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
