Thomas Harte
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253e5a4203
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With no regard to performance whatsoever, endeavoured to bring sound to the 2600. It's very scratchy, so something is wrong.
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2016-06-02 19:50:16 -04:00 |
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Thomas Harte
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1e0fcbbee8
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Made a very basic stab at a couple of the tone generators, added straight-through path for the speaker when input rate exactly equals output rate.
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2016-06-01 19:53:16 -04:00 |
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Thomas Harte
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40c4544fb7
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Got the basic sound pipeline pumping, just enough for static-level audio seemingly to work. Berzerk VE says "intruder alert, intruder alert", anyway.
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2016-06-01 19:27:04 -04:00 |
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Thomas Harte
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8dc66167be
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Made an attempt to consolidate the Objective-C++ side of things based on the incoming CRTMachine::Machine.
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2016-05-31 22:16:20 -04:00 |
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Thomas Harte
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5c4f35e13f
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Finally started on generalising the C++ stuff so as to be able to be able to get a working audio binding on the OS-specific side without further repetition by factoring an appropriate protocol out from the Electron and sketching out the correct speaker class for the Atari. Added a method to ask it what a good output frequency would be.
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2016-05-31 21:23:44 -04:00 |
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Thomas Harte
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3fc80ea01f
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Rethought, hopefully perfecting, sprite timing.
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2016-05-30 19:56:36 -04:00 |
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Thomas Harte
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8b342f77a9
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Made an attempt further to rationalise timing.
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2016-05-27 21:51:27 -04:00 |
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Thomas Harte
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91d3453cc1
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Switched to looking backwards rather than forwards.
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2016-05-27 14:33:08 -04:00 |
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Thomas Harte
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106ddae907
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Sprites are still a pixel off but better; made some attempt to move things outside of the loop.
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2016-05-25 21:43:19 -04:00 |
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Thomas Harte
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40c2c0bd2d
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Minor simplifications and improvements. Still trying to figure out what's causing the non-linear edge addressing.
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2016-05-25 21:12:25 -04:00 |
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Thomas Harte
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b01b474e36
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I'm back to thinking that resets are deferred but pixel counts are live.
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2016-05-25 07:32:25 -04:00 |
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Thomas Harte
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758806f924
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Introduced a separate queue for pixels, which may or may not be correct.
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2016-05-24 21:39:57 -04:00 |
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Thomas Harte
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0b081831a9
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Set up a pipeline for all pixels that attempts to allow for appropriate delays.
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2016-05-24 07:58:26 -04:00 |
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Thomas Harte
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5c1e594937
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Realised there's a clocking delay on starting horizontal move. Which fixes Coke Zero.
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2016-05-22 21:45:40 -04:00 |
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Thomas Harte
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c3e719c4ab
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Added missile-to-player offsetting. Completing the list of graphics-related TODOs.
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2016-05-22 17:01:56 -04:00 |
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Thomas Harte
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4c6d4d899d
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Ensured that resetting the horizontal timer affects phase.
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2016-05-22 16:29:53 -04:00 |
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Thomas Harte
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df93d7849d
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Re-enabled the ball.
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2016-05-22 14:38:14 -04:00 |
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Thomas Harte
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0242924fb4
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Various bits of caveman debugging appearing and disappearing, switched to latching ball behaviour.
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2016-05-22 14:26:02 -04:00 |
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Thomas Harte
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5e220562e4
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Actually, the four-clock delay, with palette taking effect immediately, appears to be correct. So back to the drawing board on that.
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2016-05-21 21:44:54 -04:00 |
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Thomas Harte
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4eded9b9d0
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Re-enabled collisions.
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2016-05-21 13:05:36 -04:00 |
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Thomas Harte
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b1c84f5402
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Counters run every scan line regardless of blank and sync. Also played further with timing.
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2016-05-21 12:54:39 -04:00 |
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Thomas Harte
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470c90428a
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Switched to two-register implementation of VDELP, etc.
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2016-05-21 10:26:27 -04:00 |
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Thomas Harte
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36d19cb6cf
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Made an attempt at properly pumping timers during hmove.
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2016-05-21 10:18:15 -04:00 |
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Thomas Harte
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a952813036
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Fixed missile sizes, played about with ball placement.
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2016-05-19 18:30:17 -04:00 |
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Thomas Harte
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cf5b8ab92e
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This is now approximately back to where it was on Cosmic Ark.
