1324 Commits

Author	SHA1	Message	Date
Thomas Harte	63e0802f4e	Ensured tape input appears on the returned value.	2017-06-06 18:16:27 -04:00
Thomas Harte	e3ee9604a5	Added comments.	2017-06-06 18:01:33 -04:00
Thomas Harte	8c66e1d99d	Factored out ZX80/81 video and rejigged to ensure it will keep ticking over irrespective of whether the machine is supplying data.	2017-06-06 17:53:23 -04:00
Thomas Harte	ca9e8aecd6	Made a seemingly unsuccessful attempt to add tape input.	2017-06-06 10:13:32 -04:00
Thomas Harte	cc4cb45e9d	Implemented keyboard input and ensured that the signal generated is marked as composite, putting the colour-suppression ball into the CRT's court.	2017-06-06 09:25:18 -04:00
Thomas Harte	ebbf6e6133	Surprisingly, I think this may actually be the correct output: stopped throwing away the I part of the refresh register and flipped black and white.	2017-06-06 09:03:09 -04:00
Thomas Harte	cba07dec7e	Doubled up to display all eight pixels. To confirm that they are the wrong pixels.	2017-06-06 08:59:00 -04:00
Thomas Harte	6f7037b2b1	Made an initial stab at outputting half the correct pixels.	2017-06-06 08:55:07 -04:00
Thomas Harte	ef4b2f963d	Probably more-or-less corrected. But this is all a bit too interdependent.	2017-06-05 23:52:56 -04:00
Thomas Harte	97f3ff03b6	Restored white background and attempted to correct output timing deficiencies. Incomplete success.	2017-06-05 23:50:04 -04:00
Thomas Harte	2fbc7a2869	Made a very basic attempt at getting something that at least demarcates proper graphics output.	2017-06-05 23:32:49 -04:00
Thomas Harte	4983718df7	Got to outputting something to the CRT. Should be just proper syncs and a paper background. It's not synchronising properly, so something is amiss in my timing.	2017-06-05 10:47:42 -04:00
Thomas Harte	23ca00fd9a	Added memory fuzzing as a way to verify state being written by the Z80. Eventually discovered the HALT problem as fixed in the last commit, so have stripped away the caveman stuff again.	2017-06-05 10:36:07 -04:00
Thomas Harte	893f61b490	Attempted specifically to reproduce the 1kb ZX80 memory map in the hope of getting compact lines and in case mirroring is why I'm getting completely empty video reads. Still no action.	2017-06-05 09:38:49 -04:00
Thomas Harte	7e3a46c33e	[Re]discovered that sync may also be a product of the interrupt cycle. So started looking into that.	2017-06-04 21:54:55 -04:00
Thomas Harte	73654d51dd	Wired up actually to run.	2017-06-04 18:37:13 -04:00
Thomas Harte	096551ab3e	Made a first attempt to hash out the ZX80's bus. Video output isn't yet going though. Can't seem to find clarity on whether horizontal sync is really programmatic. Let's see.	2017-06-04 18:32:23 -04:00
Thomas Harte	c485c460f7	Imported the ZX80 and 81 system ROMs (though not publicly), added enough code to post their contents into C++ world.	2017-06-04 18:08:35 -04:00
Thomas Harte	d2637123c4	Added necessary support to get as far as an empty window when attempting to load a piece of ZX80 software.	2017-06-04 17:55:19 -04:00
Thomas Harte	2562306802	Merge branch 'master' into Z80	2017-05-16 21:05:00 -04:00
Thomas Harte	2ee8a7056e	Corrected TIA no longer to assume phase is an automatic quarter askew.	2017-05-16 20:43:28 -04:00
Thomas Harte	a5075d9eb5	Formalised the reasoning behind the colour phase fix-up and made it an opt-in per-caller value. Only the Oric currently needs to opt in.	2017-05-16 20:31:39 -04:00
Thomas Harte	eb8a2de5d6	Settled definitively on flush as more communicative than synchronise (and slightly more locale neutral); culled some more duplication from the Z80.	2017-05-15 07:38:59 -04:00
Thomas Harte	0808e9b6fb	Pulled the 6502 into a CPU namespace, making it an instance of something that has micro-opcodes and schedules them, and factoring out the formulation of a register pair.	2017-05-14 22:08:15 -04:00
Thomas Harte	8e35e913bb	Formally withdrew the 'load automatically' option for the Vic, having removed that option elsewhere.	2017-05-14 16:59:24 -04:00
Thomas Harte	5d91a2600d	Permitted ROM-style PRGs that are not a power-of-two in size, and added extra safety checks on loading data from a tape.	2017-05-08 22:15:35 -04:00
Thomas Harte	cb66c7e2dc	Performed some minor tidying.	2017-05-08 21:05:35 -04:00
Thomas Harte	61f8f2f18c	Switched to a more straightforward way of exiting from tape data loading.	2017-05-08 20:58:55 -04:00
Thomas Harte	7b43ae0a92	Implemented a catch for loading the data portion of files.	2017-05-07 22:22:59 -04:00
Thomas Harte	2807e3134f	Implemented speedy header finding. So that's half of it.	2017-05-07 20:32:48 -04:00
Thomas Harte	0771363f3b	Removed one piece of unnecessary logging.	2017-05-06 22:22:03 -04:00
Thomas Harte	2edf73908c	Temporarily disabled the existing fast loading implementation in pursuit of another, and started trying to correct the lack of connection between the userport VIA and the tape drive.	2017-05-06 22:00:12 -04:00
Thomas Harte	ed6b135015	Made final switch to permit high-sampling rate Atari audio.	2017-04-15 21:18:00 -04:00
Thomas Harte	f95015c7f6	Pulled out the divisor for audio.	2017-04-03 21:16:39 -04:00
Thomas Harte	814c0ada13	Fixed action counts for border motion.	2017-03-26 18:33:05 -04:00
Thomas Harte	dfc468f220	Locked down all initial state.	2017-03-26 15:47:04 -04:00
Thomas Harte	e01f3f06c8	Completed curly bracket movement.	2017-03-26 14:34:47 -04:00
Thomas Harte	3229502fa1	Standardised curly bracket placement across the Atari.	2017-03-23 21:59:16 -04:00
Thomas Harte	a26b87f348	Fixed: mistake was failure to count ready cycles.	2017-03-20 20:44:03 -04:00
Thomas Harte	4c3cc42c91	This gives a very noisy version of the real audio.	2017-03-20 20:38:29 -04:00
Thomas Harte	f3f4e1a541	Made a first, hacky, attempt at audio.	2017-03-20 19:35:51 -04:00
Thomas Harte	4722f6b5c4	Fixed sprite disappearance: test should be applied predecrement, not post — it relates to the address being used this access, not the next one.	2017-03-19 18:58:35 -04:00
Thomas Harte	7d8d1c7828	Fixed 'random' number generator.	2017-03-19 18:54:35 -04:00
Thomas Harte	4bb70e7d31	Resetting the mask upon low byte write appears to resolve some issues.	2017-03-19 18:49:37 -04:00
Thomas Harte	321030bb44	Added a slightly faulty but seemingly 'close' version of masking.	2017-03-19 18:28:06 -04:00
Thomas Harte	6c161b1150	This gives something that might be the correct background.	2017-03-19 17:49:48 -04:00
Thomas Harte	d5c37c8619	Shushed a little, so as to be able to see a reasonable amount of output during my lifetime.	2017-03-19 17:38:54 -04:00
Thomas Harte	7c66c36d3f	Attempted at least to manage appropriate data storage.	2017-03-19 17:31:08 -04:00
Thomas Harte	031a68000a	Added a class to contain the Pitfall 2 pager and a skeleton of initial work.	2017-03-18 22:08:47 -04:00
Thomas Harte	c3d82f88a5	Tidied up and commented on the Activision stack implementation.	2017-03-18 21:01:58 -04:00
Thomas Harte	c033bad0b9	Here's MNetwork!	2017-03-18 20:51:49 -04:00
Thomas Harte	c31d85f820	Re-emplaced the MegaBoy. Also cut detritus from the main Atari header.	2017-03-18 19:02:34 -04:00
Thomas Harte	217fbf257e	CBS RAM Plus returns.	2017-03-18 18:56:20 -04:00
Thomas Harte	0b611a14b9	Tigervision paging returns.	2017-03-18 18:50:13 -04:00
