Thomas Harte
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8c9062857c
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Added a single-slot queue for player objects to defer drawing, thereby deferring pixel lookup. Which I think is correct. Though more slots might be needed.
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2017-02-25 17:10:24 -05:00 |
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Thomas Harte
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77ed4ddc05
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Slightly simplified ready line release logic.
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2017-02-23 21:08:32 -05:00 |
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Thomas Harte
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82f392fada
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This should be the other way around. I want whichever is later.
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2017-02-22 21:54:49 -05:00 |
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Thomas Harte
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8291a63d5f
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Fixed loss of audio when switching to PAL.
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2017-02-22 21:15:37 -05:00 |
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Thomas Harte
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6120dae61a
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While I'm using the hacky approach to player/missile synchronisation, I need to seed adder.
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2017-02-22 07:39:11 -05:00 |
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Thomas Harte
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4f5f191cd6
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Fixed: will no longer attempt to output pixels from before the pixel part of a line on which sync was disabled abruptly.
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2017-02-22 07:33:36 -05:00 |
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Thomas Harte
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21abf4e9fc
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Enshrined a terminology switch, albeit without any flow change behind it.
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2017-02-22 07:29:48 -05:00 |
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Thomas Harte
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144d6b70d9
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Minor cleaning.
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2017-02-22 07:14:30 -05:00 |
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Thomas Harte
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b769f22ca0
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Switched back to the collision_buffer_ being part of the TIA object, added one more assert.
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2017-02-21 22:26:20 -05:00 |
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Thomas Harte
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7019d396d0
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Threw in some asserts, discovering a bug in missile positioning.
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2017-02-21 22:04:27 -05:00 |
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Thomas Harte
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f4447fd9cd
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Attempted to fix failure of sprites properly to wrap when performing motion.
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2017-02-21 21:53:09 -05:00 |
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Thomas Harte
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36396b3d62
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Made a slightly better, albeit still inaccurate, version of missile-player lock.Enough for Combat to do reasonable things.
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2017-02-21 20:45:20 -05:00 |
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Thomas Harte
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d1dbf8c21f
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Missile to player lock is supposed to be a toggle; also factored out the commonalities of missile and ball drawing.
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2017-02-21 07:58:37 -05:00 |
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Thomas Harte
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1bde0fed6f
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Simplified relationship between Objects and the usage-specific components through inheritance.
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2017-02-21 07:37:20 -05:00 |
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Thomas Harte
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7ab2358bba
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Made an attempt to reintroduce missiles.
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2017-02-20 22:22:39 -05:00 |
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Thomas Harte
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99547181f1
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Attempted to template this thing. Without yet a plan in place for pixel lookup timing.
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2017-02-20 21:42:59 -05:00 |
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Thomas Harte
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2bf784535c
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Simplified calllng.
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2017-02-20 18:04:40 -05:00 |
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Thomas Harte
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57f434c199
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Reorganised state, with an eye towards unifying object motion and triggers.
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2017-02-20 17:58:28 -05:00 |
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Thomas Harte
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99a35266e1
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Attempted to bring frequency-switching logic into the cross-platform realm. Which for now creates an issue with the OpenGL context.
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2017-02-19 21:20:37 -05:00 |
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Thomas Harte
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51bcaea60c
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Disabled incorrect 'optimisations'.
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2017-02-19 12:00:04 -05:00 |
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Thomas Harte
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e00339ef0a
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Attempted to reintroduce the ball.
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2017-02-19 08:02:54 -05:00 |
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Thomas Harte
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53cd125712
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Added stub calls to draw the missiles and ball.
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2017-02-19 07:28:24 -05:00 |
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Thomas Harte
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04693b067c
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Fixed failure of the optimised route to pump the pixel clock; removed optimisation entirely for now.
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2017-02-18 21:36:48 -05:00 |
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Thomas Harte
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cd7876a746
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Reintroduced the extra clocking delay.
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2017-02-18 20:18:50 -05:00 |
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Thomas Harte
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ed5ff49ef5
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Fixed vertical delay, retreated from my previous thought about adding the one extra cycle of sprite delay, at least temporarily.
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2017-02-16 20:52:01 -05:00 |
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Thomas Harte
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8d502a0b03
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Decided not to run before I can walk and switched to storing the motion time and next step explicitly per object.
