Thomas Harte
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1c4acfb599
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I think this is a prima facie acceptable implementation of the fast tape hack.
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2016-03-13 17:39:53 -04:00 |
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Thomas Harte
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4462bb92f8
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Moved interrupt back down to where it's probably meant to be.
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2016-03-12 23:18:46 -05:00 |
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Thomas Harte
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cdff90f20d
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Fixed: setting an interrupt control value with the lowest bit set could result in interrupts that can't be disabled.
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2016-03-12 22:55:33 -05:00 |
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Thomas Harte
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6327311130
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Made an attempt to separate and clarify on tape interrupts.
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2016-03-12 20:32:26 -05:00 |
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Thomas Harte
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cfa616d593
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Fixed: timing issue versus supplied test ROM was failure to include the Plus 1 ROM in the mix.
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2016-03-12 11:51:20 -05:00 |
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Thomas Harte
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763d5e8819
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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.
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2016-03-10 23:12:28 -05:00 |
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Thomas Harte
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e305fd9326
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Adjusted numbers, empirically.
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2016-03-10 22:40:18 -05:00 |
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Thomas Harte
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a89225987f
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Blank lines are back.
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2016-03-10 22:19:54 -05:00 |
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Thomas Harte
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b836d74e18
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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.
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2016-03-10 22:08:50 -05:00 |
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Thomas Harte
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20ac630e4d
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Some minor optimisations and timing tweaks. Nothing of substance.
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2016-03-10 19:58:50 -05:00 |
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Thomas Harte
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df3fff51c7
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These interrupts apparently last only 64µs at most.
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2016-03-10 19:10:53 -05:00 |
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Thomas Harte
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f232a12fad
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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.
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2016-03-10 19:04:43 -05:00 |
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Thomas Harte
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c7976dd657
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Started trying to clean up my Outputs namespace by moving stuff related to the CRT underneath a separate subnamespace.
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2016-03-08 20:49:07 -05:00 |
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Thomas Harte
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6dfe877c43
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Basic attempts to organise myself into shape for composite output continue.
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2016-03-07 21:22:47 -05:00 |
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Thomas Harte
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1e5fe2b2c1
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Made an attempt to reestablish the Atari 2600 output connection despite various changes (TODO: generalise that stuff), and to start creating the composite shader.
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2016-03-07 21:04:04 -05:00 |
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Thomas Harte
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cd9c62acca
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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.
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2016-03-07 19:08:26 -05:00 |
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Thomas Harte
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3b6c9c15a1
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Switching momentarily back to monitor mode, resolved why I was suddenly getting no output upon creating some texture targets.
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2016-03-07 18:55:15 -05:00 |
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Thomas Harte
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eefd17ed4c
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Fixed sync response in composite scan output generation and stored texture coordinates.
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2016-03-05 21:52:22 -05:00 |
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Thomas Harte
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5c8db71c64
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Corrected some constants, ensured both machines (so far) are setting the output device.
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2016-03-05 16:19:10 -05:00 |
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Thomas Harte
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7839d93344
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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.
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2016-02-27 22:39:01 -05:00 |
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Thomas Harte
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1c6de7692d
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Made an attempt to fix tape output interrupts; offloaded raster width and placing conversion to the GPU.
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2016-02-27 20:37:41 -05:00 |
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Thomas Harte
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db18c85423
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Simplified the run builder rather; put a double check of Electron timing in place.
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2016-02-25 22:01:42 -05:00 |
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Thomas Harte
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1eea28b692
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Disabled some debugging parts, added some others, marked some things as inline. Ticking over.
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2016-02-22 23:35:42 -05:00 |
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Thomas Harte
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ec3cccbb0d
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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.
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2016-02-20 22:03:14 -05:00 |
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Thomas Harte
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3754cf4bce
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Played about with interrupt timing.
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2016-02-20 21:24:02 -05:00 |
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Thomas Harte
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574985f9a2
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Fixed interlaced timing; switched to a more robust detector for horizontal sync; eliminated some test logging.
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2016-02-20 20:29:40 -05:00 |
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Thomas Harte
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00f414d757
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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.
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2016-02-20 17:32:51 -05:00 |
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Thomas Harte
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da361be3ee
|
This might be more accurate? Probably not. Who knows?
