766 Commits

Author	SHA1	Message	Date
Thomas Harte	e8d34f2eb4	Having farmed out the bus, the Atari itself no longer is/owns a 6502.	2017-03-18 16:34:41 -04:00
Thomas Harte	bb3daaa99b	Sought to reintroduce the Atari 8k paging scheme, at the same time deciding to do away with the copy and paste of holding on to ROM data.	2017-03-18 15:04:01 -04:00
Thomas Harte	36b58d03b7	Formalised read bus value guarantee from the 6502, fixed missing clock signal wiring on the Atari cartridge class, reintroduced CommaVid support.	2017-03-18 14:46:46 -04:00
Thomas Harte	7958459db9	In theory unpaged cartridges should now work. Time to debug.	2017-03-18 14:01:04 -04:00
Thomas Harte	14a76af0d3	Started trying to float out bus control to cartridges.	2017-03-17 20:28:07 -04:00
Thomas Harte	afbd9fd41b	Fixed declared line length.	2017-03-14 21:33:38 -04:00
Thomas Harte	7302703039	Implemented the Activision stack paging scheme.	2017-03-14 20:24:05 -04:00
Thomas Harte	97a8a96593	Rejigged how the memory map is handled and implemented MNetwork support.	2017-03-14 20:07:54 -04:00
Thomas Harte	3b29276228	Implemented the MegaBoy paging scheme.	2017-03-14 17:40:01 -04:00
Thomas Harte	b3632a4e86	Institutes CBS RAM Plus emulation.	2017-03-14 17:25:10 -04:00
Thomas Harte	f0d944847b	Fixed setting of the second 1kb.	2017-03-11 18:16:29 -05:00
Thomas Harte	add14fb43a	Made an attempt to implement Tigervision paging.	2017-03-11 17:44:35 -05:00
Thomas Harte	33bda2d40c	Switched to image inspection for RAM guesses rather than disassembly. Which fixes the other Parker Bros titles.	2017-03-11 13:04:23 -05:00
Thomas Harte	2b5e3a600e	Made a first attempt at implementing the Parker Bros pager within the emulation.	2017-03-11 12:43:12 -05:00
Thomas Harte	9c72ce5bd2	Ensured a settling delay is permitted before an NTSC/PAL decision is made. To avoid false switches just due to startup.	2017-03-06 19:37:35 -05:00
Thomas Harte	79784a8e57	Followed tip: missiles are locked to the position after four output pixels, not four input pixels.	2017-03-04 22:23:50 -05:00
Thomas Harte	4751615623	Fixed NTSC colour cycle count, and hence the 2600's reported line lengths and phase offset.	2017-03-04 17:31:39 -05:00
Thomas Harte	d3257c345a	Tested against public ROMs and corrected. Also moved the deferred adjustment into a more canonical place.	2017-03-04 17:00:28 -05:00
Thomas Harte	837cccdf83	Switched to deferred updates for the 6532.	2017-03-04 14:58:28 -05:00
Thomas Harte	93d1573481	Added a fix for certain homebrews.	2017-03-01 07:59:25 -05:00
Thomas Harte	893a5dd007	Added an artificial low pass filter, attempting to capture post-digital effects.	2017-02-28 21:29:55 -05:00
Thomas Harte	06dd98b23c	Pulled the reset time for horizontal blank extend up to position 224.	2017-02-28 20:28:54 -05:00
Thomas Harte	184c8ae707	Extended to emulate the CommaVid.	2017-02-27 20:50:59 -05:00
Thomas Harte	9d7985c1e1	Added Super Chip emulation.	2017-02-26 17:47:29 -05:00
Thomas Harte	e6a84fd26b	Attempted a hardware-correct implementation of missile-to-player latching. This completes the last of the **knowing** inaccuracies. The rest are as-of-yet unwitting.	2017-02-26 15:12:31 -05:00
Thomas Harte	440467ea3e	Started communicating which copy is being requested.	2017-02-26 13:39:25 -05:00
Thomas Harte	98376de9ad	Started returning 'no effect' for pot ports, rather than doing nothing. Still very much TODO though.	2017-02-25 22:58:58 -05:00
Thomas Harte	e61e355251	Moved to the maximum possibly required queue length of 4. Though the emulated 2600 should never need more than 2 slots as per the current calling pattern, it's not a contractual guarantee.	2017-02-25 17:25:10 -05:00
Thomas Harte	c898c8a99e	Ensured the missiles and ball don't attempt to enqueue. Because I don't think they're supposed to.	2017-02-25 17:13:22 -05:00
Thomas Harte	8c9062857c	Added a single-slot queue for player objects to defer drawing, thereby deferring pixel lookup. Which I think is correct. Though more slots might be needed.	2017-02-25 17:10:24 -05:00
Thomas Harte	77ed4ddc05	Slightly simplified ready line release logic.	2017-02-23 21:08:32 -05:00
Thomas Harte	82f392fada	This should be the other way around. I want whichever is later.	2017-02-22 21:54:49 -05:00
Thomas Harte	8291a63d5f	Fixed loss of audio when switching to PAL.	2017-02-22 21:15:37 -05:00
Thomas Harte	6120dae61a	While I'm using the hacky approach to player/missile synchronisation, I need to seed adder.	2017-02-22 07:39:11 -05:00
Thomas Harte	4f5f191cd6	Fixed: will no longer attempt to output pixels from before the pixel part of a line on which sync was disabled abruptly.	2017-02-22 07:33:36 -05:00
Thomas Harte	21abf4e9fc	Enshrined a terminology switch, albeit without any flow change behind it.	2017-02-22 07:29:48 -05:00
Thomas Harte	144d6b70d9	Minor cleaning.	2017-02-22 07:14:30 -05:00
Thomas Harte	b769f22ca0	Switched back to the collision_buffer_ being part of the TIA object, added one more assert.	2017-02-21 22:26:20 -05:00
