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mirror of https://github.com/TomHarte/CLK.git synced 2024-12-11 15:49:38 +00:00
Commit Graph

390 Commits

Author SHA1 Message Date
Thomas Harte
cfa616d593 Fixed: timing issue versus supplied test ROM was failure to include the Plus 1 ROM in the mix. 2016-03-12 11:51:20 -05:00
Thomas Harte
763d5e8819 Access timing now appears to be exactly on the nail. Disabled automatic interrupt expiration again as I'm not persuaded it's correct for at least the RTC. 2016-03-10 23:12:28 -05:00
Thomas Harte
e305fd9326 Adjusted numbers, empirically. 2016-03-10 22:40:18 -05:00
Thomas Harte
a89225987f Blank lines are back. 2016-03-10 22:19:54 -05:00
Thomas Harte
b836d74e18 Believing the previous implementation to be overly complicated through premature optimisation, simplified video. It's slightly slower now. Will need work. Immediately to do: figure out how to deal with blank scan lines. 2016-03-10 22:08:50 -05:00
Thomas Harte
20ac630e4d Some minor optimisations and timing tweaks. Nothing of substance. 2016-03-10 19:58:50 -05:00
Thomas Harte
df3fff51c7 These interrupts apparently last only 64µs at most. 2016-03-10 19:10:53 -05:00
Thomas Harte
f232a12fad Fixed RAM timings: it's at least two and possibly three cycles to access RAM, and an access that overlaps with video fetch in Modes 0–3 will cost the length of the video fetch rather than somehow finishing in time. 2016-03-10 19:04:43 -05:00
Thomas Harte
c7976dd657 Started trying to clean up my Outputs namespace by moving stuff related to the CRT underneath a separate subnamespace. 2016-03-08 20:49:07 -05:00
Thomas Harte
6dfe877c43 Basic attempts to organise myself into shape for composite output continue. 2016-03-07 21:22:47 -05:00
Thomas Harte
1e5fe2b2c1 Made an attempt to reestablish the Atari 2600 output connection despite various changes (TODO: generalise that stuff), and to start creating the composite shader. 2016-03-07 21:04:04 -05:00
Thomas Harte
cd9c62acca Still stepping slowly towards a working composite mode, switched the RGB sampling function to returning a vec4, which may be of benefit to any machine with a brightness part of an RGB signal, and started edging towards at least having the correct GLSL programs ready for converting composite output. 2016-03-07 19:08:26 -05:00
Thomas Harte
3b6c9c15a1 Switching momentarily back to monitor mode, resolved why I was suddenly getting no output upon creating some texture targets. 2016-03-07 18:55:15 -05:00
Thomas Harte
eefd17ed4c Fixed sync response in composite scan output generation and stored texture coordinates. 2016-03-05 21:52:22 -05:00
Thomas Harte
5c8db71c64 Corrected some constants, ensured both machines (so far) are setting the output device. 2016-03-05 16:19:10 -05:00
Thomas Harte
7839d93344 With the provision of an extra hint to the CRT and, finally, the realisation about why my scans weren't exactly joining up, improved output precision. 2016-02-27 22:39:01 -05:00
Thomas Harte
1c6de7692d Made an attempt to fix tape output interrupts; offloaded raster width and placing conversion to the GPU. 2016-02-27 20:37:41 -05:00
Thomas Harte
db18c85423 Simplified the run builder rather; put a double check of Electron timing in place. 2016-02-25 22:01:42 -05:00
Thomas Harte
1eea28b692 Disabled some debugging parts, added some others, marked some things as inline. Ticking over. 2016-02-22 23:35:42 -05:00
Thomas Harte
ec3cccbb0d Working towards HQ UEF support: fixed bug whereby writing to tape output would reset input pulse stepper; added support for chunk 0116 and approximate support for 0113. 2016-02-20 22:03:14 -05:00
