Thomas Harte
d9f0065154
Sketched out just enough classes to get through the get-contents-into-memory step of static analysis.
2016-08-28 12:20:40 -04:00
Thomas Harte
24938326ac
ROMs definitely have no behaviour other than responding to memory accesses. Cartridges might. So picked the more general term. Sketched out a class at least to parse PRG as though it were a cartridge. Hence the static analyser can guess at whether a PRG is a cartridge or an ordinary program.
2016-08-27 18:26:51 -04:00
Thomas Harte
a1b3a18d11
Started forcing a resolution on ROMs by doing. But have immediately misstepped. Rename coming momentarily...
2016-08-27 18:17:40 -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
8c333059a8
Turning this into a slog: gave UEF a more appropriate name, got as far as now having to decide what to do about ROMs as to structure. I guess they're machine specific, so specific classes?
2016-08-27 16:40:21 -04:00
Thomas Harte
e68ff64045
Actually, this is less prescriptive.
2016-08-27 13:42:51 -04:00
Thomas Harte
5ffd9e4f0d
This is probably how the static analyser interface will look?
2016-08-23 21:35:59 -04:00
Thomas Harte
0d077691b0
Resolved warning.
2016-08-23 21:10:22 -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
6079d30e58
Eliminated waiting here — either the buffer can be enqueued now or it is dropped.
2016-08-14 16:20:24 -04:00
Thomas Harte
5373f6cc57
Completed setting of options, including mapping from country to ROM + television standard.
2016-08-14 14:23:08 -04:00
Thomas Harte
b5af1746d5
Added a through path to the Objective-C for setting region and memory size.
2016-08-14 14:14:59 -04:00
Thomas Harte
f15d89239f
Made a stab at storage and restoration of country and memory size.
2016-08-14 14:00:08 -04:00
Thomas Harte
df77c2a20a
Added the XIB side of wiring for region and memory size options.
2016-08-14 13:53:14 -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
58297f1baf
Performed the basic metadata and routing for opening D64 files. Realised that I wasn't actually necessarily catching exceptions properly for all file opens, and fixed.
2016-08-01 07:09:15 -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
89a1881fef
Started turning the 1540 into an actual disk drive.
2016-07-29 11:03:09 -04:00
Thomas Harte
0e581c7607
Factored out the stuff of running a timed event loop from the TapePlayer.
2016-07-29 07:15:46 -04:00
Thomas Harte
e55db0cfe8
Made an attempt to eliminate creeping tape processing accuracy misses, which implied factoring out the GCM and LCD functions, which I then felt didn't really amount to signal processing.
2016-07-29 05:19:01 -04:00
Thomas Harte
015cea494d
Switched to a much-more straightforward PLL. I think I'm just fiddling now rather than moving forwards. Probably time to move on?
2016-07-28 11:32:14 -04:00
Thomas Harte
e061e849d4
Had a second bash at the PLL. Probably I should read some of the literature.
2016-07-27 16:24:24 -04:00
Thomas Harte
0aa90b943b
Switched to specifying bit length as a quotient for the purposes of a PCMSegment and verified that I had the logic for picking a Commodore time zone backwards: bigger numbers are faster, not slower.
...
Started sketching out a DiskDrive class.
2016-07-15 06:51:11 -04:00
Thomas Harte
74817f6664
With a history of three pulses, this can track up a 10% sine variation in a 1010101 stream. So I guess this'll do for now?
2016-07-14 19:54:48 -04:00
Thomas Harte
ac1bc588dd
Improved factoring and increased window of testing, causing both the fast and slow tests to show framing errors.
2016-07-14 07:12:02 -04:00
Thomas Harte
d1fe07f14d
Added test of perfect DPLL input timing.
2016-07-12 21:42:23 -04:00
Thomas Harte
75d95c0bc0
Sketched out an interface for a digial PLL. Not persuaded yet. Baby steps.
2016-07-11 22:12:58 -04:00
Thomas Harte
1e9eedc314
Factored out the PCM track since it's going to be a useful construct for almost every file format. Documented it a little better.
2016-07-10 18:36:52 -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
ff49857f5c
Started sketching out support for the G64 file format.
2016-07-10 10:17:53 -04:00
Thomas Harte
9e3d6b762b
Sketched out the generic interface for a disk, documenting it and the tape interface while I'm here.
2016-07-10 08:54:39 -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
656cd211d7
Was transmitting bit levels backwards (probably?); 1540 now acknowledges byte received.
2016-07-09 18:06:49 -04:00
Thomas Harte
01746f0512
This is probably a valid test. But I'm not completely sure. Time to figure out what's happening on the 1540 end.