Thomas Harte	df6861c9dc	Parker Bros paging is back.	2017-03-18 18:21:01 -04:00
Thomas Harte	a4cd12394e	Reinstated the Activision stack pager.	2017-03-18 18:03:48 -04:00
Thomas Harte	e0bca1e37b	Reinstated the 16 and 32 kb Atari pagers, and ensured the 6532 always starts in a valid state.	2017-03-18 17:34:34 -04:00
Thomas Harte	55ce851bb2	Fixed types of the 8k cartridges, ensured the 6502 starts without an IRQ request history.	2017-03-18 17:04:01 -04:00
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
Thomas Harte	5be45c6c50	Ensured proper default behaviour.	2016-11-25 20:30:27 +08:00
Thomas Harte	d33f3b9224	This is the broad strokes effort at enabling Microdisc emulation.	2016-11-25 20:15:48 +08:00
Thomas Harte	7c2d9f3752	This seems to be right, per http://wiki.defence-force.org/doku.php?id=oric:hardware:floppy_disk_controller_wd1793	2016-11-22 22:35:43 +08:00
Thomas Harte	5ebc1c63ff	Switched video to postfix underscores, for consistency.	2016-11-22 22:28:45 +08:00
Thomas Harte	707763f80b	Added Microdisc storage to the Oric class, switching all instance storage to postfix underscore while I'm here.	2016-11-22 22:22:00 +08:00
Thomas Harte	0c3644f350	Made a second parse at logic. We'll see.	2016-11-22 22:12:32 +08:00
Thomas Harte	03843bf934	Unified delegates. Let's keep it easy for the caller.	2016-11-22 22:11:11 +08:00
Thomas Harte	13a608a8c2	Added what may be correct paging logic.	2016-11-22 22:09:52 +08:00
Thomas Harte	363db695e8	Started implementation of the Microdisc selection logic.	2016-11-22 08:12:53 +08:00
Thomas Harte	09f965e6a9	Fixed potential bug whereby inserting a disk into a drive that hadn't been lazily allocated yet but had already been selected wouldn't take effect.	2016-11-22 08:11:57 +08:00
Thomas Harte	ea33a28695	Any Oric-format disks that are inserted now make it all the way to the Oric, along with a request to emulate the Microdisc. It has received a copy of the ROM. The ball is entirely in its court now.	2016-11-21 20:59:25 +08:00
Thomas Harte	311f8c0b47	Restored audio.	2016-11-16 11:10:07 +08:00
Thomas Harte	8b40ae03ca	Extended analysis to spot IRQ and NMI vector changes, for titles that simply adjust those then exit. Ensured Oric emulator can type and load quickly on an Oric 1 just as well as on an Atmos.	2016-11-15 11:05:53 +08:00
Thomas Harte	e2cdfae8a7	The emulated Oric now has access to both versions of the BASIC ROM and picks between them based on the static analyser's recommendation.	2016-11-15 10:39:16 +08:00
Thomas Harte	9c550c594a	Moved audio work back into its own thread, but this time it queues up an all happens only upon a flush. Hopefully to resolve synchronisation cost concerns.	2016-11-09 21:17:50 -05:00
Thomas Harte	64827931bf	Switched the Oric implementation simply to rely upon the Storage-level tape parser. So now there's only one, authoritative one of those.	2016-11-07 21:57:58 -05:00
Thomas Harte	45b169f341	Made a few mapping fixes, clarified where the default reset code lives, ensured the Oric and Vic clear their keys when the typer ends.	2016-11-05 15:28:03 -04:00
Thomas Harte	338904fffe	Made similar cleanings of the Electron and Vic.	2016-11-05 15:07:57 -04:00
Thomas Harte	9fb9d92437	Made the typer much more able to help out, and thereby tidied and separated the Oric's typer.	2016-11-05 14:47:09 -04:00
Thomas Harte	626e719fab	Added sanity checks on loading quickly.	2016-11-03 22:50:49 -04:00
Thomas Harte	a7e4c0c3b5	Switched to a ROM trap for typing.	2016-11-03 22:21:05 -04:00
Thomas Harte	8c70dc5891	Implemented typer for the Oric, and I'm starting to think the code is a bit too repetitious. Refactoring will be forthcoming. Added CLOAD"" as the loading command for all Oric software.	2016-11-03 22:14:40 -04:00
Thomas Harte	9c2df231ce	Made fast loading optional.	2016-11-03 07:59:30 -04:00
Thomas Harte	e9f1a6a79d	This appears to be it. The secret? Don't worry about the stop bits. They're just processing time. Latch onto the next start.	2016-11-03 07:34:48 -04:00
Thomas Harte	827a919368	This is an initial attempt at reading actual tape data. It loses sync though.	2016-11-02 22:30:53 -04:00
Thomas Harte	419629ee6e	Completed proof of theory for fast loading. It's just an around-the-back direct-to-file hack for now though.	2016-11-02 21:09:49 -04:00
Thomas Harte	bb58caff52	Merge branch 'master' into FastOricTape	2016-10-31 22:11:03 -04:00
Thomas Harte	21604376e6	Reintroduced clocking of the AY and boxed in the range of the master divider a little further.	2016-10-30 22:51:08 -04:00
Thomas Harte	33512988fb	Added a basic cycle skipper plus some notes.	2016-10-30 22:39:47 -04:00
Thomas Harte	b04ba41951	Moved code out of header.	2016-10-30 20:16:58 -04:00
Thomas Harte	3b52ab0d37	Cut some dead state.	2016-10-30 20:16:52 -04:00
Thomas Harte	58f888c6ad	Limited CRT calls.	2016-10-30 16:21:20 -04:00
Thomas Harte	1ff9b474bf	Made an attempt to make execution flow through this loop more straightforward for a branch predictor.	2016-10-30 15:30:39 -04:00
Thomas Harte	7843a244b0	Ensured emulation doesn't enter an infinite loop if the user attempts to read beyond the end of a tape.	2016-10-28 22:23:25 -04:00
Thomas Harte	4fab794747	Added a direct-to-two-cycles emulation path for 6522 owners.	2016-10-27 21:13:25 -04:00
Thomas Harte	2eda0b3c86	Attempted to simplify the logic behind the most common 6522 usage.	2016-10-27 21:06:31 -04:00
Thomas Harte	30d4a7c662	Fixed: blinking means ink vanishing and appearing. Nothing else.	2016-10-24 21:58:15 -04:00
Thomas Harte	09687a2e2f	Removed errant newline.	2016-10-20 21:30:12 -04:00
Thomas Harte	44910d90ba	Adjusted aberrations in semicolons.	2016-10-20 21:20:13 -04:00
Thomas Harte	6292ac5b26	Yet more .hpp clean(s)ing.	2016-10-20 21:15:21 -04:00
Thomas Harte	c5948ef177	Evicted more header-resident code.	2016-10-20 21:05:32 -04:00
Thomas Harte	d335991e60	Shifted code out of the header.	2016-10-20 20:53:17 -04:00
Thomas Harte	9c956f83b8	Made it slightly more clear that the correct test is conformed to.	2016-10-20 19:23:36 -04:00
Thomas Harte	21cfb39ed9	Added 60Hz output support.	2016-10-20 07:34:23 -04:00
Thomas Harte	5c69728625	Introduced a memory fuzzer, and ensured the Oric uses it.	2016-10-19 21:31:50 -04:00
Thomas Harte	734b575d30	Ensured no attempt to write to pixel storage if none was available.	2016-10-19 21:17:27 -04:00
Thomas Harte	ca28e3c64e	Ensured the AY is pumped linearly, not exponentially.	2016-10-18 22:21:06 -04:00
Thomas Harte	9669a5ec9b	Switched to a more authentic interfacing to the AY.	2016-10-18 19:32:15 -04:00
Thomas Harte	988bbb5ab1	Ensured AY registers aren't rewritten just because of a synchronise event. A stall prior to figuring out proper bus logic, clearly.	2016-10-17 08:05:57 -04:00
Thomas Harte	1a57e89ff0	Altered phase so that it now merely accounts for accumulated error across a frame. Can probably do better.	2016-10-17 08:04:15 -04:00
Thomas Harte	61ad0f8bdc	Fixed inverse characters, added an extra per-frame phase change, based on empirical observation, ensured header guard won't become ambiguous.	2016-10-16 22:14:01 -04:00
Thomas Harte	a67afb7efa	Switched to a tight crop on the pixel part of the display.	2016-10-15 21:43:46 -04:00