Thomas Harte
3754cf4bce Played about with interrupt timing. 2016-02-20 21:24:02 -05:00
Thomas Harte
574985f9a2 Fixed interlaced timing; switched to a more robust detector for horizontal sync; eliminated some test logging. 2016-02-20 20:29:40 -05:00
Thomas Harte
00f414d757 Made an attempt to reintroduce interlacing and screen modes with gaps. Something's wrong with synchronisation though, so most likely I'm outputting a bad signal. 2016-02-20 17:32:51 -05:00
Thomas Harte
da361be3ee This might be more accurate? Probably not. Who knows? 2016-02-20 00:13:43 -05:00
Thomas Harte
518c134348 Blank lines are missing (if the double negative can be forgiven) but the framebuffer is otherwise seemingly working well again. 2016-02-20 00:11:23 -05:00
Thomas Harte
a3432120f3 Fixed synchronisation — my two fields weren't of equal length, I wasn't breaking calls to the CRT upon 40/80 transitions, I had the wrong maximum run length. Now I just need to put real pixels back in. 2016-02-19 23:57:57 -05:00
Thomas Harte
1954f7bcbd Got back to a stable image, at least when staying in a mode. Which is what I was trying to fix. Hmmm. 2016-02-19 23:41:09 -05:00
Thomas Harte
dce1649fc5 Commuted some camelCase variables into more standard C++ underscore names; decided the best fix for the graphics output is to break it down into much simpler chunks. output_pixels is currently a placeholder that simply outputs blank so the current effect is that all data is missing but it should be easy enough now to put pixels back in. 2016-02-18 23:23:49 -05:00
Thomas Harte
0b5417ab44 Made an attempt to put interrupts in the correct places regardless of even/odd field. 2016-02-16 20:36:19 -05:00
Thomas Harte
a01f90ff3e Attempted a switch to the real PAL visible area and to something a bit like a real phosphor decay. 2016-02-14 21:57:23 -05:00
Thomas Harte
7580d192d5 Fixes: now setting correct frame time estimate, properly enabling the timestamp attribute, and ensuring that the Electron flushes screen work at least once per host frame update. 2016-02-14 19:28:02 -05:00
Thomas Harte
7bd237193d Edged closer towards realistic timing. 2016-02-13 20:52:35 -05:00
Thomas Harte
341fafd3c5 Adjusted visible area. 2016-02-12 19:52:04 -05:00
Thomas Harte
1d20a29d97 Made an attempt to switch to the flywheels for both vertical and horizontal sync, and to act more appropriately for out-of-bounds sync requests. Lots of tweaking to do, I fear. 2016-02-11 23:43:08 -05:00
Thomas Harte
86017de1fb Fixed field timing. It's 312.5 lines now, closer to the PAL standard. 2016-02-11 22:12:37 -05:00
Thomas Harte
c66409421e Switched to generating an interlaced output, that apparently being correct. Enabled a poor man's version of phosphor persistence to smooth things out a little. It's not completely unconvincing. 2016-02-10 23:11:25 -05:00
Thomas Harte
b5bcadb8d3 Reinstated clipped CRT output, with more appropriate ownership of the decision. 2016-02-07 22:18:55 -05:00
Thomas Harte
2e3ba6bbb2 Removed some logging. 2016-02-07 14:42:40 -05:00
Thomas Harte
6ab425deda There is now a semi-reasonable amount of screen output again. 2016-02-05 21:35:39 -05:00
Thomas Harte
e0d51408e4 Onward with carrying this through to the bitter end, this at least results in all the appropriate knowledge and call-ins occuring at the CRT. 2016-02-04 22:28:50 -05:00
Thomas Harte
4554abb755 Made an attempt to be more rigorous in display generation on the Electron, to make sure I deal with mid-line changes to/from blank line mode. Even if it turns out that they generate pixels. 2016-01-29 21:14:13 -05:00
Thomas Harte
