Thomas Harte
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161450942a
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Removed outdated comment. This is better now than it was.
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2015-09-02 17:20:23 -04:00 |
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Thomas Harte
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0d6094d842
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Attempted very basic vectorisation, plus some minor other clean-ups.
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2015-09-02 17:17:22 -04:00 |
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Thomas Harte
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f60ba4f487
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Added a note about horribleness to the source. You never know who's looking.
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2015-09-01 22:38:15 -04:00 |
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Thomas Harte
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cb6e6e8acb
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It's the worst fragment shader you'll ever see. The worst. But this attempts NTSC composite video emulation, artefacts included.
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2015-09-01 22:36:45 -04:00 |
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Thomas Harte
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5fe0cff692
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Fine. I'll accept 'bin' files if I must.
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2015-08-19 21:36:50 -04:00 |
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Thomas Harte
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043d2f9896
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It sounds like the two sync signals are exclusive ORd.
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2015-08-19 21:36:33 -04:00 |
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Thomas Harte
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3c3c4d2f7c
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Enlarged drawing range a little.
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2015-08-19 21:35:26 -04:00 |
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Thomas Harte
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c5e480cfae
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Threw in missile repeats.
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2015-08-19 09:46:57 -04:00 |
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Thomas Harte
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28fad66272
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Okay, so I had those constants transposed. What a klutz I've been!
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2015-08-19 09:09:00 -04:00 |
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Thomas Harte
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f74d9ee373
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Copied in quote. So that I can stop looking it up.
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2015-08-18 22:36:32 -04:00 |
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Thomas Harte
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a62c7f5c56
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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.
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2015-08-18 22:22:47 -04:00 |
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Thomas Harte
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462a791ed3
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Ensured that no backlog accumulates of cycles to run. Otherwise the background queue was lagging behind.
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2015-08-18 21:13:54 -04:00 |
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Thomas Harte
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ca6b54536e
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Added fire and reset inputs.
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2015-08-18 20:58:05 -04:00 |
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Thomas Harte
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88d5064737
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Not that it makes a lot of difference, there being no names to mangle, but moved the closing #ifdef __cplusplus to the idiomatic place.
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2015-08-18 20:33:59 -04:00 |
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Thomas Harte
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bc805a90fe
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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.
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2015-08-18 20:33:24 -04:00 |
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Thomas Harte
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902795d61c
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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.
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2015-08-18 00:17:03 -04:00 |
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Thomas Harte
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d21ccddeef
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Fixed: _vBlankExtend is now cleared at the correct moment.
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2015-08-17 17:54:36 -04:00 |
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Thomas Harte
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a33d31d02a
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Fixed to allow loading of ROMs less than 1kb in size.
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2015-08-17 00:34:01 -04:00 |
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Thomas Harte
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083b678785
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Quickie: observed that the initial position is one scanline dirty, not zero. Also switched to a size_t on the write pointer, size_t being the correct C size for into-memory offsets.
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2015-08-17 00:25:32 -04:00 |
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Thomas Harte
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df68aeff5a
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Fixed: made sure that _vBlankExtend resets itself even on non-pixel lines.
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2015-08-17 00:09:28 -04:00 |
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Thomas Harte
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414849f166
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Confirmed: pixel counters are not paused by programmatic vertical blank.
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2015-08-16 17:34:20 -04:00 |
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Thomas Harte
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cde9bb7ebc
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Put common shift step into a macro.
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2015-08-16 16:12:20 -04:00 |
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Thomas Harte
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a693c081f8
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Switched on the appropriate compiler warnings re: signed comparisons and implicit conversions. Fixed all less-than-explicit calls.
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2015-08-16 16:08:29 -04:00 |
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Thomas Harte
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1cc479affd
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Removed redundant GL call.
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2015-08-16 15:40:03 -04:00 |
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Thomas Harte
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410c09cb35
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Made attempt not to touch the _collisions registers (which are instance variables) unless the local variables imply it's potentially necessary. So that's a broad phase on collisions, I guess.
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2015-08-16 15:39:40 -04:00 |
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Thomas Harte
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40cb1cf60d
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... and the ball graphic.
