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1,682 Commits 8 Branches 121 Tags 496 MiB
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604 Commits

Author SHA1 Message Date
Thomas Harte
ca2dc6b6c4 Ensured ROMs survive in the new memory model. 2016-08-15 19:56:01 -04:00
Thomas Harte
38aec44d85 Made sufficient changes for the Vic itself to believe it can recast a PRG as a tape and insert it that way. So now the ball is in the court of: how the heck are Commodore tapes encoded? 2016-08-15 19:44:41 -04:00
Thomas Harte
547aefb696 Slightly adjusted PRG strategy, made a note about where next. 2016-08-14 16:36:42 -04:00
Thomas Harte
d9016909ed Added some wiring for PAL/NTSC mode switching on the Vic, making an attempt to simplify the whole loop of having different clock rates. 2016-08-14 13:33:20 -04:00
Thomas Harte
a547b7e1d8 Took basic steps towards supporting memory expansions. 2016-08-13 17:21:25 -04:00
Thomas Harte
142774be37 Collapsed 6560 template to a more direct loop, albeit with quite a bit still left to fix. 2016-08-09 21:10:53 -04:00
Thomas Harte
12bad8f23f Turned the 6560 into an ordinary template, similar to the rest of the project, albeit right now with a fairly shonky internal implementation. Fixed a Mac-specific interface sizing issue. 2016-08-09 20:41:05 -04:00
Thomas Harte
285a288c80 Switched to two cycles of options loading, meaning that they get set before files are inserted. Might need some further work? 2016-08-07 21:48:09 -04:00
Thomas Harte
be54d8040e Made a first stab at having automatic loading be optional. But things are currently arranged such that the machine options are communicated too late to have an effect. So work to do. 2016-08-06 17:39:27 -04:00
Thomas Harte
3e65450a54 Converted the 6560 fully into a template; worked on allowing the typer to run at a much faster rate where hardware has some trigger by which it can request the next key. 2016-08-06 14:33:24 -04:00
Thomas Harte
d832e5e10d Reduced 1540 PLL to running at 4Mhz. Which is possibly correct (?) Made minor change to avoid divide if possible. 2016-08-02 21:28:50 -04:00
Thomas Harte
5d40d70c92 Fixed 6560 addressing error, added an autotyper for Vic disks (more work potentially needed), fixed semantics for testing whether a 6502 is about to reset. 2016-08-01 10:32:32 -04:00
Thomas Harte
bc10b3ee9a It appears the problem is as simple as sectors being counted from zero. 2016-08-01 10:08:38 -04:00
Thomas Harte
f5e4ea3351 Some minor tidying, lots more of the caveman stuff as I try to determine what I'm doing wrong. 2016-08-01 09:43:08 -04:00
Thomas Harte
18744cd98b Slightly updated comments, switched to 1540 ROM so as very slightly to improve loading time. 2016-08-01 04:37:30 -04:00
Thomas Harte
b43a7381ae Fixed framing and first-byte-after-sync signalling. Hacked together as parts of it are, loading now appears to work! 2016-08-01 04:25:11 -04:00
Thomas Harte
41893b5ef6 Put in the absolute minimum logic for drive motor emulation. Drive appears to be attempting head steps. 2016-07-31 19:38:51 -04:00
Thomas Harte
740ea0b7e2 Added overflow-flag setting logic and ensured disk ROM gets through regardless of ROM/disk installation order. 2016-07-31 19:33:18 -04:00
Thomas Harte
0945049cd3 Made attempt to connect sync detect and then apply appropriate windowing, posting bytes to the appropriate place. 2016-07-31 18:29:44 -04:00
Thomas Harte
198fbbedc7 Reeled back all appropriate pieces of caveman debugging. 2016-07-31 13:42:34 -04:00
Thomas Harte
2332f72875 Formalised clock-rate multiplication within disk drives, discovered that the stepper didn't have ideal behaviour for my timed event loop and hence nailed down the semantics a ilttle more. 
(obiter: the 1540 now appears to discern the correct sequence of bits. Framing is off in my test printfs but that's neither here nor there).