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2017-02-16 20:28:37 -05:00 |
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Thomas Harte
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5ea232310f
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Added a check against negative runs.
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2017-02-16 18:55:58 -05:00 |
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Thomas Harte
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09309aa74f
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Attempted to prevent extraneous moves.
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2017-02-16 18:52:39 -05:00 |
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Thomas Harte
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b5357860b9
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Made an attempt to split things apart so as to be able to introduce the proper sprite latency.
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2017-02-14 20:56:16 -05:00 |
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Thomas Harte
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cd90118a0f
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Added two, extraordinarily simple tests.
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2017-02-12 20:32:53 -05:00 |
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Thomas Harte
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25776de59d
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I think unit testing this thing is the only way forwards. Started adding appropriate hooks.
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2017-02-12 19:55:02 -05:00 |
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Thomas Harte
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600bdc9af7
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In C++, I think the implicit cast to bool negates the need for any manual collapsing?
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2017-02-12 18:18:35 -05:00 |
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Thomas Harte
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0c9be2b09e
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Shunted the collisions buffer onto a separate area of the heap for the time being, as a debugging aid. Also added a few more initial values.
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2017-02-12 18:16:50 -05:00 |
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Thomas Harte
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df8a5cbe6d
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Made attempts (i) to respect the delay flag; and (ii) to account for border-region sprite clocking.
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2017-02-12 17:35:09 -05:00 |
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Thomas Harte
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9ce68c38ae
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Made an effort to implement proper pixel output for sprites.
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2017-02-12 14:01:50 -05:00 |
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Thomas Harte
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40954d6a2a
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Attempted to factor out parts I expect to reuse for missiles and the ball.
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2017-02-12 11:31:17 -05:00 |
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Thomas Harte
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ac444a3f34
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Corrected both position increments and target time calculation.
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2017-02-11 21:24:14 -05:00 |
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Thomas Harte
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b8abeced6d
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Made an attempt to introduce the proper eventful loop for player output. With debugging yet to occur.
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2017-02-11 21:01:58 -05:00 |
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Thomas Harte
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aeff59addc
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Implemented motion 'correctly', for programs written to do all work outside of the pixel area.
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2017-02-11 20:25:49 -05:00 |
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Thomas Harte
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aff69dbc34
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Resolved spurious static analyser issue; screen mode will always be 0–6 but it doesn't know that. Setting a non-zero divider doesn't feel worth worrying about for a cleaner compile.
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2017-02-11 13:35:22 -05:00 |
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Thomas Harte
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6381e4e1b0
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All that's happened to position is that numbers have been added to it. So it can't be negative, given that it wasn't before. So a regular modulo will do.
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2017-02-11 13:34:36 -05:00 |
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Thomas Harte
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905ed1f87b
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Switched to the more natural type, which is also signed, making my logic less prone to error.
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2017-02-11 13:16:53 -05:00 |
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Thomas Harte
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8de6caf6ff
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Started trying to get into a proper structure here. Chickened out.
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2017-02-11 12:59:13 -05:00 |
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Thomas Harte
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40d3f5f7f6
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Attempted properly to respect start.
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2017-02-11 08:26:09 -05:00 |
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Thomas Harte
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64d5712d1d
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Added an incorrectly-coded version of horizontal move, at least so that I can verify that information is going into the correct slots.
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2017-02-10 07:23:43 -05:00 |
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Thomas Harte
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3b20d862f0
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Made an initial attempt to mark sprite positions. But without hmove implemented, they're all over the place.
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2017-02-09 20:53:42 -05:00 |
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Thomas Harte
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2e9ef2b0ef
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Took a shot at reinstating the horizontal blank extend flag.
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2017-02-09 18:37:19 -05:00 |
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Thomas Harte
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70745286a5
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Ensured this array is properly aligned for the uin32_t accesses I intend to make for background drawing.
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2017-02-08 20:25:23 -05:00 |
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Thomas Harte
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dcb7584060
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Added the four-cycle playfield output latency and ensured you can't get smaller-than-usual pixels by rapid register value changing.
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2017-02-08 07:30:32 -05:00 |
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Thomas Harte
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a477499724
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Got a bit more explicit with range returned by get_cycles_until_horizontal_blank and hence attempted a more thorough (/correct) version of WSYNC.
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2017-02-07 22:14:45 -05:00 |
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Thomas Harte
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944d835eea
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Switched explicitly to an accumulation model for filling the collision buffer.