adc6838ba0 Continued slow migration of shader ownership to CRT. Attempted to start debugging the tape interface. 2016-01-27 21:35:57 -05:00
Thomas Harte
96c946b8af Made a very basic attempt to emulate tape output. 2016-01-24 18:20:55 -05:00
Thomas Harte
ace331d4b4 Got a bit higher level in CRT timing specification. Which internally allows it now to infer the colour clock frequency. Which will be helpful momentarily. 2016-01-23 18:53:20 -05:00
Thomas Harte
cd97617a8a Bumped the speaker up to the full namespace, since Tape lives there to avoid delegation complexity. Turned the CRT into something the Electron statically owns, fixing a memory leak by simplifying. 2016-01-23 17:45:06 -05:00
Thomas Harte
f4cd0aa38e Ensured that all relevant information is given to the tape class. Made an attempt not to write to a screen output buffer if we don't have one. Added some debug printing. 2016-01-23 13:09:56 -05:00
Thomas Harte
949c33774a Fixed failure to set a delegate, slowed tape speed if operating in RAM. 2016-01-23 11:42:14 -05:00
Thomas Harte
43a7d1b7ae It'll be helpful to be able to isolate the tape interface when I'm faking a fast load. So factored out. 2016-01-23 00:14:44 -05:00
Thomas Harte
0efe4b312c Disabled my various bits of rate interchange debugging; improved test for when to call update_display due to a RAM write. 2016-01-21 22:16:52 -05:00
Thomas Harte
82cb1c365c Further simplified inner loops. 2016-01-21 21:35:04 -05:00
Thomas Harte
34640cec93 Started trying to move some logic out of the inner loop. 2016-01-21 21:28:09 -05:00
Thomas Harte
48ddd3c497 Set about documenting the CRT; while doing so decided to add an optional clock divider for input; having done so decided to try to exploit it with the Electron. 2016-01-21 21:17:47 -05:00
Thomas Harte
de7218cdf0 Added a lot of commenting to the CPU6502 definition, simplifying its construction. Added missing nullability modifier to CSElectron. Fixed bad-habit Objective-C style naming on the Electron's Interrupt enum. 2016-01-20 21:55:38 -05:00
Thomas Harte
4c16d34063 Moved set_tape so that the inline definition of get_next_tape_pulse is visible to it. Also eliminated some dead typedefs. 2016-01-20 08:27:25 -05:00
Thomas Harte
280a2292ff Shushed. 2016-01-19 23:33:15 -05:00
Thomas Harte
9036cf3b7c Thus did the first UEF load. 2016-01-19 23:03:27 -05:00
Thomas Harte
e65cd4cf06 Some data is marginally reaching the CPU from the tape. 2016-01-19 22:05:34 -05:00
Thomas Harte
956b90e203 Attempted further to improve latency; added view adjustment for non-4:3 output aspect ratios. The 4:3 is currently hardcoded, so further work will be required. 2016-01-18 23:55:52 -05:00
Thomas Harte
e63b6d22ae As shown by the commented-out code, the aliasing-adaptation seems to be working. So something is wrong somewhere else. 2016-01-14 21:59:37 -05:00
Thomas Harte
383b2be4c6 Fixed one off-by-one error. 2016-01-14 21:33:27 -05:00
Thomas Harte
8bd04a6be4 Switched model for filter subclasses. Implemented test square[-ish] wave to check for obvious stream errors. None is clear. 2016-01-14 21:27:02 -05:00
Thomas Harte
38ffcaa262 Here, at last, is _some_ audio output, at least. 2016-01-14 20:33:22 -05:00
Thomas Harte
439d452e23 Resolved some errors. 2016-01-13 22:11:33 -05:00
Thomas Harte
49e89a4bcb I'm not yet completely convinced by my approach to time basing, but it'll probably do? If so then this more or less gets me ready for a point-sampled filtering. 2016-01-13 22:02:39 -05:00
Thomas Harte
d9a7ef9e46 Edging towards audio output; the speaker is given appropriate input and output rates, and then updated with current divider and enabled/disabled status. 2016-01-13 21:03:43 -05:00