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2016-05-19 08:30:10 -04:00 |
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Thomas Harte
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40600b4bcb
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Made sprite placement consistent at least. Not necessarily yet correct.
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2016-05-18 22:07:24 -04:00 |
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Thomas Harte
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e61392d3fb
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Fixed incorrect duplication.
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2016-05-18 21:50:28 -04:00 |
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Thomas Harte
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8c7ce1ec3f
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Attempted to fix sprite sizing and, again, missile repetition.
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2016-05-18 21:41:25 -04:00 |
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Thomas Harte
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d013d46337
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Fixed object motion decoding and checking of the repeat mask for missile graphics.
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2016-05-18 21:36:28 -04:00 |
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Thomas Harte
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83ed6a82cf
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Fixed: asserting vertical blank doesn't affect underlying timing.
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2016-05-18 18:49:40 -04:00 |
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Thomas Harte
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877c55b5c5
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Threw in missiles. To 'complete' graphics output. Or, rather, to move me on to debugging.
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2016-05-18 07:54:44 -04:00 |
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Thomas Harte
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354143a78c
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Reintroduced an attempt to plot sprites.
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2016-05-18 07:51:25 -04:00 |
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Thomas Harte
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0b99649b0f
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Had a first shot at triggering player and missile resets.
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2016-05-18 07:31:05 -04:00 |
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Thomas Harte
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b8708b805c
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The vertical blank flag now works again.
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2016-05-17 22:02:57 -04:00 |
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Thomas Harte
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a1e63e8320
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Attempted to generalise on pixel counter storage, at least. Further adjusted background timing but I'm still not sure.
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2016-05-17 21:41:32 -04:00 |
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Thomas Harte
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ad6f405483
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Fixed: was off by one on pixels, allowing four extra pixel output cycles per line.
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2016-05-17 19:02:32 -04:00 |
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Thomas Harte
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c96674b341
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Made genuine first approximate attempt at hmove.
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2016-05-17 18:35:40 -04:00 |
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Thomas Harte
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d170bb14e6
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Extended scheduling plans, inserted initial events for hmove, albeit not yet implemented.
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2016-05-17 18:21:49 -04:00 |
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Thomas Harte
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6a961c4d28
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Added something of the ball counter, but without yet a working HMOVE it's prone to error.
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2016-05-17 07:18:14 -04:00 |
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Thomas Harte
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7d3cf76576
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Generalised slightly, to allow events to be queued up to eight cycles in advance; most importantly each event gets to pick its own delay.
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2016-05-17 07:09:18 -04:00 |
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Thomas Harte
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3d003070b3
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Made an attempt better to generalise the idea of things with 4 CLK delays.
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2016-05-16 21:54:27 -04:00 |
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Thomas Harte
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4ad074fc78
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Introduced a four-cycle delay between playfield fetch and display, curing Yar's Revenge. Also disabled barrel roll scanling colouring again. I really need to make my mind up on that.
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2016-05-16 19:55:56 -04:00 |
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Thomas Harte
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f19ed2e8f8
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Started merely attempting to reintroduce the background layer.
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2016-05-16 19:04:13 -04:00 |
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Thomas Harte
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9d92ad659f
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Established the basic timing loop, albeit without clocking delays yet.
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2016-05-16 08:01:29 -04:00 |
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Thomas Harte
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cca53598d3
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Made another run at 2600 colours.
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2016-05-14 16:52:24 -04:00 |
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Thomas Harte
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8d52765f40
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Realised why new shaders weren't taking. Very negligibly decreased Atari drawing cost.
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2016-05-12 22:22:24 -04:00 |
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Thomas Harte
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6d65bc9b3a
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Permitted a wider error window on vertical sync, tidied things up a little and started trying to move towards full implementation of the OpenGL contract.
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2016-05-11 22:11:01 -04:00 |
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Thomas Harte
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4b3c4082d2
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These functions appear correctly to model the NTSC and PAL palettes; the CRT's attempt to switch function doesn't work properly yet though.
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2016-05-11 21:07:18 -04:00 |
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Thomas Harte
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5a4262d74e
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Confirmed: it is inaccurate for a 6502 to self reset at power up. So that responsibility now rests in the machines.
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2016-05-10 21:05:52 -04:00 |
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Thomas Harte
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1142c86811
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Slightly simplified conditional.
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2016-05-07 18:38:51 -04:00 |
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