Thomas Harte	a608bbebfb	Performed enough wiring to put the onus back onto OricTAP to do appropriate things.	2016-10-15 21:32:59 -04:00
Thomas Harte	6d7c3f6ac2	Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric.	2016-10-15 21:21:18 -04:00
Thomas Harte	9730e8247f	Ensured propagation of synchronise messages, added enough to do plain tone. Probably. So: noise and envelopes missing. And it's all far too quiet.	2016-10-15 21:04:21 -04:00
Thomas Harte	51bdac27ae	Made some AY advances; it's now being polled for samples and collecting more information on what it needs to output.	2016-10-15 17:45:39 -04:00
Thomas Harte	da9c9ad51a	Added in the missing keys; added variable phase to the video.	2016-10-14 22:39:27 -04:00
Thomas Harte	288d10c253	Got some keyboard reaction.	2016-10-14 21:44:15 -04:00
Thomas Harte	3dbb602419	This seems to be a bit more likely.	2016-10-14 21:36:59 -04:00
Thomas Harte	138eabcff4	Continued in my effort to wire up a keyboard. Will need further to continue.	2016-10-14 21:35:15 -04:00
Thomas Harte	d8e4c488c2	Started iterating towards having an AY and a fully-working keyboard.	2016-10-14 21:18:03 -04:00
Thomas Harte	8867ad647c	Made an attempt at implementing the loopbacks necessary for diagnostics.	2016-10-13 21:47:12 -04:00
Thomas Harte	41e7eff6c8	Added a VIA. Now it's time to find out how poor my 6522 emulation is.	2016-10-13 20:50:55 -04:00
Thomas Harte	c9962f6502	Made an almost complete implementation of video. Just one row of the diagnostics cartridge seems to be off, showing thw wrong character set.	2016-10-13 19:34:29 -04:00
Thomas Harte	69920a4979	Made some basic first attempt at parsing video attributes; ensured lowest byte of ROM is readable.	2016-10-13 07:59:11 -04:00
Thomas Harte	ae48ad1bb4	Meaningful text! Albeit with the initial 'O' of 'Oric' missing. I guess control codes and NMIs next?	2016-10-12 22:03:54 -04:00
Thomas Harte	120b2d9e33	Switched to using a diagnostic ROM for now, as it'll definitely boot without initially requiring either a 6522 or AY. Have some forms appearing which imply I'm not doing badly, at least up to not knowing where I'm supposed to get character pixels from.	2016-10-12 21:52:47 -04:00
Thomas Harte	1f857c619b	Fixed timing issues. Static box of frame achieved!	2016-10-12 21:42:36 -04:00
Thomas Harte	304f0999cd	Made a faulty but hopefully creditable attempt to demarcate an Oric frame.	2016-10-12 21:29:21 -04:00
Thomas Harte	8c8a71107e	Added just enough wiring to add something that will generate the video, one day.	2016-10-12 19:20:23 -04:00
Thomas Harte	e6937d8003	Ensured that the ROM gets installed. So next for some video action?	2016-10-12 18:51:02 -04:00
Thomas Harte	4a062c616f	Added enough wiring to get Oric TAPs through to a completely unimplemented Oric emulation.	2016-10-11 22:20:13 -04:00
Thomas Harte	922dd6a586	Hit up the other two kinds of audio generator.	2016-10-07 17:10:00 -04:00
Thomas Harte	de658b70d7	That's thread safety, subject to the async task queue being made to work...	2016-10-07 17:02:36 -04:00
Thomas Harte	2d26feb073	Added mappings for the previously-missing characters @, [ and ].	2016-10-04 22:03:53 -04:00
Thomas Harte	f9ee6803df	It's likely this should be set at startup too, based on latest info.	2016-10-03 22:16:10 -04:00
Thomas Harte	97304e22f0	Adjusted per tests on StarDot; it appears the tape interrupts may fire during audio output, as if in tape output mode.	2016-10-03 20:03:14 -04:00
Thomas Harte	dae6b45464	Ensured the always-on bit of the interrupt status register is indeed on.	2016-10-03 19:15:31 -04:00
Thomas Harte	cd1ab09701	The Vic-20 now inserts ROMs again.	2016-09-29 20:15:25 -04:00
Thomas Harte	79412dc84d	Upped MFM clock cycles, switched back to using the typer for the ADFS and adjusted ADFS ROM slots.	2016-09-28 21:28:34 -04:00
Thomas Harte	4db086949a	Made an attempt to add MFM decoding to the 1770; ensured something is returned when reading the Plus 3 status register again.	2016-09-25 21:38:52 -04:00
Thomas Harte	572d5587d9	Made a first stab at enabling multi-disk machines and thereby obeying (some of) the Plus 3's status register.	2016-09-25 21:24:16 -04:00
Thomas Harte	9bbcbd1001	Renamed class, intending to turn a Disk::Drive into literally just that, and have a thing with a PLL that consumes events be a Controller.	2016-09-25 20:05:56 -04:00
Thomas Harte	7f4c78139c	Attempted to ensure that ADFS disks get to an appropriately-configured Electron. Not immediately sure why the shift press isn't working; doesn't need to be dealt with immediately.	2016-09-25 19:59:46 -04:00
Thomas Harte	6084020ab3	Added shift-break as a better way to boot suitable disks. Continued attempting to clean the 1770.	2016-09-25 14:11:22 -04:00
Thomas Harte	ce4100e5b9	Fixed slots for DFS and ADFS to sideways RAM; continued working on the 1770 to get as far as trying to get the body of a sector.	2016-09-24 22:04:54 -04:00
Thomas Harte	8db0030068	Fixed ROM loading by the Electron, turned the WD1770 into a 'disk drive' (it'll do for now), persuaded it to get all the way through a very specifically convenient type 1 command.	2016-09-20 22:14:33 -04:00
Thomas Harte	3b97b038b9	Corrected and sketched out state machine far enough to get to a complaint about unhandled work.	2016-09-20 15:56:31 -04:00
Thomas Harte	e358057440	Added a WD1770 run_for_cycles call. So I really can now move that as far as reporting that it has no disk?	2016-09-20 07:42:17 -04:00
Thomas Harte	cd5939501f	Treading water some more, ensured the DFS and ADFS ROMs get to the Electron. It now even inserts the DFS ROM if it has a DFS disk image. Might need to make it a sideways RAM though? Regardless, the next job surely — surely! — has to be to stop avoiding the 1770?	2016-09-20 07:36:57 -04:00
Thomas Harte	a9e65e9b7a	Tweaked disk side density, added call-outs to a WD1770 if the Electron had one (albeit without run_for_cycles yet as I need to figure out the clock rate), added a shell of the basic functions of the WD1770. No implementation yet.	2016-09-19 22:06:56 -04:00
Thomas Harte	64f2538b1f	Added CRC checking to DFS comprehension; fixed a bunch of places where I'd used Objective-C's #import rather than #include.	2016-09-19 08:16:06 -04:00
Thomas Harte	142254a478	Resolved failure to open disks that arrive through analysis.	2016-09-17 18:11:58 -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	e3571e8b9e	Added insurance against an infinite loop should the tape be exhausted.	2016-09-12 22:22:23 -04:00
Thomas Harte	40660fe680	Made yet another guess at Commodore analysis. Elevated fast tape-related unnatural speed up to the OS-side mechanisms.	2016-09-12 22:06:03 -04:00
Thomas Harte	e54a2326a3	Made attempt to run at zero cost while processing tape input.	2016-09-11 17:34:02 -04:00
Thomas Harte	eeec516fa6	Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator.	2016-09-11 17:09:00 -04:00
Thomas Harte	8c84f3581a	Attempted to bring some uniformity in application of configurations.	2016-09-08 05:32:17 -04:00
Thomas Harte	50175a9aed	Added logic to try to spot when the first program is BASIC and, if so, what the correct memory model is, then to get that information to the Vic. Though it currently then gets overwritten by the view controller. Grrrr.	2016-09-07 22:17:19 -04:00