2016-07-09 18:01:04 -04:00
Thomas Harte
cd84c35552
Whoops, one bit too short.
2016-07-09 17:51:46 -04:00
Thomas Harte
cd362b46b3
This is a valid attempt to send a whole byte, I think.
2016-07-09 17:51:04 -04:00
Thomas Harte
3560babd7e
Got back to a failing test, now while trying to transmit a whole byte. Good stuff!
2016-07-09 17:39:51 -04:00
Thomas Harte
66caa3c6dc
Fixed setup of bridge class.
2016-07-09 17:23:43 -04:00
Thomas Harte
bf03985ea4
Here's an instantly failing test...
2016-07-09 17:22:10 -04:00
Thomas Harte
da6fe2e983
This should be enough of a shell to write some actual tests.
2016-07-09 15:47:53 -04:00
Thomas Harte
865eb421cd
Quick on-disk tidy up.
2016-07-09 15:44:55 -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
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
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
d1eea6943d
Ensured the 1540 ROM gets installed, at least.
2016-07-05 16:54:25 -04:00
Thomas Harte
47548dcedc
Fixed an erroneous #import.
2016-07-05 16:39:31 -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
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
df4724eb3e
Added a modal toggle allowing the keyboard to be switched between being a keyboard and being a joystick for the Vic.
2016-07-04 22:01:07 -04:00
Thomas Harte
88964ceac0
Eliminated plain pointer passing for object types.
2016-07-04 19:33:55 -04:00
Thomas Harte
6dbf16210b
Switched protocol to meaningful name and corrected its omission from the repository.
2016-07-04 19:19:07 -04:00
Thomas Harte
b322baff2f
Added CLI/SEI pair test.
2016-06-29 19:42:39 -04:00
Thomas Harte
db7c6430b5
Fixed Klaus Dormann termination condition.
2016-06-29 19:16:34 -04:00
Thomas Harte
6419d9c485
Added a single IRQ test case, discovering that I'm two cycles short. Whoops!
2016-06-28 21:29:43 -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
9134e4de1f
Added a partially-wired options menu for the VIC.
2016-06-27 18:49:53 -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
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
ee19417ded
Made an attempt quickly to implement parsing of the Commodore .TAP file format.
2016-06-25 16:09:32 -04:00
Thomas Harte
b8728285e7
An overridden getter looks more like this in Swift.
2016-06-23 21:09:34 -04:00
Thomas Harte
097a9caa95
Delegates are all nullable, naturally.
2016-06-23 09:37:49 -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
3591479571
Fixed mismatch between initial tick box states and communicated switches; ensured they're visible upon launching a game.
2016-06-20 21:31:07 -04:00
Thomas Harte
25a5455d33
Completed bridge interface.
2016-06-20 21:07:01 -04:00
Thomas Harte
fe17d1778c
Expanded 6532 tests substantially, beefing up implementation to match.
2016-06-20 21:02:42 -04:00
Thomas Harte
6c3f5d2caf
Fixed window sizing.
2016-06-19 21:40:35 -04:00
Thomas Harte
4db61d98f4
Killed the .cpp.
2016-06-19 20:21:38 -04:00
Thomas Harte
d5aaad396e
Added a TODO on my lack of knowledge.
2016-06-19 20:13:31 -04:00
Thomas Harte
7cf6008e7c
Started some very basic RIOT unit tests; corrected to pass.
2016-06-19 20:12:47 -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
ce2f5515c0
Made some minor documentation improvements, killed 6522.cpp as the 6522 is going to be a template only, attempting to promote good inlining behaviour.
2016-06-19 18:11:37 -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
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
eea850cd12
Added a deliberately failing data direction test.
2016-06-18 16:40:01 -04:00
Thomas Harte
2282b59768
Added a quick latching test, and shortened test messages, albeit that they're still displeasingly boilerplate.
2016-06-18 16:10:46 -04:00
Thomas Harte
5d26cd85a3
Wrote test case for what appears to be correct timer behaviour if those were acting in isolation. Ensured implementation matches test case.
2016-06-18 14:30:23 -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
06fb2ff1c7
Started endeavouring to sketch out the boilerplate for writing a 6522 test harness. Added a default implementation of synchronise to the 6522 too, since not everybody is going to want one.
2016-06-18 09:28:46 -04:00
Thomas Harte
090e92ad26
Making this large has very limited side effects. So why not?
2016-06-16 21:41:17 -04:00
Thomas Harte
3b71d1a309
Switched to a variable-length buffer based on attempting to hit approximately a certain quality of service.