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2017-02-06 21:59:28 -05:00 |
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Thomas Harte
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8f5039130c
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Changed index naming order to ensure no out-of-bounds accesses.
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2017-02-06 21:48:41 -05:00 |
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Thomas Harte
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ba165bb70a
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Made an attempt properly to populate collision registers from the collision buffer.
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2017-02-06 21:15:55 -05:00 |
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Thomas Harte
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474e2e8d2c
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Fixed once again to respect mid-line palette changes.
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2017-02-06 20:09:12 -05:00 |
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Thomas Harte
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8b8eb787df
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Fixed complete invisibility.
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2017-02-06 18:42:58 -05:00 |
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Thomas Harte
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66bcdd36f3
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Made an attempt to introduce an intermediate buffer that ends up with a bit mask of all graphical components present on it, and to use that to infer collision flags and colours, based on playfield priority and colour palette. Immediately yielding: a blank screen. Good work!
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2017-02-06 18:29:00 -05:00 |
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Thomas Harte
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6bcf95042c
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Started trying to be a bit more explicit about usage, and to divide up drawing responsibility.
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2017-02-05 17:51:56 -05:00 |
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Thomas Harte
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f2437cb257
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Added some additional documentation, started making steps towards returning sprites, fixed a counter bug that would exhibit as incorrect sync.
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2017-01-31 20:30:32 -05:00 |
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Thomas Harte
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abe04334c2
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Attempted to retain more player information, and removed the output cursor from class storage as I think it's acceptable as a temporary.
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2017-01-30 22:42:27 -05:00 |
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Thomas Harte
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8545707b54
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Reinstituted the playfield. Probably needs more buffering though. Time to look into delays.
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2017-01-30 21:38:58 -05:00 |
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Thomas Harte
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2b08758b2b
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Started capturing playfield/ball and background colours.
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2017-01-30 08:08:03 -05:00 |
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Thomas Harte
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764b528891
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Made a first attempt at switching to a model that respects blank and sync.
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2017-01-30 07:19:19 -05:00 |
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Thomas Harte
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92754ace7a
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Some mild fixes get me up to having a rolling screen of vertical lines. Which is what I was hoping for right now!
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2017-01-29 22:16:23 -05:00 |
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Thomas Harte
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d51f185dc7
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Made an attempt to reintroduce the basic horizontal loop.
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2017-01-29 15:43:57 -05:00 |
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Thomas Harte
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2390358c24
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Prevented unbounded CPU usage, albeit without yet deciding who has authority for the clock rate.
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2017-01-29 14:19:26 -05:00 |
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Thomas Harte
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2432a3b4d7
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Fixed condition — >= is smarter.
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2017-01-29 14:00:01 -05:00 |
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Thomas Harte
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9c3597c7e3
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Attempted to reintroduce enough logic to handle [most of] line timing, such that WSYNC works. Initial objective is to get back to having a working background.
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2017-01-29 13:47:36 -05:00 |
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Thomas Harte
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fba6baaa9c
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Stubbed and disabled to get back to building.
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2017-01-28 21:56:01 -05:00 |
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Thomas Harte
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a246530953
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Supposing the TIA were implemented, this is (more or less) what the Atari 2600 would now look like.
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2017-01-28 21:46:40 -05:00 |
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Thomas Harte
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0ffded72a6
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Created a placeholder class for a factored-out TIA. There's a bit more it'll need to do, like vending (or receiving) a CRT but this is the full hardware stuff, I think.
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2017-01-28 16:19:08 -05:00 |
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Thomas Harte
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6d087ca054
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Restored 2600 audio.
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2017-01-25 21:29:19 -05:00 |
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Thomas Harte
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be1cb2a551
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Fixed NTSC phase.
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2017-01-11 21:31:24 -05:00 |
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Thomas Harte
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6153ada33b
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Fixed Electron's support for automatically booting floppy disks.
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2017-01-08 14:46:19 -05:00 |
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Thomas Harte
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8cd1575891
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Similar fix to that over in Oric land: ensure a known, effective initial value for the Plus 3's control register.
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2016-12-28 18:52:36 -05:00 |
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Thomas Harte
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90151e2094
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Fixed to ensure a known initial control register value, which has taken effect.
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2016-12-28 18:49:32 -05:00 |
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Thomas Harte
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a568172758
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Made steps towards proper CRC generation. Am currently comparing against Oric disk images, as — amongst other things — they include precomputed CRCs.