Thomas Harte	21e5f407d8	I need to get a bit more definitive on naming but this gets all the way to setting a configuration upon an Electron.	2016-08-31 22:03:42 -04:00
Thomas Harte	56c0d70c1f	Gave disks their own namespace.	2016-08-27 17:15:09 -04:00
Thomas Harte	c0402d0c2b	Gave tapes their own namespace.	2016-08-27 17:09:45 -04:00
Thomas Harte	55ada536ac	Added a test call, further mutated result structure.	2016-08-27 14:25:16 -04:00
Thomas Harte	dab3580111	Experimental: can I afford a lower sampling rate if there's a low-pass filter in effect?	2016-08-22 22:18:05 -04:00
Thomas Harte	1541273785	Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately.	2016-08-21 18:13:31 -04:00
Thomas Harte	99157ad6b2	Ensured the 6560 knows its real audio clock on a PAL machine; removed some stray semicolons.	2016-08-19 13:35:34 -04:00
Thomas Harte	e985c72ce8	Removed a dead special case.	2016-08-19 12:23:06 -04:00
Thomas Harte	4edd1214f1	This has now successfully loaded its first PRG-as-a-tape.	2016-08-19 10:58:42 -04:00
Thomas Harte	2935848f35	Adopted header/header/data/data pattern. But still not complete joy.	2016-08-17 08:03:34 -04:00
Thomas Harte	dfe9fb83ef	This proves that bytes are being deposited properly. For the first 36 anyway, and with no announcement.	2016-08-16 21:09:50 -04:00
Thomas Harte	12f8aff65b	Lengths I'd taken seem to have been for dipoles, not single poles. So I just doubled the clock rate. Also I was producing each dipole as high then low, when they should probably be low then high. The Vic now at least recognises that something is happening on the tape.	2016-08-16 19:46:53 -04:00
Thomas Harte	ca2dc6b6c4	Ensured ROMs survive in the new memory model.	2016-08-15 19:56:01 -04:00
Thomas Harte	38aec44d85	Made sufficient changes for the Vic itself to believe it can recast a PRG as a tape and insert it that way. So now the ball is in the court of: how the heck are Commodore tapes encoded?	2016-08-15 19:44:41 -04:00
Thomas Harte	547aefb696	Slightly adjusted PRG strategy, made a note about where next.	2016-08-14 16:36:42 -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	a547b7e1d8	Took basic steps towards supporting memory expansions.	2016-08-13 17:21:25 -04:00
Thomas Harte	142774be37	Collapsed 6560 template to a more direct loop, albeit with quite a bit still left to fix.	2016-08-09 21:10:53 -04:00
Thomas Harte	12bad8f23f	Turned the 6560 into an ordinary template, similar to the rest of the project, albeit right now with a fairly shonky internal implementation. Fixed a Mac-specific interface sizing issue.	2016-08-09 20:41:05 -04:00
Thomas Harte	285a288c80	Switched to two cycles of options loading, meaning that they get set before files are inserted. Might need some further work?	2016-08-07 21:48:09 -04:00
Thomas Harte	be54d8040e	Made a first stab at having automatic loading be optional. But things are currently arranged such that the machine options are communicated too late to have an effect. So work to do.	2016-08-06 17:39:27 -04:00
Thomas Harte	3e65450a54	Converted the 6560 fully into a template; worked on allowing the typer to run at a much faster rate where hardware has some trigger by which it can request the next key.	2016-08-06 14:33:24 -04:00
Thomas Harte	d832e5e10d	Reduced 1540 PLL to running at 4Mhz. Which is possibly correct (?) Made minor change to avoid divide if possible.	2016-08-02 21:28:50 -04:00
Thomas Harte	5d40d70c92	Fixed 6560 addressing error, added an autotyper for Vic disks (more work potentially needed), fixed semantics for testing whether a 6502 is about to reset.	2016-08-01 10:32:32 -04:00
Thomas Harte	bc10b3ee9a	It appears the problem is as simple as sectors being counted from zero.	2016-08-01 10:08:38 -04:00
Thomas Harte	f5e4ea3351	Some minor tidying, lots more of the caveman stuff as I try to determine what I'm doing wrong.	2016-08-01 09:43:08 -04:00
Thomas Harte	18744cd98b	Slightly updated comments, switched to 1540 ROM so as very slightly to improve loading time.	2016-08-01 04:37:30 -04:00
Thomas Harte	b43a7381ae	Fixed framing and first-byte-after-sync signalling. Hacked together as parts of it are, loading now appears to work!	2016-08-01 04:25:11 -04:00
Thomas Harte	41893b5ef6	Put in the absolute minimum logic for drive motor emulation. Drive appears to be attempting head steps.	2016-07-31 19:38:51 -04:00
Thomas Harte	740ea0b7e2	Added overflow-flag setting logic and ensured disk ROM gets through regardless of ROM/disk installation order.	2016-07-31 19:33:18 -04:00
Thomas Harte	0945049cd3	Made attempt to connect sync detect and then apply appropriate windowing, posting bytes to the appropriate place.	2016-07-31 18:29:44 -04:00
Thomas Harte	198fbbedc7	Reeled back all appropriate pieces of caveman debugging.	2016-07-31 13:42:34 -04:00
Thomas Harte	2332f72875	Formalised clock-rate multiplication within disk drives, discovered that the stepper didn't have ideal behaviour for my timed event loop and hence nailed down the semantics a ilttle more. ... (obiter: the 1540 now appears to discern the correct sequence of bits. Framing is off in my test printfs but that's neither here nor there).	2016-07-31 13:32:30 -04:00
Thomas Harte	8f62211f5e	Wired up the 1540 as a PLL delegate. Which prima facie means it should start receiving a bit stream. Except that I clearly have something in the timing way off — either my flux transitions are far too short or I need to significantly increase the clock rate on the PLL.	2016-07-29 12:08:18 -04:00
Thomas Harte	89a1881fef	Started turning the 1540 into an actual disk drive.	2016-07-29 11:03:09 -04:00
Thomas Harte	ada2f073e0	Completed handing of the disk all the way to the 1540.	2016-07-10 16:24:46 -04:00
Thomas Harte	6cfc514c2d	Made the rote changes necessary to attempt to open and to supply a G64 to the Vic.	2016-07-10 12:57:17 -04:00
Thomas Harte	4ca6883f7c	Disabled attachment of a 1540 again, as I probably need to move to opening an actual disk image next.	2016-07-10 08:03:36 -04:00
Thomas Harte	824d9ea92b	Added further comments.	2016-07-10 08:01:16 -04:00
Thomas Harte	d8334edf4a	Started trying to clean up, including commuting the C1540 source file name to match its class name but mainly by adding documentation.	2016-07-10 07:46:20 -04:00
Thomas Harte	c0ab45a73d	Disabled a bunch of the caveman debug logging.	2016-07-09 22:29:11 -04:00
Thomas Harte	f589d639db	Okay, so it seems that sync also works the other way around.	2016-07-09 22:25:44 -04:00
Thomas Harte	693c8b2438	After all that, it seems likely that inputs just aren't inverted for the Vic.	2016-07-09 20:03:38 -04:00
Thomas Harte	656cd211d7	Was transmitting bit levels backwards (probably?); 1540 now acknowledges byte received.	2016-07-09 18:06:49 -04:00
Thomas Harte	7cc4bf3fe7	Hit and hope is getting me nowhere. Time to unit test this thing.	2016-07-09 15:40:25 -04:00
Thomas Harte	8827597363	Messier and messier, but I've at least attempted to implement hardware attention acknowledge.	2016-07-08 19:00:39 -04:00
Thomas Harte	9a08ef61cb	Still fumbling in the margins: made an effort not to imply that the 1540 is forever reading syncs.	2016-07-07 22:13:18 -04:00
Thomas Harte	199c0e27e0	Mostly just random guesses now, to be honest. It's approaching the end of my window for the morning.	2016-07-07 07:16:36 -04:00