2016-06-16 21:35:22 -04:00
Thomas Harte
2ee78d42b9
Made an attempt also to trigger updates upon audio packets being returned, and significantly to reduce the size and quantity of those. This should get down to 11ms latency if the output wave is 44100; I might need to scale up the buffer size as the sampling rate increases or this is going to get crazy at 192Khz.
2016-06-16 20:51:35 -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
1921a6c469
Rewired the existing cause-an-update route from the OpenGLView through the best-effort updater.
2016-06-16 18:19:23 -04:00
Thomas Harte
530cf3dcbb
Made an attempt to consolidate serialisation and clock rate adherence, allowing a floating-point clock rate.
2016-06-16 18:04:54 -04:00
Thomas Harte
ce59ad1911
Minor on-disk shuffle, to try to clarify ownership of responsibility.
2016-06-15 08:11:30 -04:00
Thomas Harte
45999f5b26
This should be strong.
2016-06-15 08:07:59 -04:00
Thomas Harte
e0baaf17f1
Added class prefix.
2016-06-15 08:07:25 -04:00
Thomas Harte
695dd2e9e3
Started upon a delegate protocol for the AudioQueue, resolving my use of a deprecated API while I'm at it.
2016-06-15 07:35:34 -04:00
Thomas Harte
a9036e7aa4
Increased buffering range of audio as a quick fix for now. Basically means: increased latency as a short-term fix.
2016-06-14 07:31:47 -04:00
Thomas Harte
fcf4b14344
Extended to allow floating-point sampling rates. Which makes sense.
2016-06-13 19:30:41 -04:00
Thomas Harte
4fec625b19
Minor cleaning, implemented clearAllKeys.
2016-06-12 10:38:21 -04:00
Thomas Harte
ec604f1414
Expanded mapped keys just a tiny bit further.
2016-06-12 10:35:47 -04:00
Thomas Harte
167ed9b8bb
Added enough to load a PRG as a ROM.
2016-06-11 14:00:12 -04:00
Thomas Harte
d9b001d3fc
Minor clean-ups.
2016-06-11 13:51:04 -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
6522530e1c
Actually, I'm dithering over whether the 6522 should be an ordinary class or a curiously-recurring template. But it'll need a file, definitely.
2016-06-06 21:56:02 -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
b29b2a5d08
Added forwarding of a loaded PRG from the Swift document to the wrapper. So I think that possibly completes the Swift side of things?
2016-06-05 09:01:32 -04:00
Thomas Harte
8052ce9223
System ROMs are now supplied to the Vic-20 wrapper, though they stop there. I also factored key forwarding out of the ElectronDocument and into the superclass, depending upon the child conforming to CSKeyboardMachine.
2016-06-05 08:53:05 -04:00
Thomas Harte
363e14a92f
Reorganised system ROMs out of the Mac-specific folder, adjusted Mac code to expect to find them organised hierarchically (as how many os.roms am I going to have?) and added readme files to explain what's missing from the Git repository.
2016-06-05 08:33:01 -04:00
Thomas Harte
4c33517228
Added ROMs to the project and ensured they don't get uploaded.
2016-06-04 22:03:38 -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
06e1db8c85
This now gets as far as missing selectors.
2016-06-04 21:49:03 -04:00
Thomas Harte
eff28e95a4
Added XIB file.
2016-06-04 21:45:39 -04:00
Thomas Harte
404873fe58
Started sketching out infrastructure for Vic-20 support.
2016-06-04 21:43:50 -04:00
Thomas Harte
d6e8cd676a
Trimmed and reordered just a little.
2016-06-04 16:02:16 -04:00
Thomas Harte
68a8851c52
Increased parallelism, allowing a simplification in the GL view.
2016-06-02 22:29:09 -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
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
8623dc2833
Consolidated a little more within the common code, adding sampling rate selection based on querying the machine.
2016-06-01 19:04:07 -04:00
Thomas Harte
50543e9676
Minor factoring up: the audio queue is now pushed universally by MachineDocument.
2016-05-31 22:36:53 -04:00
Thomas Harte
c773c3a66c
Started trying to clean up and consolidate on the Swift side of things but time is up for the day.
2016-05-31 22:32:38 -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
40600b4bcb
Made sprite placement consistent at least. Not necessarily yet correct.
2016-05-18 22:07:24 -04:00
Thomas Harte
3765c5fbb5
Fixed error that would prevent an interrupting frame from ever being drawn.
