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296 Commits

Author SHA1 Message Date
Thomas Harte
99a35266e1 Attempted to bring frequency-switching logic into the cross-platform realm. Which for now creates an issue with the OpenGL context. 2017-02-19 21:20:37 -05:00
Thomas Harte
51bcaea60c Disabled incorrect 'optimisations'. 2017-02-19 12:00:04 -05:00
Thomas Harte
e00339ef0a Attempted to reintroduce the ball. 2017-02-19 08:02:54 -05:00
Thomas Harte
53cd125712 Added stub calls to draw the missiles and ball. 2017-02-19 07:28:24 -05:00
Thomas Harte
04693b067c Fixed failure of the optimised route to pump the pixel clock; removed optimisation entirely for now. 2017-02-18 21:36:48 -05:00
Thomas Harte
cd7876a746 Reintroduced the extra clocking delay. 2017-02-18 20:18:50 -05:00
Thomas Harte
ed5ff49ef5 Fixed vertical delay, retreated from my previous thought about adding the one extra cycle of sprite delay, at least temporarily. 2017-02-16 20:52:01 -05:00
Thomas Harte
8d502a0b03 Decided not to run before I can walk and switched to storing the motion time and next step explicitly per object. 2017-02-16 20:28:37 -05:00
Thomas Harte
5ea232310f Added a check against negative runs. 2017-02-16 18:55:58 -05:00
Thomas Harte
09309aa74f Attempted to prevent extraneous moves. 2017-02-16 18:52:39 -05:00
Thomas Harte
b5357860b9 Made an attempt to split things apart so as to be able to introduce the proper sprite latency. 2017-02-14 20:56:16 -05:00
Thomas Harte
cd90118a0f Added two, extraordinarily simple tests. 2017-02-12 20:32:53 -05:00
Thomas Harte
25776de59d I think unit testing this thing is the only way forwards. Started adding appropriate hooks. 2017-02-12 19:55:02 -05:00
Thomas Harte
600bdc9af7 In C++, I think the implicit cast to bool negates the need for any manual collapsing? 2017-02-12 18:18:35 -05:00
Thomas Harte
0c9be2b09e Shunted the collisions buffer onto a separate area of the heap for the time being, as a debugging aid. Also added a few more initial values. 2017-02-12 18:16:50 -05:00
Thomas Harte
df8a5cbe6d Made attempts (i) to respect the delay flag; and (ii) to account for border-region sprite clocking. 2017-02-12 17:35:09 -05:00
Thomas Harte
9ce68c38ae Made an effort to implement proper pixel output for sprites. 2017-02-12 14:01:50 -05:00
Thomas Harte
40954d6a2a Attempted to factor out parts I expect to reuse for missiles and the ball. 2017-02-12 11:31:17 -05:00
Thomas Harte
ac444a3f34 Corrected both position increments and target time calculation. 2017-02-11 21:24:14 -05:00
Thomas Harte
b8abeced6d Made an attempt to introduce the proper eventful loop for player output. With debugging yet to occur. 2017-02-11 21:01:58 -05:00
Thomas Harte
aeff59addc Implemented motion 'correctly', for programs written to do all work outside of the pixel area. 2017-02-11 20:25:49 -05:00
Thomas Harte
6381e4e1b0 All that's happened to position is that numbers have been added to it. So it can't be negative, given that it wasn't before. So a regular modulo will do. 2017-02-11 13:34:36 -05:00
Thomas Harte
905ed1f87b Switched to the more natural type, which is also signed, making my logic less prone to error. 2017-02-11 13:16:53 -05:00
Thomas Harte
8de6caf6ff Started trying to get into a proper structure here. Chickened out. 2017-02-11 12:59:13 -05:00
Thomas Harte
40d3f5f7f6 Attempted properly to respect start. 2017-02-11 08:26:09 -05:00
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
a549fd1ecc Introduced the ability simply to piggy-back off the CRT's natural phase for the colour burst, thereby eliminating a couple of redundant independent attempts in the Oric and Electron. 2016-12-10 13:42:34 -05:00
Thomas Harte
ebb62a2d78 Switched the 2600 to postfix and non-camel-case instance variable names. 2016-12-03 14:07:38 -05:00
Thomas Harte
b81c058c0a Factored out the Atari 2600's 6532 connection, as a low-hanging fruit. 2016-12-03 13:41:55 -05:00
Thomas Harte
3361d6b93a Factored out the Atari 2600 speaker and adjusted it to postfix underscores. 2016-12-03 13:39:46 -05:00
Thomas Harte
922dd6a586 Hit up the other two kinds of audio generator. 2016-10-07 17:10:00 -04:00