Thomas Harte	7019d396d0	Threw in some asserts, discovering a bug in missile positioning.	2017-02-21 22:04:27 -05:00
Thomas Harte	f4447fd9cd	Attempted to fix failure of sprites properly to wrap when performing motion.	2017-02-21 21:53:09 -05:00
Thomas Harte	36396b3d62	Made a slightly better, albeit still inaccurate, version of missile-player lock.Enough for Combat to do reasonable things.	2017-02-21 20:45:20 -05:00
Thomas Harte	d1dbf8c21f	Missile to player lock is supposed to be a toggle; also factored out the commonalities of missile and ball drawing.	2017-02-21 07:58:37 -05:00
Thomas Harte	1bde0fed6f	Simplified relationship between Objects and the usage-specific components through inheritance.	2017-02-21 07:37:20 -05:00
Thomas Harte	7ab2358bba	Made an attempt to reintroduce missiles.	2017-02-20 22:22:39 -05:00
Thomas Harte	99547181f1	Attempted to template this thing. Without yet a plan in place for pixel lookup timing.	2017-02-20 21:42:59 -05:00
Thomas Harte	2bf784535c	Simplified calllng.	2017-02-20 18:04:40 -05:00
Thomas Harte	57f434c199	Reorganised state, with an eye towards unifying object motion and triggers.	2017-02-20 17:58:28 -05:00
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	aff69dbc34	Resolved spurious static analyser issue; screen mode will always be 0–6 but it doesn't know that. Setting a non-zero divider doesn't feel worth worrying about for a cleaner compile.	2017-02-11 13:35:22 -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	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
Thomas Harte	580f347727	Fixed Oric SCART mode by having it change what it's giving to the CRT based on which shader it knows will be active.	2016-12-10 13:55:56 -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	6cdd41e5a9	Added direct use of the colour ROM, uploading 16 bits per pixel to contain the entire ROM composite wave.	2016-12-09 22:17:10 -05:00
Thomas Harte	3b5962b171	This is an initial attempt at using the actual Oric colour ROM values for composite video generation.	2016-12-09 20:01:27 -05:00
Thomas Harte	c304db0f5a	Deintegrated the busy flag and the interrupt request line, as the latter is reset by status reads. Which also means I can start reporting the WD INTRQ line status directly from the Microdisc. That appears to be correct, rather than honouring the Microdisc IRQ select there.	2016-12-06 21:16:29 -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	1b1a8d3e52	Brought the Vic-20 into suffix naming.	2016-12-03 13:30:27 -05:00
Thomas Harte	063a62372f	The Commodore serial bus and C1540 are now postfix underscorers.	2016-12-03 13:14:03 -05:00
Thomas Harte	eb3a1fbfb7	Commuted remaining Electron underscores. It would be nice also to factor out the video, but the time hasn't come yet.	2016-12-03 13:01:01 -05:00
Thomas Harte	4fac538a57	Factored out the Electron's speaker and adjusted instance variable naming.	2016-12-03 12:41:02 -05:00
Thomas Harte	d1d93829cf	Factored out the Tape and switched it to postfix underscores.	2016-12-03 12:18:08 -05:00
Thomas Harte	2003b514aa	Switched the typer to postfix underscores.	2016-12-03 10:55:50 -05:00
Thomas Harte	81ee834530	As well as a bunch of logging, reinstated rotation position preservation across tracks.	2016-12-02 18:36:47 -05:00
Thomas Harte	93c573bfa9	Implemented missing status bits (other than the index hole), and a head loading delay for the Microdisc.	2016-12-01 21:13:16 -05:00
Thomas Harte	442986ee2c	Introduced a head loading path for 1793 machines.	2016-12-01 20:12:22 -05:00
Thomas Harte	82899f2f47	Ensured flag setting is atomic, removed duplication of interrupt request versus busy, found better names for the personality testers, unified delegate protocol.	2016-12-01 07:41:52 -05:00
Thomas Harte	9b6c5e814a	Now that it can be more explicit, this should admit that it's '93-based, not '73.	2016-11-28 16:22:35 -05:00
Thomas Harte	2f459690d4	It would appear the 1770 and 1773 actually differ in relation to the (non-sensical) ability not to spin-up for a Type 2, and whether a side compare can occur. So the WD1770 class now requires a personality to be specified. Which it singly fails to honour.	2016-11-26 23:29:30 +08:00
Thomas Harte	e9d6566e9c	Of course, changing the IRQ enable may immediately change the IRQ line. Signal if so.	2016-11-26 09:35:44 +08:00
Thomas Harte	73d30b9c00	Corrected typo.	2016-11-25 21:30:45 +08:00
Thomas Harte	12956901d6	Filled in some register mirrors.	2016-11-25 21:28:11 +08:00
Thomas Harte	54246c8f1a	Interrupt enabling works the other way around I think, and both registers with only one bit defined should probably return '1' in all other places?	2016-11-25 21:24:59 +08:00
Thomas Harte	8be81f6ebd	Supplied disks are given to the Microdisc.	2016-11-25 20:53:38 +08:00
Thomas Harte	4af678d2ed	Gave the Microdisc a clock signal, added just enough of force interrupt to avoid a spurious belief that a type 3 command has started.	2016-11-25 20:51:39 +08:00
Thomas Harte	5c019ad1c0	Okay, so it looks like both ROM paging flags are the opposite of what I previously had.	2016-11-25 20:42:40 +08:00