Thomas Harte
d28abdc037 Made an attempt at correct timing, adding support for additional paged ROMs, added file association for .rom. 2016-01-12 22:34:26 -05:00
Thomas Harte
84ba4e2900 Tidied a little, started working towards supporting speaker output. 2016-01-12 22:19:56 -05:00
Thomas Harte
75d6ec354b Added some very basic filtering in RGB mode. 2016-01-12 16:27:09 -05:00
Thomas Harte
cba09b5490 Switched display update and RAM write order. 2016-01-11 22:29:16 -05:00
Thomas Harte
650077feac Pulled a few things out as constants, zoomed in a little. Still in a 4:3 window though. 2016-01-11 22:18:34 -05:00
Thomas Harte
72019d0ea3 Made an attempt to get video output correct. 2016-01-11 22:08:30 -05:00
Thomas Harte
e93dbdb463 Implemented keyboard input. 2016-01-11 19:48:31 -05:00
Thomas Harte
ce916ebd6a Fixed runaway frame generator. 2016-01-10 23:32:57 -05:00
Thomas Harte
ccf20299a3 Made an attempt at getting some interrupts all up inside this thing. 2016-01-10 19:06:46 -05:00
Thomas Harte
cc5ba8243e Fixed: turned out the power-on bit was being cleared. 2016-01-10 17:17:39 -05:00
Thomas Harte
d95414b2eb I'm not really sure what's going wrong with paging yet but this fixes the 0xc000 byte error. 2016-01-10 12:30:24 -05:00
Thomas Harte
e07981c147 Fixed screen start address. 2016-01-09 22:52:08 -05:00
Thomas Harte
1308332a71 Hard-coded to 40 columns of black and white, here's some text, at least. 2016-01-09 22:39:46 -05:00
Thomas Harte
037602765a This now correctly (I think) decodes information posted to the CRT. But doesn't yet post it correctly. I'm very close now, I hope. 2016-01-09 22:19:00 -05:00
Thomas Harte
07a041d788 Fixed vertical retrace sync. 2016-01-09 21:54:31 -05:00
Thomas Harte
3d6f20b7b9 Output, at last! Though sync is clearly way off. 2016-01-09 21:53:33 -05:00
Thomas Harte
b4f31edea3 Made an attempt to get RGB output mode up and running, and showing at least a box where pixels would be. 2016-01-09 21:32:56 -05:00
Thomas Harte
a900bfed65 Fixed to ensure that frame rendering wraps around, and to properly connect the Electron to its view. Now I need a working pixel shader. 2016-01-09 20:34:22 -05:00
Thomas Harte
7341f5c341 This is intended to be enough to start producing something of an output. But something's obviously still broken. 2016-01-09 20:26:40 -05:00
Thomas Harte
716bb3281b This at least now connects up a CRT, though it never talks to it. 2016-01-07 22:26:49 -05:00
Thomas Harte
47a7654c00 Added just enough that this is probably a successful boot. I guess I'm going to need to get invested in graphics next? Hmmm. 2016-01-07 21:01:13 -05:00
Thomas Harte
8c1bfa5a05 This is the bare minimum to prove that the ROM is trying properly to boot. 2016-01-07 20:36:27 -05:00
Thomas Harte
0db8938d27 Added the option for the CSCathodeRayView to show only a subsection of the full scan area. Zoomed in a little on the 2600. Put in enough piping to give the Electron sight of its ROMs at least. 2016-01-06 23:14:36 -05:00
Thomas Harte
bfd9957c81 You now get an Electron only if you ask for a new file. That'll do for now while it's the only thing that one might want to start without supplying a file. The 6502 now starts from a defined point — being reset. The Electron is starting to grow the absolute most simple buds of its memory map. 2016-01-06 21:09:49 -05:00
Thomas Harte
ab45c1d530 Started working on a shell for the Electron emulation, including factoring out the common CRT delegate -> Objective-C bridging, serial dispatch queue and frameskipping logic from the Atari 2600 shell. 2016-01-04 23:12:47 -05:00