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
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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
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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.
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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
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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
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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
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cc5ba8243e
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Fixed: turned out the power-on bit was being cleared.
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2016-01-10 17:17:39 -05:00 |
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Thomas Harte
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d95414b2eb
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I'm not really sure what's going wrong with paging yet but this fixes the 0xc000 byte error.
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2016-01-10 12:30:24 -05:00 |
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Thomas Harte
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e07981c147
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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
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Hard-coded to 40 columns of black and white, here's some text, at least.
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2016-01-09 22:39:46 -05:00 |
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Thomas Harte
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037602765a
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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.
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2016-01-09 22:19:00 -05:00 |
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Thomas Harte
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07a041d788
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Fixed vertical retrace sync.
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2016-01-09 21:54:31 -05:00 |
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Thomas Harte
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3d6f20b7b9
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Output, at last! Though sync is clearly way off.
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2016-01-09 21:53:33 -05:00 |
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Thomas Harte
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b4f31edea3
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Made an attempt to get RGB output mode up and running, and showing at least a box where pixels would be.
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2016-01-09 21:32:56 -05:00 |
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Thomas Harte
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a900bfed65
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Fixed to ensure that frame rendering wraps around, and to properly connect the Electron to its view. Now I need a working pixel shader.
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2016-01-09 20:34:22 -05:00 |
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Thomas Harte
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7341f5c341
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This is intended to be enough to start producing something of an output. But something's obviously still broken.
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2016-01-09 20:26:40 -05:00 |
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Thomas Harte
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716bb3281b
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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
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Added just enough that this is probably a successful boot. I guess I'm going to need to get invested in graphics next? Hmmm.
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2016-01-07 21:01:13 -05:00 |
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Thomas Harte
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8c1bfa5a05
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This is the bare minimum to prove that the ROM is trying properly to boot.
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2016-01-07 20:36:27 -05:00 |
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Thomas Harte
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0db8938d27
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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
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bfd9957c81
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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
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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.
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2016-01-04 23:12:47 -05:00 |
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