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2016-02-20 00:13:43 -05:00 |
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Thomas Harte
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518c134348
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Blank lines are missing (if the double negative can be forgiven) but the framebuffer is otherwise seemingly working well again.
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2016-02-20 00:11:23 -05:00 |
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Thomas Harte
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a3432120f3
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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.
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2016-02-19 23:57:57 -05:00 |
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Thomas Harte
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1954f7bcbd
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Got back to a stable image, at least when staying in a mode. Which is what I was trying to fix. Hmmm.
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2016-02-19 23:41:09 -05:00 |
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Thomas Harte
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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.
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2016-02-18 23:23:49 -05:00 |
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Thomas Harte
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0b5417ab44
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Made an attempt to put interrupts in the correct places regardless of even/odd field.
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2016-02-16 20:36:19 -05:00 |
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Thomas Harte
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a01f90ff3e
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Attempted a switch to the real PAL visible area and to something a bit like a real phosphor decay.
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2016-02-14 21:57:23 -05:00 |
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Thomas Harte
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7580d192d5
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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.
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2016-02-14 19:28:02 -05:00 |
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Thomas Harte
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7bd237193d
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Edged closer towards realistic timing.
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2016-02-13 20:52:35 -05:00 |
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Thomas Harte
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341fafd3c5
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Adjusted visible area.
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2016-02-12 19:52:04 -05:00 |
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Thomas Harte
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1d20a29d97
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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.
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2016-02-11 23:43:08 -05:00 |
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Thomas Harte
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86017de1fb
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Fixed field timing. It's 312.5 lines now, closer to the PAL standard.
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2016-02-11 22:12:37 -05:00 |
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Thomas Harte
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c66409421e
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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.
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2016-02-10 23:11:25 -05:00 |
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Thomas Harte
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b5bcadb8d3
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Reinstated clipped CRT output, with more appropriate ownership of the decision.
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2016-02-07 22:18:55 -05:00 |
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Thomas Harte
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2e3ba6bbb2
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Removed some logging.
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2016-02-07 14:42:40 -05:00 |
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Thomas Harte
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6ab425deda
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There is now a semi-reasonable amount of screen output again.
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2016-02-05 21:35:39 -05:00 |
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Thomas Harte
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e0d51408e4
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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.
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2016-02-04 22:28:50 -05:00 |
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Thomas Harte
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4554abb755
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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.
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2016-01-29 21:14:13 -05:00 |
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Thomas Harte
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adc6838ba0
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Continued slow migration of shader ownership to CRT. Attempted to start debugging the tape interface.
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2016-01-27 21:35:57 -05:00 |
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Thomas Harte
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96c946b8af
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Made a very basic attempt to emulate tape output.
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2016-01-24 18:20:55 -05:00 |
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Thomas Harte
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ace331d4b4
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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.
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2016-01-23 18:53:20 -05:00 |
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Thomas Harte
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cd97617a8a
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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.
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2016-01-23 17:45:06 -05:00 |
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Thomas Harte
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f4cd0aa38e
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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.
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2016-01-23 13:09:56 -05:00 |
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Thomas Harte
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949c33774a
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Fixed failure to set a delegate, slowed tape speed if operating in RAM.
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2016-01-23 11:42:14 -05:00 |
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Thomas Harte
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43a7d1b7ae
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It'll be helpful to be able to isolate the tape interface when I'm faking a fast load. So factored out.
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2016-01-23 00:14:44 -05:00 |
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Thomas Harte
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0efe4b312c
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Disabled my various bits of rate interchange debugging; improved test for when to call update_display due to a RAM write.
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2016-01-21 22:16:52 -05:00 |
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Thomas Harte
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82cb1c365c
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Further simplified inner loops.
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2016-01-21 21:35:04 -05:00 |
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Thomas Harte
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34640cec93
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Started trying to move some logic out of the inner loop.
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2016-01-21 21:28:09 -05:00 |
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Thomas Harte
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48ddd3c497
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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.
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2016-01-21 21:17:47 -05:00 |
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Thomas Harte
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de7218cdf0
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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.
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2016-01-20 21:55:38 -05:00 |
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Thomas Harte
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4c16d34063
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Moved set_tape so that the inline definition of get_next_tape_pulse is visible to it. Also eliminated some dead typedefs.