2016-05-18 21:45:35 -04:00
Thomas Harte
ddfc9910e5
Sought to draw in a standard serial arrangement as and when bandwidth allows it.
2016-05-09 07:17:12 -04:00
Thomas Harte
1bb92550f8
It's 2016.
2016-05-02 22:02:06 -04:00
Thomas Harte
6982e945fb
Fixed those issues breaking GL state, I hope.
2016-05-01 16:17:52 -04:00
Thomas Harte
8538b62ea2
Made an attempt to extract and consolidate the logic behind the intermediate shaders.
2016-04-28 21:04:59 -04:00
Thomas Harte
496d979aca
Made a decision to clean up by creating per-shader classes. Well, more or less. First thing to be factored out: the output shader.
2016-04-27 22:29:54 -04:00
Thomas Harte
416c944f02
Experimental: let's try accumulating history directly in the framebuffer.
2016-04-26 21:41:39 -04:00
Thomas Harte
9b64f64db7
Attempted to normalise some style decisions.`
2016-04-24 22:32:24 -04:00
Thomas Harte
884755c560
Ensured the GL context is available when switching Atari 2600 output, and that it locks the output.
2016-04-24 20:56:21 -04:00
Thomas Harte
d221c712b0
Ensured GL context is active when destructing CRTOpenGL.
2016-04-24 20:34:25 -04:00
Thomas Harte
929cfc49cb
Extended window for picking output frequency, attempted to consolidate CRT OpenGL timing uniforms for approprate resetting.
2016-04-24 18:58:31 -04:00
Thomas Harte
082003ed0a
Reintroduced the CRT delegate and the 2600's automatic region switching. Albeit that the CRT itself doesn't adjust properly to new timings yet.
2016-04-24 18:36:22 -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
9c89b668ae
Made further attempts to improve synchronisation and interrelated timing between display and machine update.
2016-04-20 22:35:46 -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
d5bac2f04f
Spotted error was in texture target all along. This now gets as far as showing something a lot like the correct display, but precision is way off. Way off.
2016-04-18 21:32:48 -04:00
Thomas Harte
86626bbd72
Switched key that maps to FUNC from command to option. Logic is that command may frequently be used for performing an action which changes the key window, in which case we won't realise if it is released.
2016-04-18 19:20:26 -04:00
Thomas Harte
f89308e913
Set the 'options' windows to hide on application deactivation so that they don't cluelessly sit on top of the rest of the system.
2016-04-18 19:14:58 -04:00
Thomas Harte
bf29c8e2bf
Fixed mismatch in television/monitor selection, ticked view for drawing concurrently, since it can, removed stray space.
2016-04-18 19:01:15 -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
6158275ea7
Started adding an options panel.
2016-04-17 21:43:39 -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
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
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
e617bd2bb3
Turned audio quality up to the maximum, at least for now.
2016-04-06 21:12:22 -04:00
Thomas Harte
28e6517234
Switched away from tracking absolute time to tracking relative.
2016-04-06 20:46:00 -04:00
Thomas Harte
d4be4c4769
Of course, I want min. Not max.
2016-04-06 20:27:48 -04:00
Thomas Harte
fd1f6a7e1f
Expanded on thinking.
2016-04-06 19:35:53 -04:00
Thomas Harte
e885438363
The penny has finally dropped that I can drive the CPU stuff in a manner completely decoupled from the GPU stuff. For much improved parallelisation.
2016-04-06 19:34:34 -04:00
Thomas Harte
4595741ab0
Made an attempt not to interrupt the display link queue too much when emulation is running slowly.
2016-04-04 20:22:33 -04:00
Thomas Harte
3038704977
Attempted to introduce a lowpass filter to the graphics output, reverted 6502 optimisations as seemingly not working.
2016-03-21 22:01:25 -04:00
Thomas Harte
5966ac845f
Switched symbols and updated all-RAM 6502 in order to fix unit test target.
2016-03-20 22:48:56 -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
eabc382540
Fixed: of course I can't rely on the pointer to CVTimeStamp not becoming dangling during a queue jump.
2016-03-19 23:02:42 -04:00
Thomas Harte
4c5d66c317
Made sure GL context isn't activated until it's locked.
2016-03-19 22:54:56 -04:00
Thomas Harte
a546277f88
Added the simplest mechanism to decouple emulation from the display link queue.
2016-03-19 22:53:37 -04:00
Thomas Harte
9da7716c72
Attempted to simplify threading, thereby allowing machines to be constructed within a valid GL context, and started adding appropriate GL syncs. Which all oddly drops everything to a negligible FPS. Investigation will follow.