Thomas Harte	81e6cc34e5	Per the ROM disassembly, the Vic's VIA outputs are inverted for the benefit of the serial bus.	2016-07-07 06:57:21 -04:00
Thomas Harte	c9479f923b	The inversion of truth was clearly just a problematic API. Got explicit. LineLevel might need to become more pervasive.	2016-07-07 06:44:13 -04:00
Thomas Harte	dcb86a027a	Okay, so the 1540 doesn't toggle the actual attention line. I don't know what it does yet but this helps.	2016-07-06 22:31:14 -04:00
Thomas Harte	1baf21827c	Since the ROM is well disassembled, let's actually try to be a 1541 first.	2016-07-06 22:17:32 -04:00
Thomas Harte	4f174786b5	Fixed potential buffer overrun.	2016-07-06 21:39:09 -04:00
Thomas Harte	f64cd8cfcb	Quick fixes properly to declare the DriveVIA, to ensure its interrupts take effect, and to wire ATN IN to CA1 rather than CB2.	2016-07-06 20:22:46 -04:00
Thomas Harte	428fcdb978	Centralised and improved serial logging.	2016-07-06 07:46:21 -04:00
Thomas Harte	8819711bc8	Threw in the second VIA as a currently clearly incorrect thing.	2016-07-05 22:22:09 -04:00
Thomas Harte	93c2bb80a2	Improved a comment, added independent C[A/B]2 input mode.	2016-07-05 21:11:51 -04:00
Thomas Harte	6c4fa4ec5d	Improved commenting and initial state communication.	2016-07-05 20:57:31 -04:00
Thomas Harte	1e6d90de17	Made an attempt properly to deal with initial bus state.	2016-07-05 20:52:33 -04:00
Thomas Harte	c3b7d24293	It appears that the attention line is also wired to CB2. So the ball is back in the 6522's court.	2016-07-05 19:19:46 -04:00
Thomas Harte	11fc43aa04	Made an attempt to allow the 1540 to talk back to the Vic, and to receive interrupts. Also slightly disambiguated debugging logging.	2016-07-05 19:12:43 -04:00
Thomas Harte	d16b79073e	Further fleshing out: added a serial port for the serial bus.	2016-07-05 17:27:02 -04:00
Thomas Harte	d1eea6943d	Ensured the 1540 ROM gets installed, at least.	2016-07-05 16:54:25 -04:00
Thomas Harte	86dabd007b	Furthered fleshing out of the 1540. Though it doesn't yet receive a ROM so won't even attempt to do anything meaningful.	2016-07-05 16:39:18 -04:00
Thomas Harte	a25fcc7190	Made a first attempt at wiring back serial port input.	2016-07-05 16:10:54 -04:00
Thomas Harte	d2cded7b59	Attempted to separate out the concept of a serial port and a serial bus, since the bus may be shared, and to establish half duplex communications from the Vic.	2016-07-05 14:55:20 -04:00
Thomas Harte	0d3d0fbe4d	Created a namespace for Commodore and an empty container file for the 1540[/1] implementation.	2016-07-05 13:28:27 -04:00
Thomas Harte	97751a9d86	Took the preliminary steps necessary to wire up a serial port.	2016-07-05 10:55:47 -04:00
Thomas Harte	a49f2b41cc	Added C++ side of things. I think.	2016-07-04 21:48:25 -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	82b0bc9b58	Discovered that this is another meaningful usage of using.	2016-07-04 19:10:10 -04:00
Thomas Harte	7e5b631e30	Cut some dead code.	2016-07-01 19:02:29 -04:00
Thomas Harte	7fa010a463	Attempted to add support for the most basic of control line output, and slightly to optimise the Vic.	2016-07-01 19:01:22 -04:00
Thomas Harte	ed8f4d0476	Added some minor additional bits of documentation.	2016-06-30 08:46:29 -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	6027cba95f	Factored out the stuff of pushing a fast-loading option onwards and storing it within the user defaults.	2016-06-27 21:38:14 -04:00
Thomas Harte	e3e6bbb785	Removed the colon again, until I can educate myself a little further.	2016-06-26 21:38:03 -04:00
Thomas Harte	69d78dfdb3	Removed logging.	2016-06-26 21:36:26 -04:00
Thomas Harte	1439ca0580	Added a quick automatic issuing of the 'LOAD' command.	2016-06-26 21:34:37 -04:00
Thomas Harte	843d1fdca7	Added some extra logging while trying to determine what's going on; added interrupt clearing for the control lines.	2016-06-26 21:30:06 -04:00
Thomas Harte	2a2c3da5d4	Added hardwired tape present bit.	2016-06-26 19:50:49 -04:00
Thomas Harte	c306d705e1	Made a quick first attempt at all-the-way-through tape wiring for the Vic.	2016-06-26 19:43:09 -04:00
Thomas Harte	37ba42a52f	Factored out the stuff of playing a tape, started basic sketch of the Vic-related classes.	2016-06-26 19:03:57 -04:00
Thomas Harte	d5e50f5ea0	Got a bit more explicit about how ports are identified on the 6522.	2016-06-26 12:30:01 -04:00
Thomas Harte	8d9eb30d82	So it sounds like the user-port VIA might actually be connected to NMI?	2016-06-25 16:31:35 -04:00
Thomas Harte	8741be5c84	Made the slightest possible effort to get TAPs opened and passed to the VIC.	2016-06-25 16:24:52 -04:00
Thomas Harte	2bd71e7e9b	.reset is the more normal way to reassign a unique_ptr.	2016-06-23 20:52:44 -04:00
Thomas Harte	e05003c176	Discovered that the VIC and the VIAs can be simultaneously selected. Adjusted bus appropriately.	2016-06-22 17:34:42 -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	b6dd38dad3	Corrected type safety warning.	2016-06-19 21:41:01 -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	6dd8ea67c9	Tested and trimmed delay on typing if resetting.	2016-06-19 17:27:23 -04:00
Thomas Harte	05cb47709e	Implemented Utility::Typer for the Electron. So that now also receives pastes.	2016-06-19 17:25:35 -04:00
Thomas Harte	ef3ed1f436	Implemented full paste ability for any machine that is a typer.	2016-06-19 16:35:04 -04:00
Thomas Harte	3fc472d5cb	Expanded typing to include phase for machines that need to go through multiple keypresses to reach a certain state, expanded Vic to be able to type most things (still bodged on lowercase though), and to schedule a 'run' if it's supposed to be loading into RAM, spotting that opportunity actually to do so.	2016-06-19 13:46:53 -04:00
Thomas Harte	e7aeed2f03	Established a general pattern for machines that can type things. Started working on the Vic typing itself.	2016-06-19 13:10:52 -04:00
Thomas Harte	f4915c5ad6	Fixed test and added basic implementation of data direction.	2016-06-18 17:17:03 -04:00
Thomas Harte	394902f409	Switched to clocking the 6522 by the half-cycle. Very trivial test now passes.	2016-06-18 13:57:10 -04:00
Thomas Harte	595791cee0	Made the base 6522 class more abstract: you must now opt-in if you want the IRQ line to be sent to a delegate.	2016-06-18 08:51:18 -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	fdc854c0c2	Fixed tone channels; made an attempt at loading PRGs that are supposed to go into RAM.	2016-06-13 21:49:59 -04:00
Thomas Harte	5fc36b956c	Attempted most basic sketching of a container for Vic audio.	2016-06-13 19:30:52 -04:00
Thomas Harte	4190b42bbb	No need for these to live separately, I think.	2016-06-13 18:27:18 -04:00
Thomas Harte	19b2f46488	Fixed accesses to colour memory.	2016-06-12 11:06:19 -04:00
Thomas Harte	4fec625b19	Minor cleaning, implemented clearAllKeys.	2016-06-12 10:38:21 -04:00
Thomas Harte	167ed9b8bb	Added enough to load a PRG as a ROM.	2016-06-11 14:00:12 -04:00
Thomas Harte	3e8d383615	Improved key map. Possibly enough to type some basic BASIC?	2016-06-11 13:19:59 -04:00