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2016-01-20 08:27:25 -05:00 |
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Thomas Harte
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280a2292ff
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Shushed.
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2016-01-19 23:33:15 -05:00 |
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Thomas Harte
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9036cf3b7c
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Thus did the first UEF load.
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2016-01-19 23:03:27 -05:00 |
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Thomas Harte
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e65cd4cf06
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Some data is marginally reaching the CPU from the tape.
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2016-01-19 22:05:34 -05:00 |
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Thomas Harte
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956b90e203
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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.
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2016-01-18 23:55:52 -05:00 |
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Thomas Harte
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e63b6d22ae
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As shown by the commented-out code, the aliasing-adaptation seems to be working. So something is wrong somewhere else.
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2016-01-14 21:59:37 -05:00 |
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Thomas Harte
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383b2be4c6
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Fixed one off-by-one error.
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2016-01-14 21:33:27 -05:00 |
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Thomas Harte
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8bd04a6be4
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Switched model for filter subclasses. Implemented test square[-ish] wave to check for obvious stream errors. None is clear.
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2016-01-14 21:27:02 -05:00 |
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Thomas Harte
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38ffcaa262
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Here, at last, is _some_ audio output, at least.
|
2016-01-14 20:33:22 -05:00 |
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Thomas Harte
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439d452e23
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Resolved some errors.
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2016-01-13 22:11:33 -05:00 |
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Thomas Harte
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49e89a4bcb
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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.
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2016-01-13 22:02:39 -05:00 |
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Thomas Harte
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d9a7ef9e46
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Edging towards audio output; the speaker is given appropriate input and output rates, and then updated with current divider and enabled/disabled status.
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2016-01-13 21:03:43 -05:00 |
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Thomas Harte
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d28abdc037
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Made an attempt at correct timing, adding support for additional paged ROMs, added file association for .rom.
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2016-01-12 22:34:26 -05:00 |
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Thomas Harte
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84ba4e2900
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Tidied a little, started working towards supporting speaker output.
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2016-01-12 22:19:56 -05:00 |
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Thomas Harte
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75d6ec354b
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Added some very basic filtering in RGB mode.
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2016-01-12 16:27:09 -05:00 |
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Thomas Harte
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cba09b5490
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Switched display update and RAM write order.
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2016-01-11 22:29:16 -05:00 |
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Thomas Harte
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650077feac
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Pulled a few things out as constants, zoomed in a little. Still in a 4:3 window though.
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2016-01-11 22:18:34 -05:00 |
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Thomas Harte
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72019d0ea3
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Made an attempt to get video output correct.
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2016-01-11 22:08:30 -05:00 |
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Thomas Harte
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e93dbdb463
|
Implemented keyboard input.
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2016-01-11 19:48:31 -05:00 |
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Thomas Harte
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ce916ebd6a
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Fixed runaway frame generator.
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2016-01-10 23:32:57 -05:00 |
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Thomas Harte
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ccf20299a3
|
Made an attempt at getting some interrupts all up inside this thing.
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2016-01-10 19:06:46 -05:00 |
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Thomas Harte
|
cc5ba8243e
|
Fixed: turned out the power-on bit was being cleared.
|
2016-01-10 17:17:39 -05:00 |
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Thomas Harte
|
d95414b2eb
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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 |
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Thomas Harte
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e07981c147
|
Fixed screen start address.
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2016-01-09 22:52:08 -05:00 |
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Thomas Harte
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1308332a71
|
Hard-coded to 40 columns of black and white, here's some text, at least.
|
2016-01-09 22:39:46 -05:00 |
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Thomas Harte
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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 |
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Thomas Harte
|
07a041d788
|
Fixed vertical retrace sync.
|
2016-01-09 21:54:31 -05:00 |
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Thomas Harte
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3d6f20b7b9
|
Output, at last! Though sync is clearly way off.
|
2016-01-09 21:53:33 -05:00 |
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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 |
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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 |
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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 |
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Thomas Harte
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716bb3281b
|
This at least now connects up a CRT, though it never talks to it.
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2016-01-07 22:26:49 -05:00 |
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Thomas Harte
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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 |
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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 |
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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.
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2016-01-06 23:14:36 -05:00 |
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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.
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2016-01-06 21:09:49 -05:00 |
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Thomas Harte
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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 |
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