2016-03-19 22:46:17 -04:00
Thomas Harte
4ac1f959e9
A shortcut here and a shortcut there; this allows me at least to determine whether use of a PBO gains anything.
2016-03-19 17:07:05 -04:00
Thomas Harte
4cd0aa3416
Completed FIR filter based audio output.
2016-03-15 23:37:35 -04:00
Thomas Harte
7694297c83
Introduced an adapted version of the previous Clock Signal's FIR filter.
2016-03-15 21:05:20 -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
bb0cd89574
Got explicit about threading guarantees.
2016-03-13 13:38:03 -04:00
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
bf5747f83e
Made an attempt to chop out all the stuff of building up the OpenGL data from the stuff of parsing input.
2016-03-08 22:40:23 -05:00
Thomas Harte
14b2927275
Made further attempts to tidy up; trying to demarcate between public interface and private.
2016-03-08 20:59:16 -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
41c09f8c3f
Renamed CSCathodeRayView to CSOpenGLView as it no longer has any CRT-related responsibilities. It just does the GL and manages a serial dispatch queue.
2016-03-05 14:45:09 -05:00
Thomas Harte
95efeb1d56
Ensured all delegate and responder delegate messages occur on the same queue.
2016-03-05 14:35:47 -05:00
Thomas Harte
c754a6e45a
Decoupled execution speed and frame rate; cleaned up.
2016-03-03 22:12:31 -05:00
Thomas Harte
60d35fa72b
Requested multisampling, if available, rather than supersampling.
2016-02-27 22:46:31 -05:00
Thomas Harte
c7f54d649e
Switched back down to two samples per pixel. Though one might do it. Need to investigate.
2016-02-18 23:21:25 -05:00
Thomas Harte
3ea0d04a1a
-dealloc now blocks until all audio queue buffers are no longer playing.
2016-02-16 21:47:23 -05:00
Thomas Harte
bbffbb5dc2
Resolved deadlock if an invalidate call was sent to the Electron while it was in the middle of an update.
2016-02-16 20:35:45 -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
eeb0e134fd
Started the transition towards a more natural collection of rolling buffers, with phosphor decay in mind.
2016-02-13 20:52:23 -05:00
Thomas Harte
7bc5a43c36
Fixed type warning.
2016-02-12 22:30:22 -05:00
Thomas Harte
0527888b15
Endeavoured to ensure safe shutdown.
2016-02-12 22:30:06 -05:00
Thomas Harte
a6574d1f96
Made an attempt to factor out and more clearly to document my implementation of flywheel synchronisation.
2016-02-11 22:12:12 -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
4d0a218a57
Certainly at least seriously considering a separate holder for the "compile a shader" logic. Otherwise taking steps back towards PAL/NTSC decoding.
2016-02-07 17:32:38 -05:00
Thomas Harte
602327cd9d
Sketched out a quick class for rendering to texture.
2016-02-07 15:42:02 -05:00
Thomas Harte
d3d505b7bc
That's one header file less.
2016-02-05 23:05:58 -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
80e7e5e602
Updated to return old behaviour of drawing only upon changes.
2016-02-04 23:05:47 -05:00
Thomas Harte
8bc3f8046d
This endeavours to move everything into the CRT class except the final version of shader building.
2016-02-04 22:57:46 -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
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
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
f727582911
Started making first moves towards stripping CSCathodeRayView of its responsibilities. If that can be merely an OpenGL view that presents things, things will be a lot more portable.
2016-01-20 08:21:33 -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
90eef1df74
Tightened to provide lower latency audio, hopefully.
2016-01-18 20:01:06 -06:00
Thomas Harte
03f683d588
Gave the audio queue something a lot like a spin lock on waiting to pipe out audio.
2016-01-18 19:57:18 -06:00
Thomas Harte
5a39e42413
Wired up enough such that some basic attempt at parsing a UEF occurs.`
2016-01-18 17:06:09 -06:00
Thomas Harte
2779f0e569
Statred working on support for at least the most fundamental file format.
2016-01-18 15:46:41 -06:00
Thomas Harte
b70fdc2de8
Switched to being explicitly careful about not wrapping around and stomping on data not yet output.
2016-01-18 13:56:20 -06:00
Thomas Harte
ddcc34740b
Added lots of debugging output while I attempt to locate the source of audio scratchiness, also simplified manner of dealing with wraparound within the AudioQueue wrapper.
2016-01-18 13:50:19 -06:00
Thomas Harte
781249acf7
Fixed crash.
2016-01-14 20:35:36 -05:00
Thomas Harte
38ffcaa262
Here, at last, is _some_ audio output, at least.
