access, independent of the read/write line (since it isn't actually exposed to catridges).	2015-08-13 15:04:30 +01:00
Thomas Harte	59c872ada6	Attempted to reintroduce suitably noted emergency flyback. To re-enable auto-selection of PAL.	2015-08-13 14:55:53 +01:00
Thomas Harte	9838e01cc1	Made a first attempt at paging.	2015-08-13 13:24:02 +01:00
Thomas Harte	9ca57b80a7	Minor steps to help with diagnostics; all commented out or merely to benefit with breakpoint placement.	2015-08-13 08:43:10 +01:00
Thomas Harte	cc98534f94	Added test for NOP, discovering the undocumented ones to be the incorrect length.	2015-08-13 07:32:50 +01:00
Thomas Harte	6616265d93	Fixed collision tests, added a few more timing tests.	2015-08-13 03:33:45 +01:00
Thomas Harte	dd0f17130a	Found and fixed some timing errors in absolute indexed and in (indirect), y addressing modes: neither is able in write or read-modify-write modes to shave a cycle as then can when reading.	2015-08-13 02:58:39 +01:00
Thomas Harte	975836c30f	Added a quick snippet test, discovering that I've cut a cycle from read/modify/writes.	2015-08-13 02:18:41 +01:00
Thomas Harte	503d684af0	Added a couple of timing tests, both of which seem to pass for now.	2015-08-13 01:55:23 +01:00
Thomas Harte	e8f70398c1	Added one basic timing test, for now: implied nop should be two cycles.	2015-08-13 01:06:56 +01:00
Thomas Harte	d19f8ed507	Removed the implicit reset upon 6502 startup, adding a reset line. Hence all tests now pass again. Added an empty shell for timing tests, the all-RAM 6502 now counting bus cycles.	2015-08-13 00:51:06 +01:00
Thomas Harte	687816d470	Made some attempted simplifications, implemented collisions.	2015-08-13 00:31:57 +01:00
Thomas Harte	aebf636528	Ensured the PIA timer resumes its normal tick rate after being read; fixed those spaces that had crept in where tabs should be.	2015-08-10 16:55:16 +01:00
Thomas Harte	42677f5f83	Fixed association of motion registers and actual registers.	2015-08-10 16:43:45 +01:00
Thomas Harte	0e52b7365e	Removed redundant code.	2015-08-10 16:42:25 +01:00
Thomas Harte	2dde2efff0	Attempted to standardise object counters.	2015-08-10 15:09:40 +01:00
Thomas Harte	a228969655	This should happen every fourth cycle.	2015-08-10 08:16:17 +01:00
Thomas Harte	3c27306a8e	My counter was going the wrong way.	2015-08-10 00:33:37 +01:00
Thomas Harte	a4e52cc4db	Made an attempt to switch to a hardware-accurate object timer model. Without yet perfect success.	2015-08-10 00:20:18 +01:00
Thomas Harte	cd67e31e64	Made a first attempt at switching a little closer to TIA's real internal counter setup.	2015-08-09 22:47:11 +01:00
Thomas Harte	987be65a59	Made a quick attempt at reimplementing skip-to-the-end logic for ready waits.	2015-08-09 02:42:01 -04:00
Thomas Harte	eb23a493e5	Switched back to one texel per colour clock, at least for now. Attempted to break _RGBA assumption within the cathode ray view.	2015-08-05 23:36:04 -04:00
Thomas Harte	fd36f13baf	The cathode ray view no longer hard codes the frame size. So that's one less coupling. Doubled pixel output size to give sufficient sampling detail to capture the NTSC colour clock (ummm, hopefully).	2015-08-05 21:45:47 -04:00
Thomas Harte	67e82c713f	Broke assumption that every item in a vertex description is a short, specifically turning lateral into a byte. Which buys me a byte for phase, if that's sufficient.	2015-08-05 21:12:33 -04:00
Thomas Harte	5644b3a1cc	Fixed scanline sizing and fill issues, as well as shortening vsync to the correct Atari length.	2015-08-05 20:55:27 -04:00
Thomas Harte	265d1d5b24	Merge branch 'EdgeTriggeredVSync'	2015-08-05 20:30:02 -04:00
Thomas Harte	84d1c2e47d	Fixed end of sync time calculation and ensured the pretend capacitor is emptied by the decision to retrace and doesn't refill during retrace.	2015-08-05 20:29:20 -04:00
Thomas Harte	04c2640b15	Made a quick attempt to allow vsync triggers only on the raising edge of a sync signal. Will need to investigate more thoroughly.	2015-08-03 08:42:05 -04:00
Thomas Harte	5313b48ebd	I'm ashamed to admit, I: played with numbers until enough things looked stable such that I can investigate other things. Discovery: my PAL autodetection was way off. Fixed, hopefully.	2015-08-02 20:32:18 -04:00
Thomas Harte	55017b78a5	Made an attempt to unify my variable storage (and, technically, to get beam size correct across the frame).	2015-08-02 19:30:45 -04:00
Thomas Harte	6e52e5df1c	Full separate 'lateral' usage is go. Also probably at some point I need to throw in a phase property, which this new flexibility will help with.	2015-08-02 14:32:29 -04:00
Thomas Harte	3ab6585789	Started making the format of data included in a CRTFrame less a matter of variously hard-coded magic constants. Which will allow me to separate the idea of an internal lateral position from the direct texture coordinate, avoiding precision sampling errors at the top and bottom.	2015-08-02 14:25:21 -04:00
Thomas Harte	be421587ad	Eliminated the vertical retrace counter; vertical retrace ends when the beam gets back to the top.	2015-08-02 13:48:35 -04:00