Thomas Harte
ee8510984f Added just enough wiring to restore the 2600 to functionality. 2016-09-15 19:34:45 -04:00
Thomas Harte
d9016909ed Added some wiring for PAL/NTSC mode switching on the Vic, making an attempt to simplify the whole loop of having different clock rates. 2016-08-14 13:33:20 -04:00
Thomas Harte
8db44eed3e Added a default implementation of Speaker::skip_samples. 2016-07-04 20:48:27 -04:00
Thomas Harte
bfa237397d Settled on assigning to nullptr as the appropriate style for emptying shared_ptrs; fixed the Vic properly to release its output resources. 2016-07-04 20:34:11 -04:00
Thomas Harte
88964ceac0 Eliminated plain pointer passing for object types. 2016-07-04 19:33:55 -04:00
Thomas Harte
0182b0483a Added a 'power on' flag that is set automatically at construction but can be declined. Saves all that stuff of every machine having to set and then unset the RST line, and fixes an Electron bug related to that. 2016-06-29 19:13:24 -04:00
Thomas Harte
454e98302d Slight rearrangement plus a setting of the CSMachine delegate corrects audio after a clock rate change. 2016-06-20 22:18:41 -04:00
Thomas Harte
31b26b8118 Made a first attempt to implement the full top-to-bottom change of clock rates, giving the Atari the ability to change rate when it switches to PAL mode, as it should always have been. 2016-06-20 21:47:27 -04:00
Thomas Harte
88e2b382e5 Made an attempt at a full and thorough 6532 implementation (and got a bit more explicit about flag size in the 6502). 2016-06-20 18:57:35 -04:00
Thomas Harte
065ec618c4 Factored out and templated the 6532, finally taking the opportunity to add a means to control the on-console switches of an Atari 2600. 2016-06-19 19:36:34 -04:00
Thomas Harte
65413f078c Factored out the 6532, eventually to make it testable. 2016-06-19 18:57:40 -04:00
Thomas Harte
00a9f1bf24 Fixed best-effort updater actually to run, finally moved clock rate announcement into the C++ side of things, started working on a mechanism to allow clock rate to be updated. 2016-06-16 20:39:46 -04:00
Thomas Harte
12d1cac751 Merge branch 'master' into Vic-20 2016-06-10 18:23:55 -04:00
Thomas Harte
805e2d15c6 Fixed timing when clock is divided. 2016-06-10 18:20:16 -04:00
Thomas Harte
581eace478 Increased logging slightly, ensured all of colour RAM can be read, slightly improved the 2600 pixel decoder. 2016-06-07 22:01:14 -04:00
Thomas Harte
604862b20b Fixed playfield/missile and playfield/ball collisions. 2016-06-02 22:36:52 -04:00
Thomas Harte
e3b95b8d2b Back to asynchronous updates and drawing, to try to improve guarantees on audio latency; experimenting with whether other parts of the approach are fundamentally flawed; added a broad-phase for scheduled updates on the 2600. 2016-06-02 21:22:55 -04:00
Thomas Harte
11073daee1 Issues appear to be around timing generally. Working on it. 2016-06-02 20:15:48 -04:00
Thomas Harte
7aac306a12 Quick fix to the polynomials. 2016-06-02 19:56:02 -04:00
Thomas Harte
253e5a4203 With no regard to performance whatsoever, endeavoured to bring sound to the 2600. It's very scratchy, so something is wrong. 2016-06-02 19:50:16 -04:00
Thomas Harte
1e0fcbbee8 Made a very basic stab at a couple of the tone generators, added straight-through path for the speaker when input rate exactly equals output rate. 2016-06-01 19:53:16 -04:00
Thomas Harte
40c4544fb7 Got the basic sound pipeline pumping, just enough for static-level audio seemingly to work. Berzerk VE says "intruder alert, intruder alert", anyway. 2016-06-01 19:27:04 -04:00
Thomas Harte
8dc66167be Made an attempt to consolidate the Objective-C++ side of things based on the incoming CRTMachine::Machine. 2016-05-31 22:16:20 -04:00
Thomas Harte
5c4f35e13f Finally started on generalising the C++ stuff so as to be able to be able to get a working audio binding on the OS-specific side without further repetition by factoring an appropriate protocol out from the Electron and sketching out the correct speaker class for the Atari. Added a method to ask it what a good output frequency would be. 2016-05-31 21:23:44 -04:00