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2016-12-28 18:29:37 -05:00 |
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Thomas Harte
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4fca30b81f
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Made the Plus 3 less chatty, documented invalidate_track.
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2016-12-25 21:06:58 -05:00 |
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Thomas Harte
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3805e3d17d
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Ensured base address is set properly at construction.
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2016-12-22 22:46:02 -05:00 |
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Thomas Harte
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63107cd492
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Tidied, very slightly.
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2016-12-15 19:49:25 -05:00 |
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Thomas Harte
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a555c5762a
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Rearranged code, hopefully into a more logical grouping.
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2016-12-15 19:47:04 -05:00 |
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Thomas Harte
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4a7ddaf2e9
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Added documentation and a quick note to self.
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2016-12-15 19:43:04 -05:00 |
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Thomas Harte
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f61176cd7d
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Reinstituted something of the don't-do-pixel-work-until-an-affecting-write-occurs optimisation.
|
2016-12-15 19:20:14 -05:00 |
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Thomas Harte
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c1c70a767a
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Attempted fully to reinstate proper timing.
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2016-12-15 18:52:16 -05:00 |
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Thomas Harte
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0326316bb8
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Reinstated whole-frame counting. Thereby to reinstate proper interrupts.
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2016-12-15 18:09:49 -05:00 |
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Thomas Harte
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b58b11fc93
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Switched to a table-based dispatch of line-by-line actions, primarily to simplify.
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2016-12-15 18:07:46 -05:00 |
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Thomas Harte
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fd541e1142
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An early draft; dealing with the issue that not all cycles are necessarily consumed in a single call. Incomplete; broken. Committing for cross-machine visibility.
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2016-12-12 08:01:10 -05:00 |
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Thomas Harte
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be7e05e109
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Started attempting to move total responsibility for display-related interrupts and RAM timing into the video.
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2016-12-11 18:34:49 -05:00 |
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Thomas Harte
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c5cf8d9531
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Ensured the video subsystem correctly handles requests to run over a frame boundary.
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2016-12-11 16:17:51 -05:00 |
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Thomas Harte
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52028432e1
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Restored some semblance of output.
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2016-12-10 22:19:10 -05:00 |
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Thomas Harte
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0aae1bd1ef
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Fixed calculation of termination cycle.
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2016-12-10 21:35:41 -05:00 |
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Thomas Harte
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c43e481a33
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Started factoring video out of the Electron.
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2016-12-10 21:07:52 -05:00 |
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Thomas Harte
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e62be03673
|
Removed endianness assumption.
|
2016-12-10 19:10:33 -05:00 |
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Thomas Harte
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a5683dfb21
|
Removed now untrue comment.
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2016-12-10 15:19:48 -05:00 |
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Thomas Harte
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0e71802b92
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Reduced Oric video to single nibble constants. Removed attempt at asynchronous flush as no longer required.
|
2016-12-10 14:17:46 -05:00 |
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Thomas Harte
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580f347727
|
Fixed Oric SCART mode by having it change what it's giving to the CRT based on which shader it knows will be active.
|
2016-12-10 13:55:56 -05:00 |
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Thomas Harte
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a549fd1ecc
|
Introduced the ability simply to piggy-back off the CRT's natural phase for the colour burst, thereby eliminating a couple of redundant independent attempts in the Oric and Electron.
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2016-12-10 13:42:34 -05:00 |
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Thomas Harte
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6cdd41e5a9
|
Added direct use of the colour ROM, uploading 16 bits per pixel to contain the entire ROM composite wave.
|
2016-12-09 22:17:10 -05:00 |
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Thomas Harte
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3b5962b171
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This is an initial attempt at using the actual Oric colour ROM values for composite video generation.
|
2016-12-09 20:01:27 -05:00 |
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Thomas Harte
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c304db0f5a
|
Deintegrated the busy flag and the interrupt request line, as the latter is reset by status reads. Which also means I can start reporting the WD INTRQ line status directly from the Microdisc. That appears to be correct, rather than honouring the Microdisc IRQ select there.
|
2016-12-06 21:16:29 -05:00 |
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Thomas Harte
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ebb62a2d78
|
Switched the 2600 to postfix and non-camel-case instance variable names.
|
2016-12-03 14:07:38 -05:00 |
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