Thomas Harte	d1731b1d26	Hacked my 6522 to work. Mistake is in not returning output as input when appropriate — i.e. that I'm ignoring data direction. Also fixed K and L keys.	2016-06-11 13:06:01 -04:00
Thomas Harte	271de23ee6	Ran on in and introduced a bunch more keys, hopefully to help to diagnose.	2016-06-11 12:26:19 -04:00
Thomas Harte	d7c1f5b18a	Made an attempt at hooking up the '2' and '4' keys. A mostly unsuccessful attempt. 2 does nothing, 4 clears the screen.	2016-06-11 11:50:37 -04:00
Thomas Harte	7a241b5ef5	Added just enough hopefully to allow implementation of the keyboard-input VIA.	2016-06-11 11:34:39 -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	1ed04fae1e	Resolved 6560 addressing.	2016-06-10 18:12:21 -04:00
Thomas Harte	f3b1d7de82	... and that's a flashing cursor. Keyboard input next!	2016-06-09 22:37:59 -04:00
Thomas Harte	30b7db3979	Attempted a square wave, made the Vic itself responsible for address manipulation re:the 6560.	2016-06-09 22:05:17 -04:00
Thomas Harte	e99055bedb	Attempted switching back to a square wave for the composite video and otherwise implementing what's necessary to get to that flashing cursor — the 6560 returns its scan line and the timing bits of the 6522 are appearing.	2016-06-08 22:15:24 -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	26ab96868a	Decided to turn the 6522 into a template, since it's a per-cycle thing with variable behaviour. Added appropriate memory map callouts to hit the two in the Vic. Though they don't yet do anything.	2016-06-07 19:15:18 -04:00
Thomas Harte	c7c55528e2	Realised that registers appear also to be readable.	2016-06-06 20:29:39 -04:00
Thomas Harte	64539a2b24	Advanced to having some characters displayed, even though they're obviously very much incorrect and the display is still rolling.	2016-06-06 07:35:35 -04:00
Thomas Harte	9e9e50edb1	Added guess on how colour memory and the 12-bit bus possibly works.	2016-06-05 16:28:06 -04:00
Thomas Harte	2ab21e7a3c	Switched to a real (unexpanded) memory map, meaning that nonsense is no longer being supplied to the VIC.	2016-06-05 16:00:35 -04:00
Thomas Harte	9566c87532	Added enough to the machine that the 6560 can now produce output if it wishes.	2016-06-05 12:11:12 -04:00
Thomas Harte	b56482607e	Added just enough that the 6502 should now be operating correctly.	2016-06-05 11:44:29 -04:00
Thomas Harte	0b221e773f	Fixed ROM naming and sizes, ensured machines without sound outputs don't end up with an audio queue.	2016-06-05 11:20:05 -04:00
Thomas Harte	f922d38ed2	The Vic now captures the ROMs sent to it and has just enough infrastructure to get to a black screen. Progress!	2016-06-05 10:51:07 -04:00
Thomas Harte	12243c40ad	Kicking the ball a little further down the road, ROMs and PRGs now reach the actual emulated machine.	2016-06-05 09:06:59 -04:00
Thomas Harte	b10a06e700	A CRT is still absent but this moves the ball back into the C++ side's court.	2016-06-04 22:00:50 -04:00
Thomas Harte	404873fe58	Started sketching out infrastructure for Vic-20 support.	2016-06-04 21:43:50 -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	5a4262d74e	Confirmed: it is inaccurate for a 6502 to self reset at power up. So that responsibility now rests in the machines.	2016-05-10 21:05:52 -04:00
Thomas Harte	1142c86811	Slightly simplified conditional.	2016-05-07 18:38:51 -04:00
Thomas Harte	bf9917707e	Merge branch 'master' into Glitches	2016-05-05 08:31:40 -04:00
Thomas Harte	fea32869b0	Implemented what I now believe to be the real paging logic.	2016-05-05 08:28:06 -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	ae2760e034	Colour phase is now updated and varies per line.	2016-04-21 21:07:29 -04:00
Thomas Harte	7aa87723a9	Added: key states are all cleared if the window loses focus. Which resolves sticky key issues. Allowing me just to use command+option+O for options and map both command and option as FUNC.	2016-04-19 21:29:10 -04:00
Thomas Harte	66f2c10c04	Resolved potential crash if tape requests are made without one inserted. Softened glFinish to glFlush, though I'm still not sure I should strictly need even that.	2016-04-19 21:00:48 -04:00
Thomas Harte	3d53f157de	Output selection now takes effect. So I can stop accidentally committing changes back and forth.	2016-04-18 08:27:58 -04:00
Thomas Harte	94f148e212	Wired in options, at least getting as far as the Objective-C bridge. Then fast loading makes it to the emulated machine, display output type doesn't.	2016-04-18 08:21:00 -04:00
Thomas Harte	499f7ace07	Re-enabled working video output for the Electron for the day and consolidated the rough metric I'm using to pick a number of taps for the audio filter.	2016-04-17 20:43:20 -04:00
Thomas Harte	6ff9ffba6c	Switching temporarily to an attempt to draw input runs as if RGB: shader compiles, fixed a race condition on out-of-bounds accesses for the source buffer.	2016-04-17 15:51:28 -04:00
Thomas Harte	104f44f27f	Attempted to improve deinterlacing, gave the CRT full control over blend mode, switched back to 2000000Mhz audio.	2016-04-14 22:20:47 -04:00
Thomas Harte	6a17c2992d	Introduced a compile-time configurable audio divider, set it arbitrarily to '8' for now. Discovered why my graphics aren't centred and added a TODO.	2016-04-13 22:31:59 -04:00
Thomas Harte	026ce0255f	Source runs are now captured, and that buffer appropriately reset.	2016-04-13 22:20:13 -04:00
Thomas Harte	2ea02ed127	A source array buffer is also now created, mapped, unmapped, etc.	2016-04-13 22:14:18 -04:00
Thomas Harte	955e185790	Minor simplification.	2016-04-13 19:19:04 -04:00
Thomas Harte	4d889d9c7f	Made an attempt slightly to simplify the fragment processor, at both ends.	2016-04-12 22:35:11 -04:00
Thomas Harte	2cc72169ff	Ensured machines can nominate their own aspect ratio windows. Switched to 11/10 for the Electron.	2016-04-11 23:12:56 -04:00
Thomas Harte	7276a06cc0	Added a helper to calculate a visible rect based on output timings, used it to scale the Electron output up to the full window size.	2016-04-11 21:47:23 -04:00
Thomas Harte	a3c2cd880e	I discovered a further post on this on the STH forums; apparently the Electron simply asserts sync continuously. No breaks.	2016-04-11 21:01:09 -04:00
Thomas Harte	bdb99ba92f	Corrections back towards composite output: fixed misnamed constant, ensured the CRT doesn't write nonsense to the output buffer, ensured it grows three vertices at a time rather than six when desired. Net effect should be that the output stage is working again, with the input processing remaining to fill in.	2016-04-10 22:56:52 -04:00
Thomas Harte	8701366277	Switched horizontal sync detection back to differential, switched the Electron to an XOR-style sync output (believed to be accurate, but I need to check), fixed some latent issues around vertical sync detection.	2016-04-10 21:34:40 -04:00
Thomas Harte	e617bd2bb3	Turned audio quality up to the maximum, at least for now.	2016-04-06 21:12:22 -04:00
Thomas Harte	5aa6da221f	Shifted responsibility for byte shifts, probably to a more logical place.	2016-04-05 22:19:14 -04:00
Thomas Harte	2248769df9	Pulled a bunch of selection parts outside of the loops. Probably exhausting this angle of attack.	2016-04-05 22:17:44 -04:00
Thomas Harte	8f87973a96	Switched to table-based byte to output conversion.	2016-04-05 22:07:10 -04:00