Thomas Harte
3fc80ea01f Rethought, hopefully perfecting, sprite timing. 2016-05-30 19:56:36 -04:00
Thomas Harte
8b342f77a9 Made an attempt further to rationalise timing. 2016-05-27 21:51:27 -04:00
Thomas Harte
91d3453cc1 Switched to looking backwards rather than forwards. 2016-05-27 14:33:08 -04:00
Thomas Harte
106ddae907 Sprites are still a pixel off but better; made some attempt to move things outside of the loop. 2016-05-25 21:43:19 -04:00
Thomas Harte
40c2c0bd2d Minor simplifications and improvements. Still trying to figure out what's causing the non-linear edge addressing. 2016-05-25 21:12:25 -04:00
Thomas Harte
b01b474e36 I'm back to thinking that resets are deferred but pixel counts are live. 2016-05-25 07:32:25 -04:00
Thomas Harte
758806f924 Introduced a separate queue for pixels, which may or may not be correct. 2016-05-24 21:39:57 -04:00
Thomas Harte
0b081831a9 Set up a pipeline for all pixels that attempts to allow for appropriate delays. 2016-05-24 07:58:26 -04:00
Thomas Harte
5c1e594937 Realised there's a clocking delay on starting horizontal move. Which fixes Coke Zero. 2016-05-22 21:45:40 -04:00
Thomas Harte
c3e719c4ab Added missile-to-player offsetting. Completing the list of graphics-related TODOs. 2016-05-22 17:01:56 -04:00
Thomas Harte
4c6d4d899d Ensured that resetting the horizontal timer affects phase. 2016-05-22 16:29:53 -04:00
Thomas Harte
df93d7849d Re-enabled the ball. 2016-05-22 14:38:14 -04:00
Thomas Harte
0242924fb4 Various bits of caveman debugging appearing and disappearing, switched to latching ball behaviour. 2016-05-22 14:26:02 -04:00
Thomas Harte
5e220562e4 Actually, the four-clock delay, with palette taking effect immediately, appears to be correct. So back to the drawing board on that. 2016-05-21 21:44:54 -04:00
Thomas Harte
4eded9b9d0 Re-enabled collisions. 2016-05-21 13:05:36 -04:00
Thomas Harte
b1c84f5402 Counters run every scan line regardless of blank and sync. Also played further with timing. 2016-05-21 12:54:39 -04:00
Thomas Harte
470c90428a Switched to two-register implementation of VDELP, etc. 2016-05-21 10:26:27 -04:00
Thomas Harte
36d19cb6cf Made an attempt at properly pumping timers during hmove. 2016-05-21 10:18:15 -04:00
Thomas Harte
a952813036 Fixed missile sizes, played about with ball placement. 2016-05-19 18:30:17 -04:00
Thomas Harte
cf5b8ab92e This is now approximately back to where it was on Cosmic Ark. 2016-05-19 08:30:10 -04:00
Thomas Harte
40600b4bcb Made sprite placement consistent at least. Not necessarily yet correct. 2016-05-18 22:07:24 -04:00
Thomas Harte
e61392d3fb Fixed incorrect duplication. 2016-05-18 21:50:28 -04:00
Thomas Harte
8c7ce1ec3f Attempted to fix sprite sizing and, again, missile repetition. 2016-05-18 21:41:25 -04:00
Thomas Harte
d013d46337 Fixed object motion decoding and checking of the repeat mask for missile graphics. 2016-05-18 21:36:28 -04:00
Thomas Harte
83ed6a82cf Fixed: asserting vertical blank doesn't affect underlying timing. 2016-05-18 18:49:40 -04:00
Thomas Harte
877c55b5c5 Threw in missiles. To 'complete' graphics output. Or, rather, to move me on to debugging. 2016-05-18 07:54:44 -04:00
Thomas Harte
354143a78c Reintroduced an attempt to plot sprites. 2016-05-18 07:51:25 -04:00
Thomas Harte
0b99649b0f Had a first shot at triggering player and missile resets. 2016-05-18 07:31:05 -04:00
Thomas Harte
b8708b805c The vertical blank flag now works again. 2016-05-17 22:02:57 -04:00
Thomas Harte
a1e63e8320 Attempted to generalise on pixel counter storage, at least. Further adjusted background timing but I'm still not sure. 2016-05-17 21:41:32 -04:00
Thomas Harte
ad6f405483 Fixed: was off by one on pixels, allowing four extra pixel output cycles per line. 2016-05-17 19:02:32 -04:00
Thomas Harte
c96674b341 Made genuine first approximate attempt at hmove. 2016-05-17 18:35:40 -04:00
Thomas Harte
d170bb14e6 Extended scheduling plans, inserted initial events for hmove, albeit not yet implemented. 2016-05-17 18:21:49 -04:00
Thomas Harte
6a961c4d28 Added something of the ball counter, but without yet a working HMOVE it's prone to error. 2016-05-17 07:18:14 -04:00