2016-01-14 20:33:22 -05:00
Thomas Harte
afde8dac49
Closed the loop such that audio manages to bubble up into Objective-C.
2016-01-13 22:38:59 -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
3437781abd
Started sketching out an interface for sound generation. Which made me realise that the CRT in CRTDelegate was redundant, since C++ has namespaces.
2016-01-12 16:54:09 -05:00
Thomas Harte
6112f4ef6b
Withdrew soft filtering for now; until the sampling frequency is passed on it's not sufficiently rigorous.
2016-01-12 16:42:16 -05:00
Thomas Harte
75d6ec354b
Added some very basic filtering in RGB mode.
2016-01-12 16:27:09 -05:00
Thomas Harte
49a36ec9ac
Added F12 as break.
2016-01-11 22:35:52 -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
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
3d6f20b7b9
Output, at last! Though sync is clearly way off.
2016-01-09 21:53:33 -05:00
Thomas Harte
09df218c01
Some output! Showing that three lines of solid sync isn't smart. But here it is.
2016-01-09 21:48:53 -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
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
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
c69b3256ba
Slightly simplified Swift usage.
2016-01-04 23:44:36 -05:00
Thomas Harte
616dc0b57c
Okay, so this is the absolute bare minimum about of refactoring and wiring necessary to get the [unimplemented] Electron machine pumping.
2016-01-04 23:40:43 -05:00
Thomas Harte
43ab8bbad5
Okay, so then here's a first shot at the Objective-C -> C++ bridge for the Electron.
2016-01-04 23:16:37 -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
22fa024546
Added document XIB.
2016-01-03 20:46:39 -05:00
Thomas Harte
aa0714fe27
Started sketching out an Acorn Electron emulation, as it's a platform I'm familiar with and will force me to figure out PAL decoding. Factored out NTSC-specific parts of the display decoding logic and hence added RGB output mode.
2016-01-03 20:41:43 -05:00
Thomas Harte
96503a3ac5
Switched to nicer nullable/nonnull syntax.
2016-01-02 17:59:21 -05:00
Thomas Harte
feeedbe33b
The standard Xcode versioning updates. Nothing of substance.
2016-01-02 17:57:23 -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
5feef2110f
Added a very basic attempt at shadow mask emulation.
2015-09-24 21:23:16 -04:00
Thomas Harte
63b648be65
Switched down to four samples per pixel, just more than half as many, to fit into a vec4. Edges aren't as smooth but I'm wondering whether it'll make much odds when I implement a shadow mask.
2015-09-17 19:25:15 -04:00
Thomas Harte
5d6bee4927
Of course, being in-phase means being the cosine wave.
2015-09-10 21:30:39 -04:00
Thomas Harte
6a0b4e86c8
An Xcode beta version bump, nothing more.
2015-09-05 17:21:36 -04:00
Thomas Harte
53e699516b
Disabled multisampling unless and until I can get the per-pixel cost down.
2015-09-05 17:21:16 -04:00
Thomas Harte
39027b675d
Fixed YIQ conversion and made sampling pattern slightly more rational.
2015-09-05 17:09:24 -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
11acf3f2d3
Made some further minor attempted improvements.
2015-09-02 20:51:56 -04:00
Thomas Harte
161450942a
Removed outdated comment. This is better now than it was.
2015-09-02 17:20:23 -04:00
Thomas Harte
0d6094d842
Attempted very basic vectorisation, plus some minor other clean-ups.
2015-09-02 17:17:22 -04:00
Thomas Harte
f60ba4f487
Added a note about horribleness to the source. You never know who's looking.
2015-09-01 22:38:15 -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
5fe0cff692
Fine. I'll accept 'bin' files if I must.
2015-08-19 21:36:50 -04:00
Thomas Harte
a62c7f5c56
At last! Discovered CRT scanning bug; was always moving by the full proposed run length along the scan, not the time until the next event. Using this, have implemented proper vertical sync at last (I think). Have disabled scanline banding too, as now everything meets up it's more helpful to be able to see with clarity.
2015-08-18 22:22:47 -04:00
Thomas Harte
462a791ed3
Ensured that no backlog accumulates of cycles to run. Otherwise the background queue was lagging behind.
2015-08-18 21:13:54 -04:00
Thomas Harte
ca6b54536e
Added fire and reset inputs.
2015-08-18 20:58:05 -04:00
Thomas Harte
bc805a90fe
Wired up joystick directions, at least, and fire button presses get as far as the C++. But there's some latching to figure out before they'll work.
