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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3437781abd
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Started sketching out an interface for sound generation. Which made me realise that the CRT in CRTDelegate was redundant, since C++ has namespaces.
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2016-01-12 16:54:09 -05:00 |
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Thomas Harte
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6112f4ef6b
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Withdrew soft filtering for now; until the sampling frequency is passed on it's not sufficiently rigorous.
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2016-01-12 16:42:16 -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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49a36ec9ac
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Added F12 as break.
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2016-01-11 22:35:52 -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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93f7df04a0
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Ensured correctly timed sampling of the interrupt line.
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2016-01-10 22:55:56 -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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09df218c01
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Some output! Showing that three lines of solid sync isn't smart. But here it is.
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2016-01-09 21:48:53 -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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c69b3256ba
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Slightly simplified Swift usage.
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2016-01-04 23:44:36 -05:00 |
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Thomas Harte
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616dc0b57c
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Okay, so this is the absolute bare minimum about of refactoring and wiring necessary to get the [unimplemented] Electron machine pumping.
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2016-01-04 23:40:43 -05:00 |
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Thomas Harte
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43ab8bbad5
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Okay, so then here's a first shot at the Objective-C -> C++ bridge for the Electron.
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2016-01-04 23:16:37 -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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Thomas Harte
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22fa024546
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Added document XIB.
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2016-01-03 20:46:39 -05:00 |
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Thomas Harte
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aa0714fe27
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Started sketching out an Acorn Electron emulation, as it's a platform I'm familiar with and will force me to figure out PAL decoding. Factored out NTSC-specific parts of the display decoding logic and hence added RGB output mode.
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2016-01-03 20:41:43 -05:00 |
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Thomas Harte
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96503a3ac5
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Switched to nicer nullable/nonnull syntax.
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2016-01-02 17:59:21 -05:00 |
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Thomas Harte
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feeedbe33b
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The standard Xcode versioning updates. Nothing of substance.
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2016-01-02 17:57:23 -05:00 |
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Thomas Harte
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675070c5dd
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Very, _very_ minor: switched to normal C++ constructor syntax for simple variable initialisation.
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2015-12-06 16:53:37 -05:00 |
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Thomas Harte
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5feef2110f
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Added a very basic attempt at shadow mask emulation.
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2015-09-24 21:23:16 -04:00 |
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Thomas Harte
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63b648be65
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Switched down to four samples per pixel, just more than half as many, to fit into a vec4. Edges aren't as smooth but I'm wondering whether it'll make much odds when I implement a shadow mask.
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2015-09-17 19:25:15 -04:00 |
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Thomas Harte
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5d6bee4927
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Of course, being in-phase means being the cosine wave.
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2015-09-10 21:30:39 -04:00 |
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Thomas Harte
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82aa6d074a
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'type' is out, at least for the time being.
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2015-09-05 20:25:30 -04:00 |
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Thomas Harte
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6a0b4e86c8
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An Xcode beta version bump, nothing more.
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2015-09-05 17:21:36 -04:00 |
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Thomas Harte
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53e699516b
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Disabled multisampling unless and until I can get the per-pixel cost down.
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2015-09-05 17:21:16 -04:00 |
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Thomas Harte
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7fb6c86d9d
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Okay, it looks like colour 3 is approximately phase offset 0, and the palette wraps around after 14 entries, not 16. Also got a bit less dependent on floating point accuracy for the step.
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2015-09-05 17:10:41 -04:00 |
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Thomas Harte
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39027b675d
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Fixed YIQ conversion and made sampling pattern slightly more rational.
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2015-09-05 17:09:24 -04:00 |
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Thomas Harte
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80cf3d9301
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Formally gave the 2600 responsibility for providing the code that decodes one of the things it has put into a buffer into a composite sample.
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2015-09-03 12:28:16 -04:00 |
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