593 Commits

Author	SHA1	Message	Date
Thomas Harte	64d5712d1d	Added an incorrectly-coded version of horizontal move, at least so that I can verify that information is going into the correct slots.	2017-02-10 07:23:43 -05:00
Thomas Harte	3b20d862f0	Made an initial attempt to mark sprite positions. But without hmove implemented, they're all over the place.	2017-02-09 20:53:42 -05:00
Thomas Harte	2e9ef2b0ef	Took a shot at reinstating the horizontal blank extend flag.	2017-02-09 18:37:19 -05:00
Thomas Harte	70745286a5	Ensured this array is properly aligned for the uin32_t accesses I intend to make for background drawing.	2017-02-08 20:25:23 -05:00
Thomas Harte	dcb7584060	Added the four-cycle playfield output latency and ensured you can't get smaller-than-usual pixels by rapid register value changing.	2017-02-08 07:30:32 -05:00
Thomas Harte	a477499724	Got a bit more explicit with range returned by get_cycles_until_horizontal_blank and hence attempted a more thorough (/correct) version of WSYNC.	2017-02-07 22:14:45 -05:00
Thomas Harte	944d835eea	Switched explicitly to an accumulation model for filling the collision buffer.	2017-02-06 21:59:28 -05:00
Thomas Harte	8f5039130c	Changed index naming order to ensure no out-of-bounds accesses.	2017-02-06 21:48:41 -05:00
Thomas Harte	ba165bb70a	Made an attempt properly to populate collision registers from the collision buffer.	2017-02-06 21:15:55 -05:00
Thomas Harte	474e2e8d2c	Fixed once again to respect mid-line palette changes.	2017-02-06 20:09:12 -05:00
Thomas Harte	8b8eb787df	Fixed complete invisibility.	2017-02-06 18:42:58 -05:00
Thomas Harte	66bcdd36f3	Made an attempt to introduce an intermediate buffer that ends up with a bit mask of all graphical components present on it, and to use that to infer collision flags and colours, based on playfield priority and colour palette. Immediately yielding: a blank screen. Good work!	2017-02-06 18:29:00 -05:00
Thomas Harte	6bcf95042c	Started trying to be a bit more explicit about usage, and to divide up drawing responsibility.	2017-02-05 17:51:56 -05:00
Thomas Harte	f2437cb257	Added some additional documentation, started making steps towards returning sprites, fixed a counter bug that would exhibit as incorrect sync.	2017-01-31 20:30:32 -05:00
Thomas Harte	abe04334c2	Attempted to retain more player information, and removed the output cursor from class storage as I think it's acceptable as a temporary.	2017-01-30 22:42:27 -05:00
Thomas Harte	8545707b54	Reinstituted the playfield. Probably needs more buffering though. Time to look into delays.	2017-01-30 21:38:58 -05:00
Thomas Harte	2b08758b2b	Started capturing playfield/ball and background colours.	2017-01-30 08:08:03 -05:00
Thomas Harte	764b528891	Made a first attempt at switching to a model that respects blank and sync.	2017-01-30 07:19:19 -05:00
Thomas Harte	92754ace7a	Some mild fixes get me up to having a rolling screen of vertical lines. Which is what I was hoping for right now!	2017-01-29 22:16:23 -05:00
Thomas Harte	d51f185dc7	Made an attempt to reintroduce the basic horizontal loop.	2017-01-29 15:43:57 -05:00
Thomas Harte	2390358c24	Prevented unbounded CPU usage, albeit without yet deciding who has authority for the clock rate.	2017-01-29 14:19:26 -05:00
Thomas Harte	2432a3b4d7	Fixed condition — >= is smarter.	2017-01-29 14:00:01 -05:00