Thomas Harte	e35456612a	Simplified 40-column to pixel conversion.	2016-04-05 20:44:05 -04:00
Thomas Harte	6dbd20ffde	Expanded interface to rgb_sample to eliminate its need to make assumptions about globals, used expanded interface to compact Electron data to two pixels per byte.	2016-04-05 20:32:55 -04:00
Thomas Harte	7838507a7a	Simplified sound generation.	2016-04-04 22:22:19 -04:00
Thomas Harte	729fddea1c	Switched to integer textures, likely to simplify for most use cases.	2016-04-04 19:39:01 -04:00
Thomas Harte	3ca58b2a57	Attemted further to diminish jumpiness.	2016-03-22 22:07:30 -04:00
Thomas Harte	8cd5d40e00	Made an attempt to reduce the amount of data heading to the GPU.	2016-03-22 21:16:32 -04:00
Thomas Harte	902017a962	Fixes: drop any processing backlog, try not to allow an Electron document to close mid-draw, perform a frame grab even if the emulated machine is over-processing, really really don't create a CRT until it's safe.	2016-03-20 18:42:37 -04:00
Thomas Harte	fb6fb5d948	Switched to two-phase setup to deal with OpenGL scheduling.	2016-03-20 13:50:13 -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	b074860031	Updated to latest information on interrupt timing.	2016-03-18 21:11:25 -04:00
Thomas Harte	4cd0aa3416	Completed FIR filter based audio output.	2016-03-15 23:37:35 -04:00
Thomas Harte	0edf165401	Fixed sound pitch, though I'm not yet exactly sure why.	2016-03-14 22:52:16 -04:00
Thomas Harte	9a492ac15f	Made a further guess at the state interrupts would probably be left; slightly simplified interface.	2016-03-14 22:42:52 -04:00
Thomas Harte	15120d8fb6	Switched to probably more accurate contended memory, resolved issue of not leaving the tape data received interrupt set when returning a byte from the fast tape, fixing Joe Blade, and tested slightly further to determine that interrupts probably signal upon entry into horizontal sync.	2016-03-14 19:29:28 -04:00
Thomas Harte	fb26b38ff9	This is as simplified as things seem to be able to get without breaking at least Northern Star. Joe Blade et al remain stubbornly broken but I'm not immediately able to determine why.	2016-03-13 19:55:20 -04:00
Thomas Harte	f797e6b5b6	Started taking baby steps towards a genuine unification of the tape interrupt generating code.	2016-03-13 19:45:50 -04:00
Thomas Harte	bc554dedf7	Fixed: attempting to read the screen start address no longer alters it.	2016-03-13 18:50:23 -04:00
Thomas Harte	1c4acfb599	I think this is a prima facie acceptable implementation of the fast tape hack.	2016-03-13 17:39:53 -04:00
Thomas Harte	4462bb92f8	Moved interrupt back down to where it's probably meant to be.	2016-03-12 23:18:46 -05:00
Thomas Harte	cdff90f20d	Fixed: setting an interrupt control value with the lowest bit set could result in interrupts that can't be disabled.	2016-03-12 22:55:33 -05:00
Thomas Harte	6327311130	Made an attempt to separate and clarify on tape interrupts.	2016-03-12 20:32:26 -05:00
Thomas Harte	cfa616d593	Fixed: timing issue versus supplied test ROM was failure to include the Plus 1 ROM in the mix.	2016-03-12 11:51:20 -05:00
Thomas Harte	763d5e8819	Access timing now appears to be exactly on the nail. Disabled automatic interrupt expiration again as I'm not persuaded it's correct for at least the RTC.	2016-03-10 23:12:28 -05:00
Thomas Harte	e305fd9326	Adjusted numbers, empirically.	2016-03-10 22:40:18 -05:00
Thomas Harte	a89225987f	Blank lines are back.	2016-03-10 22:19:54 -05:00
Thomas Harte	b836d74e18	Believing the previous implementation to be overly complicated through premature optimisation, simplified video. It's slightly slower now. Will need work. Immediately to do: figure out how to deal with blank scan lines.	2016-03-10 22:08:50 -05:00
Thomas Harte	20ac630e4d	Some minor optimisations and timing tweaks. Nothing of substance.	2016-03-10 19:58:50 -05:00
Thomas Harte	df3fff51c7	These interrupts apparently last only 64µs at most.	2016-03-10 19:10:53 -05:00
Thomas Harte	f232a12fad	Fixed RAM timings: it's at least two and possibly three cycles to access RAM, and an access that overlaps with video fetch in Modes 0–3 will cost the length of the video fetch rather than somehow finishing in time.	2016-03-10 19:04:43 -05:00
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	6dfe877c43	Basic attempts to organise myself into shape for composite output continue.	2016-03-07 21:22:47 -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	cd9c62acca	Still stepping slowly towards a working composite mode, switched the RGB sampling function to returning a vec4, which may be of benefit to any machine with a brightness part of an RGB signal, and started edging towards at least having the correct GLSL programs ready for converting composite output.	2016-03-07 19:08:26 -05:00
Thomas Harte	3b6c9c15a1	Switching momentarily back to monitor mode, resolved why I was suddenly getting no output upon creating some texture targets.	2016-03-07 18:55:15 -05:00
Thomas Harte	eefd17ed4c	Fixed sync response in composite scan output generation and stored texture coordinates.	2016-03-05 21:52:22 -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	1c6de7692d	Made an attempt to fix tape output interrupts; offloaded raster width and placing conversion to the GPU.	2016-02-27 20:37:41 -05:00
Thomas Harte	db18c85423	Simplified the run builder rather; put a double check of Electron timing in place.	2016-02-25 22:01:42 -05:00
Thomas Harte	1eea28b692	Disabled some debugging parts, added some others, marked some things as inline. Ticking over.	2016-02-22 23:35:42 -05:00
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	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	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	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	7bd237193d	Edged closer towards realistic timing.	2016-02-13 20:52:35 -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	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	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	2e3ba6bbb2	Removed some logging.	2016-02-07 14:42:40 -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	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	4554abb755	Made an attempt to be more rigorous in display generation on the Electron, to make sure I deal with mid-line changes to/from blank line mode. Even if it turns out that they generate pixels.	2016-01-29 21:14:13 -05:00
Thomas Harte	adc6838ba0	Continued slow migration of shader ownership to CRT. Attempted to start debugging the tape interface.	2016-01-27 21:35:57 -05:00
Thomas Harte	96c946b8af	Made a very basic attempt to emulate tape output.	2016-01-24 18:20:55 -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	cd97617a8a	Bumped the speaker up to the full namespace, since Tape lives there to avoid delegation complexity. Turned the CRT into something the Electron statically owns, fixing a memory leak by simplifying.	2016-01-23 17:45:06 -05:00
Thomas Harte	f4cd0aa38e	Ensured that all relevant information is given to the tape class. Made an attempt not to write to a screen output buffer if we don't have one. Added some debug printing.	2016-01-23 13:09:56 -05:00