2015-08-18 20:33:24 -04:00
Thomas Harte
902795d61c
Switched vertical sync detection method, at least for now. They never happen automatically (I need to fix that) and just always take effect if detected in the lower half of the display. PAL/NTSC is determined just by looking at the refresh rate.
2015-08-18 00:17:03 -04:00
Thomas Harte
a693c081f8
Switched on the appropriate compiler warnings re: signed comparisons and implicit conversions. Fixed all less-than-explicit calls.
2015-08-16 16:08:29 -04:00
Thomas Harte
1cc479affd
Removed redundant GL call.
2015-08-16 15:40:03 -04:00
Thomas Harte
391789e75c
Removed stray space.
2015-08-13 23:22:51 +01:00
Thomas Harte
cbe76ea5d5
Got rid of the thread hopping in order to redraw the GL view. Which appears to help significantly with total application cost.
2015-08-13 22:01:25 +01:00
Thomas Harte
cc98534f94
Added test for NOP, discovering the undocumented ones to be the incorrect length.
2015-08-13 07:32:50 +01:00
Thomas Harte
6616265d93
Fixed collision tests, added a few more timing tests.
2015-08-13 03:33:45 +01:00
Thomas Harte
dd0f17130a
Found and fixed some timing errors in absolute indexed and in (indirect), y addressing modes: neither is able in write or read-modify-write modes to shave a cycle as then can when reading.
2015-08-13 02:58:39 +01:00
Thomas Harte
975836c30f
Added a quick snippet test, discovering that I've cut a cycle from read/modify/writes.
2015-08-13 02:18:41 +01:00
Thomas Harte
503d684af0
Added a couple of timing tests, both of which seem to pass for now.
2015-08-13 01:55:23 +01:00
Thomas Harte
e8f70398c1
Added one basic timing test, for now: implied nop should be two cycles.
2015-08-13 01:06:56 +01:00
Thomas Harte
d19f8ed507
Removed the implicit reset upon 6502 startup, adding a reset line. Hence all tests now pass again. Added an empty shell for timing tests, the all-RAM 6502 now counting bus cycles.
2015-08-13 00:51:06 +01:00
Thomas Harte
0e52b7365e
Removed redundant code.
2015-08-10 16:42:25 +01:00
Thomas Harte
eb23a493e5
Switched back to one texel per colour clock, at least for now. Attempted to break _RGBA assumption within the cathode ray view.
2015-08-05 23:36:04 -04:00
Thomas Harte
fd36f13baf
The cathode ray view no longer hard codes the frame size. So that's one less coupling. Doubled pixel output size to give sufficient sampling detail to capture the NTSC colour clock (ummm, hopefully).
2015-08-05 21:45:47 -04:00
Thomas Harte
67e82c713f
Broke assumption that every item in a vertex description is a short, specifically turning lateral into a byte. Which buys me a byte for phase, if that's sufficient.
2015-08-05 21:12:33 -04:00
Thomas Harte
5644b3a1cc
Fixed scanline sizing and fill issues, as well as shortening vsync to the correct Atari length.
2015-08-05 20:55:27 -04:00
Thomas Harte
5313b48ebd
I'm ashamed to admit, I: played with numbers until enough things looked stable such that I can investigate other things. Discovery: my PAL autodetection was way off. Fixed, hopefully.
2015-08-02 20:32:18 -04:00
Thomas Harte
6e52e5df1c
Full separate 'lateral' usage is go. Also probably at some point I need to throw in a phase property, which this new flexibility will help with.
2015-08-02 14:32:29 -04:00
Thomas Harte
3ab6585789
Started making the format of data included in a CRTFrame less a matter of variously hard-coded magic constants. Which will allow me to separate the idea of an internal lateral position from the direct texture coordinate, avoiding precision sampling errors at the top and bottom.
2015-08-02 14:25:21 -04:00
Thomas Harte
be421587ad
Eliminated the vertical retrace counter; vertical retrace ends when the beam gets back to the top.
2015-08-02 13:48:35 -04:00
Thomas Harte
9c91f1a2eb
Added an attempt at NTSC/PAL autodetection, based on number of missed vertical syncs.
2015-07-31 18:04:33 -04:00
Thomas Harte
a5d66e9dd6
Factored out a few more constants, started trying to ensure there's enough slack and the mechanisms in place for the CathodeRayView to hold onto two frames if it desires, for potential phosphor simulation, switched once again to additive blending — much more like a real CRT — and added a sine function across the width of spans per my understanding of how an electron gun actually fires.
...
Why do all this when overall timing is still so far off? It helps me more easily see how overall timing is so far off.