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2015-08-16 11:24:33 -04:00 |
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Thomas Harte
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afaa86a649
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Minor thing: skip the internal counter stuff if we're definitely going to end up with a transparent pixel anyway for the player and missile graphics.
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2015-08-16 11:23:46 -04:00 |
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Thomas Harte
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4b5aabdd54
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Attempted to take even more out of the inner pixel loop.
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2015-08-13 23:23:04 +01:00 |
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Thomas Harte
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391789e75c
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Removed stray space.
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2015-08-13 23:22:51 +01:00 |
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Thomas Harte
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cbe76ea5d5
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Got rid of the thread hopping in order to redraw the GL view. Which appears to help significantly with total application cost.
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2015-08-13 22:01:25 +01:00 |
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Thomas Harte
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92c7d56cc3
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Tiny little speed improvement. Every little helps.
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2015-08-13 21:50:24 +01:00 |
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Thomas Harte
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17bbe27c9a
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As an experiment, performed some very basic moving of playfield composition outside of the pixel loop.
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2015-08-13 21:32:22 +01:00 |
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Thomas Harte
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033655835a
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My understanding now is that object position counting will begin the cycle after the call is made, not that cycle, and that the timer loops just once, with the logic for counter pumping being whether the relevant flag is still set, irregardless of whether the counter is still going.
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2015-08-13 18:59:23 +01:00 |
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Thomas Harte
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b440fed323
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Fixed a couple of incorrect references to horizontal constants or calculations where the intention is to use vertical.
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2015-08-13 18:29:07 +01:00 |
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Thomas Harte
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323aa27e13
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Fixed: paging is based directly on the access, independent of the read/write line (since it isn't actually exposed to catridges).
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2015-08-13 15:04:30 +01:00 |
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Thomas Harte
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59c872ada6
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Attempted to reintroduce suitably noted emergency flyback. To re-enable auto-selection of PAL.
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2015-08-13 14:55:53 +01:00 |
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Thomas Harte
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9838e01cc1
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Made a first attempt at paging.
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2015-08-13 13:24:02 +01:00 |
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Thomas Harte
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9ca57b80a7
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Minor steps to help with diagnostics; all commented out or merely to benefit with breakpoint placement.
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2015-08-13 08:43:10 +01:00 |
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Thomas Harte
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cc98534f94
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Added test for NOP, discovering the undocumented ones to be the incorrect length.
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2015-08-13 07:32:50 +01:00 |
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Thomas Harte
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6616265d93
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Fixed collision tests, added a few more timing tests.
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2015-08-13 03:33:45 +01:00 |
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Thomas Harte
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dd0f17130a
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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.
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2015-08-13 02:58:39 +01:00 |
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Thomas Harte
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975836c30f
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Added a quick snippet test, discovering that I've cut a cycle from read/modify/writes.
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2015-08-13 02:18:41 +01:00 |
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Thomas Harte
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503d684af0
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Added a couple of timing tests, both of which seem to pass for now.
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2015-08-13 01:55:23 +01:00 |
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Thomas Harte
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e8f70398c1
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Added one basic timing test, for now: implied nop should be two cycles.
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2015-08-13 01:06:56 +01:00 |
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Thomas Harte
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d19f8ed507
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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.
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2015-08-13 00:51:06 +01:00 |
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Thomas Harte
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687816d470
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Made some attempted simplifications, implemented collisions.
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2015-08-13 00:31:57 +01:00 |
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Thomas Harte
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aebf636528
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Ensured the PIA timer resumes its normal tick rate after being read; fixed those spaces that had crept in where tabs should be.
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2015-08-10 16:55:16 +01:00 |
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Thomas Harte
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42677f5f83
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Fixed association of motion registers and actual registers.
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2015-08-10 16:43:45 +01:00 |
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Thomas Harte
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0e52b7365e
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Removed redundant code.
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2015-08-10 16:42:25 +01:00 |
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Thomas Harte
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2dde2efff0
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Attempted to standardise object counters.
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2015-08-10 15:09:40 +01:00 |
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