Thomas Harte
7d3cf76576 Generalised slightly, to allow events to be queued up to eight cycles in advance; most importantly each event gets to pick its own delay. 2016-05-17 07:09:18 -04:00
Thomas Harte
3d003070b3 Made an attempt better to generalise the idea of things with 4 CLK delays. 2016-05-16 21:54:27 -04:00
Thomas Harte
4ad074fc78 Introduced a four-cycle delay between playfield fetch and display, curing Yar's Revenge. Also disabled barrel roll scanling colouring again. I really need to make my mind up on that. 2016-05-16 19:55:56 -04:00
Thomas Harte
f19ed2e8f8 Started merely attempting to reintroduce the background layer. 2016-05-16 19:04:13 -04:00
Thomas Harte
9d92ad659f Established the basic timing loop, albeit without clocking delays yet. 2016-05-16 08:01:29 -04:00
Thomas Harte
cca53598d3 Made another run at 2600 colours. 2016-05-14 16:52:24 -04:00
Thomas Harte
8d52765f40 Realised why new shaders weren't taking. Very negligibly decreased Atari drawing cost. 2016-05-12 22:22:24 -04:00
Thomas Harte
6d65bc9b3a Permitted a wider error window on vertical sync, tidied things up a little and started trying to move towards full implementation of the OpenGL contract. 2016-05-11 22:11:01 -04:00
Thomas Harte
4b3c4082d2 These functions appear correctly to model the NTSC and PAL palettes; the CRT's attempt to switch function doesn't work properly yet though. 2016-05-11 21:07:18 -04:00
Thomas Harte
1142c86811 Slightly simplified conditional. 2016-05-07 18:38:51 -04:00
Thomas Harte
87df57195d Started on an attempt not to treat the various buffers as free to loop within, starting with the input texture. 2016-05-04 07:39:45 -04:00
Thomas Harte
3af97d4069 Eliminated redundant variable. 2016-04-26 19:57:05 -04:00
Thomas Harte
6c567d166a Fixed colour burst acceptance, switched to an integral single byte streaming of Atari colours. 2016-04-25 20:56:15 -04:00
Thomas Harte
9b64f64db7 Attempted to normalise some style decisions.` 2016-04-24 22:32:24 -04:00
Thomas Harte
7a8d100861 Found a new working formula for NTSC Atari 2600 colours. 2016-04-24 22:02:00 -04:00
Thomas Harte
d221c712b0 Ensured GL context is active when destructing CRTOpenGL. 2016-04-24 20:34:25 -04:00
Thomas Harte
db908a7547 Adjusted Atari to using its non-standard line lengths. 2016-04-24 19:23:30 -04:00
Thomas Harte
9260d97b03 Oh, of course, it's that the output vertex array doesn't get initialised unless there's an RGB shader program. Silly oversight. Fixed. And switched back to TV output for correct colours. 2016-04-24 17:56:36 -04:00
Thomas Harte
d0f9a6c2f5 Added a dump-the-input default RGB output shader. Which at least proves that the Atari 2600 is generally still working. 2016-04-24 17:35:25 -04:00
Thomas Harte
80a3169674 Started reviving the Atari 2600 emulation. Put new startup sequence into place. 2016-04-24 06:56:08 -04:00
Thomas Harte
aa8a192c7e Simplified API down to their being a single texture with a specified depth. 2016-03-19 17:37:55 -04:00
Thomas Harte
c7976dd657 Started trying to clean up my Outputs namespace by moving stuff related to the CRT underneath a separate subnamespace. 2016-03-08 20:49:07 -05:00
Thomas Harte
1e5fe2b2c1 Made an attempt to reestablish the Atari 2600 output connection despite various changes (TODO: generalise that stuff), and to start creating the composite shader. 2016-03-07 21:04:04 -05:00
Thomas Harte
5c8db71c64 Corrected some constants, ensured both machines (so far) are setting the output device. 2016-03-05 16:19:10 -05:00
Thomas Harte
7839d93344 With the provision of an extra hint to the CRT and, finally, the realisation about why my scans weren't exactly joining up, improved output precision. 2016-02-27 22:39:01 -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
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
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
ab45c1d530 Started working on a shell for the Electron emulation, including factoring out the common CRT delegate -> Objective-C bridging, serial dispatch queue and frameskipping logic from the Atari 2600 shell. 2016-01-04 23:12:47 -05:00