2015-07-31 17:47:10 -04:00
Thomas Harte
53dd5c8f16
Trying to fix my RDY line emulation. Switched to PAL timings, at least temporarily, since it's starting to make a difference.
2015-07-31 16:44:53 -04:00
Thomas Harte
e4615cda2e
Switched back to unrealistic solid raster beams for the time being.
2015-07-30 23:01:59 -04:00
Thomas Harte
cfe758daa0
A tweak here, a tweak there, to help with debugging.
2015-07-30 21:29:40 -04:00
Thomas Harte
20c2d98b9a
Converted remaining spaces to real tabs.
2015-07-30 20:51:32 -04:00
Thomas Harte
98efae2536
Reintroduced emergency vertical sync — so that output occurs even when the emulation isn't catching syncs properly — and switched some spaces to tabs.
2015-07-30 17:16:49 -04:00
Thomas Harte
828ae66a45
It appears ARC extends its reach into C++ nowadays. Fixed additional retain cycle.
2015-07-27 21:17:53 -04:00
Thomas Harte
3c25ead1f3
Started working out some of my retain cycles and general failures to release. Switched .mm filename so that Xcode will stop getting confused when I try to switch between implementation and interface files.
2015-07-27 21:15:10 -04:00
Thomas Harte
1cbebdafcc
This now uploads only a portion of the source buffer if possible. Which is usually possible.
2015-07-27 20:58:51 -04:00
Thomas Harte
1f229ee6f7
More tweaks to provide a stable image, at least for the time being.
2015-07-27 20:18:25 -04:00
Thomas Harte
01109d441b
Made an attempt at NTSC colours. Hard coded in RGB, not composite. Short cuts, tsk.
2015-07-27 19:04:03 -04:00
Thomas Harte
662e7942ac
Enabled multisampling. This is hardly an expensive use case.
2015-07-27 16:57:11 -04:00
Thomas Harte
b9cf6fd4dc
Implemented a virtual skew control, hard coded to what is conveniently exactly the right number.
2015-07-27 16:44:47 -04:00
Thomas Harte
caffe56a2d
Slightly expanded width of cathode ray gun, decided to figure out exactly how to deal with off-by-one lengths and precision at a later date, ensured that failure to catch vertical sync doesn't cause out-of-bounds buffer access on the hard-coded, assumed large enough, 512x512 data textures.
2015-07-27 00:28:47 -04:00
Thomas Harte
65bb31d55b
With around about a thousand issues, not the least of which being sometimes unsafe memory accesses, I've at last got pixels on screen.
2015-07-26 23:50:43 -04:00
Thomas Harte
cd0a62d21e
With a slight tweak to the informal protocol used for 6502 memory access cycles, ensured the wait strobe actually halts the CPU, to give a more accurate linking of machine time to real time.
2015-07-26 15:55:19 -04:00
Thomas Harte
6252f6030f
Switched to idiomatic source name, ensured latest project name is in all appropriate header places, threw texture coordinates slightly into the shader mix.
2015-07-26 15:25:11 -04:00
Thomas Harte
e53fbcf9ea
Reshuffled to make the OpenGL view explicitly a conduit for CRT-style output, and to give it responsibility for frame drawing. Which is still an awkward thread hop for the time being, but I've yet to read up on the advocated approach to multithreading with an NSOpenGLView; it looked like special provisions were available.
2015-07-26 15:13:46 -04:00
Thomas Harte
78a91b67c5
Quickie: make sure the correct context is adjusted; use the intended convertPointToBacking:.
2015-07-24 23:42:19 -04:00
Thomas Harte
ecb2898bd5
The overall architecture of who has responsibility for what is now very askew but: the CRT now outputs a tightly packed short buffer, with the probable OpenGL destination in mind. So it's now all fixed arithmetic internally. CRTFrame is reduced to a plain C struct with the intention that the OpenGL view will take responsibility for it and stop doing the back-and-forth sprint on getting buffer data. The Atari 2600 now outputs explicit blanks rather than level blacks for its border, so that it's easier visually to debug the CRT in its form as far as it has currently progressed: to drawing lines where the cathode ray gun would run while outputting pixel. I note that I'm still not quite getting vertical sync right yet — I'm just accepting it anywhere in teh frame — but that should be an easy fix.
2015-07-24 23:29:45 -04:00
Thomas Harte
5ab47e600a
Got through the requisite amount of invisible pain to get something onto my GL display. But clearly this is factored in entirely the wrong way. Work to do.
2015-07-24 20:37:08 -04:00