Thomas Harte	949c33774a	Fixed failure to set a delegate, slowed tape speed if operating in RAM.	2016-01-23 11:42:14 -05:00
Thomas Harte	43a7d1b7ae	It'll be helpful to be able to isolate the tape interface when I'm faking a fast load. So factored out.	2016-01-23 00:14:44 -05:00
Thomas Harte	0efe4b312c	Disabled my various bits of rate interchange debugging; improved test for when to call update_display due to a RAM write.	2016-01-21 22:16:52 -05:00
Thomas Harte	82cb1c365c	Further simplified inner loops.	2016-01-21 21:35:04 -05:00
Thomas Harte	34640cec93	Started trying to move some logic out of the inner loop.	2016-01-21 21:28:09 -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	4c16d34063	Moved set_tape so that the inline definition of get_next_tape_pulse is visible to it. Also eliminated some dead typedefs.	2016-01-20 08:27:25 -05:00
Thomas Harte	280a2292ff	Shushed.	2016-01-19 23:33:15 -05:00
Thomas Harte	9036cf3b7c	Thus did the first UEF load.	2016-01-19 23:03:27 -05:00
Thomas Harte	e65cd4cf06	Some data is marginally reaching the CPU from the tape.	2016-01-19 22:05:34 -05:00
Thomas Harte	956b90e203	Attempted further to improve latency; added view adjustment for non-4:3 output aspect ratios. The 4:3 is currently hardcoded, so further work will be required.	2016-01-18 23:55:52 -05:00
Thomas Harte	e63b6d22ae	As shown by the commented-out code, the aliasing-adaptation seems to be working. So something is wrong somewhere else.	2016-01-14 21:59:37 -05:00
Thomas Harte	383b2be4c6	Fixed one off-by-one error.	2016-01-14 21:33:27 -05:00
Thomas Harte	8bd04a6be4	Switched model for filter subclasses. Implemented test square[-ish] wave to check for obvious stream errors. None is clear.	2016-01-14 21:27:02 -05:00
Thomas Harte	38ffcaa262	Here, at last, is _some_ audio output, at least.	2016-01-14 20:33:22 -05:00
Thomas Harte	439d452e23	Resolved some errors.	2016-01-13 22:11:33 -05:00
Thomas Harte	49e89a4bcb	I'm not yet completely convinced by my approach to time basing, but it'll probably do? If so then this more or less gets me ready for a point-sampled filtering.	2016-01-13 22:02:39 -05:00
Thomas Harte	d9a7ef9e46	Edging towards audio output; the speaker is given appropriate input and output rates, and then updated with current divider and enabled/disabled status.	2016-01-13 21:03:43 -05:00
Thomas Harte	d28abdc037	Made an attempt at correct timing, adding support for additional paged ROMs, added file association for .rom.	2016-01-12 22:34:26 -05:00
Thomas Harte	84ba4e2900	Tidied a little, started working towards supporting speaker output.	2016-01-12 22:19:56 -05:00
Thomas Harte	75d6ec354b	Added some very basic filtering in RGB mode.	2016-01-12 16:27:09 -05:00
Thomas Harte	cba09b5490	Switched display update and RAM write order.	2016-01-11 22:29:16 -05:00
Thomas Harte	650077feac	Pulled a few things out as constants, zoomed in a little. Still in a 4:3 window though.	2016-01-11 22:18:34 -05:00
Thomas Harte	72019d0ea3	Made an attempt to get video output correct.	2016-01-11 22:08:30 -05:00
Thomas Harte	e93dbdb463	Implemented keyboard input.	2016-01-11 19:48:31 -05:00
Thomas Harte	ce916ebd6a	Fixed runaway frame generator.	2016-01-10 23:32:57 -05:00
Thomas Harte	ccf20299a3	Made an attempt at getting some interrupts all up inside this thing.	2016-01-10 19:06:46 -05:00
Thomas Harte	cc5ba8243e	Fixed: turned out the power-on bit was being cleared.	2016-01-10 17:17:39 -05:00
Thomas Harte	d95414b2eb	I'm not really sure what's going wrong with paging yet but this fixes the 0xc000 byte error.	2016-01-10 12:30:24 -05:00
Thomas Harte	e07981c147	Fixed screen start address.	2016-01-09 22:52:08 -05:00
Thomas Harte	1308332a71	Hard-coded to 40 columns of black and white, here's some text, at least.	2016-01-09 22:39:46 -05:00
Thomas Harte	037602765a	This now correctly (I think) decodes information posted to the CRT. But doesn't yet post it correctly. I'm very close now, I hope.	2016-01-09 22:19:00 -05:00
Thomas Harte	07a041d788	Fixed vertical retrace sync.	2016-01-09 21:54:31 -05:00
Thomas Harte	3d6f20b7b9	Output, at last! Though sync is clearly way off.	2016-01-09 21:53:33 -05:00
Thomas Harte	b4f31edea3	Made an attempt to get RGB output mode up and running, and showing at least a box where pixels would be.	2016-01-09 21:32:56 -05:00
Thomas Harte	a900bfed65	Fixed to ensure that frame rendering wraps around, and to properly connect the Electron to its view. Now I need a working pixel shader.	2016-01-09 20:34:22 -05:00
Thomas Harte	7341f5c341	This is intended to be enough to start producing something of an output. But something's obviously still broken.	2016-01-09 20:26:40 -05:00
Thomas Harte	716bb3281b	This at least now connects up a CRT, though it never talks to it.	2016-01-07 22:26:49 -05:00
Thomas Harte	47a7654c00	Added just enough that this is probably a successful boot. I guess I'm going to need to get invested in graphics next? Hmmm.	2016-01-07 21:01:13 -05:00
Thomas Harte	8c1bfa5a05	This is the bare minimum to prove that the ROM is trying properly to boot.	2016-01-07 20:36:27 -05:00
Thomas Harte	0db8938d27	Added the option for the CSCathodeRayView to show only a subsection of the full scan area. Zoomed in a little on the 2600. Put in enough piping to give the Electron sight of its ROMs at least.	2016-01-06 23:14:36 -05:00
Thomas Harte	bfd9957c81	You now get an Electron only if you ask for a new file. That'll do for now while it's the only thing that one might want to start without supplying a file. The 6502 now starts from a defined point — being reset. The Electron is starting to grow the absolute most simple buds of its memory map.	2016-01-06 21:09:49 -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
Thomas Harte	675070c5dd	Very, _very_ minor: switched to normal C++ constructor syntax for simple variable initialisation.	2015-12-06 16:53:37 -05:00
Thomas Harte	5d6bee4927	Of course, being in-phase means being the cosine wave.	2015-09-10 21:30:39 -04:00
Thomas Harte	82aa6d074a	'type' is out, at least for the time being.	2015-09-05 20:25:30 -04:00
Thomas Harte	7fb6c86d9d	Okay, it looks like colour 3 is approximately phase offset 0, and the palette wraps around after 14 entries, not 16. Also got a bit less dependent on floating point accuracy for the step.	2015-09-05 17:10:41 -04:00
Thomas Harte	80cf3d9301	Formally gave the 2600 responsibility for providing the code that decodes one of the things it has put into a buffer into a composite sample.	2015-09-03 12:28:16 -04:00
Thomas Harte	ac8fc9a1a0	Experimenting with pre-encoding luminance and chrominance separation over on the ... CPU as otherwise the GPU does them repetitively and more awkwardly (as it's working purely in floats). It means uploading twice as much data though, so I don't know. Still only half as much as the RGBA path of a few days ago. Will experiment. Also slightly adjusted division of responsibility in the fragment shader per the desire to have the `sample` function owned externally.	2015-09-03 11:15:23 -04:00
Thomas Harte	cb6e6e8acb	It's the worst fragment shader you'll ever see. The worst. But this attempts NTSC composite video emulation, artefacts included.	2015-09-01 22:36:45 -04:00
Thomas Harte	043d2f9896	It sounds like the two sync signals are exclusive ORd.	2015-08-19 21:36:33 -04:00