Thomas Harte	9c3597c7e3	Attempted to reintroduce enough logic to handle [most of] line timing, such that WSYNC works. Initial objective is to get back to having a working background.	2017-01-29 13:47:36 -05:00
Thomas Harte	fba6baaa9c	Stubbed and disabled to get back to building.	2017-01-28 21:56:01 -05:00
Thomas Harte	a246530953	Supposing the TIA were implemented, this is (more or less) what the Atari 2600 would now look like.	2017-01-28 21:46:40 -05:00
Thomas Harte	0ffded72a6	Created a placeholder class for a factored-out TIA. There's a bit more it'll need to do, like vending (or receiving) a CRT but this is the full hardware stuff, I think.	2017-01-28 16:19:08 -05:00
Thomas Harte	6d087ca054	Restored 2600 audio.	2017-01-25 21:29:19 -05:00
Thomas Harte	be1cb2a551	Fixed NTSC phase.	2017-01-11 21:31:24 -05:00
Thomas Harte	6153ada33b	Fixed Electron's support for automatically booting floppy disks.	2017-01-08 14:46:19 -05:00
Thomas Harte	8cd1575891	Similar fix to that over in Oric land: ensure a known, effective initial value for the Plus 3's control register.	2016-12-28 18:52:36 -05:00
Thomas Harte	90151e2094	Fixed to ensure a known initial control register value, which has taken effect.	2016-12-28 18:49:32 -05:00
Thomas Harte	a568172758	Made steps towards proper CRC generation. Am currently comparing against Oric disk images, as — amongst other things — they include precomputed CRCs.	2016-12-28 18:29:37 -05:00
Thomas Harte	4fca30b81f	Made the Plus 3 less chatty, documented invalidate_track.	2016-12-25 21:06:58 -05:00
Thomas Harte	3805e3d17d	Ensured base address is set properly at construction.	2016-12-22 22:46:02 -05:00
Thomas Harte	63107cd492	Tidied, very slightly.	2016-12-15 19:49:25 -05:00
Thomas Harte	a555c5762a	Rearranged code, hopefully into a more logical grouping.	2016-12-15 19:47:04 -05:00
Thomas Harte	4a7ddaf2e9	Added documentation and a quick note to self.	2016-12-15 19:43:04 -05:00
Thomas Harte	f61176cd7d	Reinstituted something of the don't-do-pixel-work-until-an-affecting-write-occurs optimisation.	2016-12-15 19:20:14 -05:00
Thomas Harte	c1c70a767a	Attempted fully to reinstate proper timing.	2016-12-15 18:52:16 -05:00
Thomas Harte	0326316bb8	Reinstated whole-frame counting. Thereby to reinstate proper interrupts.	2016-12-15 18:09:49 -05:00
Thomas Harte	b58b11fc93	Switched to a table-based dispatch of line-by-line actions, primarily to simplify.	2016-12-15 18:07:46 -05:00
Thomas Harte	fd541e1142	An early draft; dealing with the issue that not all cycles are necessarily consumed in a single call. Incomplete; broken. Committing for cross-machine visibility.	2016-12-12 08:01:10 -05:00
Thomas Harte	be7e05e109	Started attempting to move total responsibility for display-related interrupts and RAM timing into the video.	2016-12-11 18:34:49 -05:00
Thomas Harte	c5cf8d9531	Ensured the video subsystem correctly handles requests to run over a frame boundary.	2016-12-11 16:17:51 -05:00
Thomas Harte	52028432e1	Restored some semblance of output.	2016-12-10 22:19:10 -05:00
Thomas Harte	0aae1bd1ef	Fixed calculation of termination cycle.	2016-12-10 21:35:41 -05:00
Thomas Harte	c43e481a33	Started factoring video out of the Electron.	2016-12-10 21:07:52 -05:00
Thomas Harte	e62be03673	Removed endianness assumption.	2016-12-10 19:10:33 -05:00
Thomas Harte	a5683dfb21	Removed now untrue comment.	2016-12-10 15:19:48 -05:00
Thomas Harte	0e71802b92	Reduced Oric video to single nibble constants. Removed attempt at asynchronous flush as no longer required.	2016-12-10 14:17:46 -05:00