 2016-07-31 13:32:30 -04:00
Thomas Harte
8f62211f5e Wired up the 1540 as a PLL delegate. Which prima facie means it should start receiving a bit stream. Except that I clearly have something in the timing way off — either my flux transitions are far too short or I need to significantly increase the clock rate on the PLL. 2016-07-29 12:08:18 -04:00
Thomas Harte
89a1881fef Started turning the 1540 into an actual disk drive. 2016-07-29 11:03:09 -04:00
Thomas Harte
ada2f073e0 Completed handing of the disk all the way to the 1540. 2016-07-10 16:24:46 -04:00
Thomas Harte
6cfc514c2d Made the rote changes necessary to attempt to open and to supply a G64 to the Vic. 2016-07-10 12:57:17 -04:00
Thomas Harte
4ca6883f7c Disabled attachment of a 1540 again, as I probably need to move to opening an actual disk image next. 2016-07-10 08:03:36 -04:00
Thomas Harte
824d9ea92b Added further comments. 2016-07-10 08:01:16 -04:00
Thomas Harte
d8334edf4a Started trying to clean up, including commuting the C1540 source file name to match its class name but mainly by adding documentation. 2016-07-10 07:46:20 -04:00
Thomas Harte
c0ab45a73d Disabled a bunch of the caveman debug logging. 2016-07-09 22:29:11 -04:00
Thomas Harte
f589d639db Okay, so it seems that sync also works the other way around. 2016-07-09 22:25:44 -04:00
Thomas Harte
693c8b2438 After all that, it seems likely that inputs just aren't inverted for the Vic. 2016-07-09 20:03:38 -04:00
Thomas Harte
656cd211d7 Was transmitting bit levels backwards (probably?); 1540 now acknowledges byte received. 2016-07-09 18:06:49 -04:00
Thomas Harte
7cc4bf3fe7 Hit and hope is getting me nowhere. Time to unit test this thing. 2016-07-09 15:40:25 -04:00
Thomas Harte
8827597363 Messier and messier, but I've at least attempted to implement hardware attention acknowledge. 2016-07-08 19:00:39 -04:00
Thomas Harte
9a08ef61cb Still fumbling in the margins: made an effort not to imply that the 1540 is forever reading syncs. 2016-07-07 22:13:18 -04:00
Thomas Harte
199c0e27e0 Mostly just random guesses now, to be honest. It's approaching the end of my window for the morning. 2016-07-07 07:16:36 -04:00
Thomas Harte
81e6cc34e5 Per the ROM disassembly, the Vic's VIA outputs are inverted for the benefit of the serial bus. 2016-07-07 06:57:21 -04:00
Thomas Harte
c9479f923b The inversion of truth was clearly just a problematic API. Got explicit. LineLevel might need to become more pervasive. 2016-07-07 06:44:13 -04:00
Thomas Harte
dcb86a027a Okay, so the 1540 doesn't toggle the actual attention line. I don't know what it does yet but this helps. 2016-07-06 22:31:14 -04:00
Thomas Harte
1baf21827c Since the ROM is well disassembled, let's actually try to be a 1541 first. 2016-07-06 22:17:32 -04:00
Thomas Harte
4f174786b5 Fixed potential buffer overrun. 2016-07-06 21:39:09 -04:00
Thomas Harte
f64cd8cfcb Quick fixes properly to declare the DriveVIA, to ensure its interrupts take effect, and to wire ATN IN to CA1 rather than CB2. 2016-07-06 20:22:46 -04:00
Thomas Harte
428fcdb978 Centralised and improved serial logging. 2016-07-06 07:46:21 -04:00
Thomas Harte
8819711bc8 Threw in the second VIA as a currently clearly incorrect thing. 2016-07-05 22:22:09 -04:00
Thomas Harte
93c2bb80a2 Improved a comment, added independent C[A/B]2 input mode. 2016-07-05 21:11:51 -04:00
Thomas Harte
6c4fa4ec5d Improved commenting and initial state communication. 2016-07-05 20:57:31 -04:00
Thomas Harte
1e6d90de17 Made an attempt properly to deal with initial bus state. 2016-07-05 20:52:33 -04:00
Thomas Harte
c3b7d24293 It appears that the attention line is also wired to CB2. So the ball is back in the 6522's court. 2016-07-05 19:19:46 -04:00
Thomas Harte
11fc43aa04 Made an attempt to allow the 1540 to talk back to the Vic, and to receive interrupts. Also slightly disambiguated debugging logging. 2016-07-05 19:12:43 -04:00
Thomas Harte
d16b79073e Further fleshing out: added a serial port for the serial bus. 2016-07-05 17:27:02 -04:00
Thomas Harte
d1eea6943d Ensured the 1540 ROM gets installed, at least. 2016-07-05 16:54:25 -04:00
Thomas Harte
86dabd007b Furthered fleshing out of the 1540. Though it doesn't yet receive a ROM so won't even attempt to do anything meaningful. 2016-07-05 16:39:18 -04:00
Thomas Harte
a25fcc7190 Made a first attempt at wiring back serial port input. 2016-07-05 16:10:54 -04:00
Thomas Harte
d2cded7b59 Attempted to separate out the concept of a serial port and a serial bus, since the bus may be shared, and to establish half duplex communications from the Vic. 2016-07-05 14:55:20 -04:00
Thomas Harte
0d3d0fbe4d Created a namespace for Commodore and an empty container file for the 1540[/1] implementation. 2016-07-05 13:28:27 -04:00
Thomas Harte
97751a9d86 Took the preliminary steps necessary to wire up a serial port. 2016-07-05 10:55:47 -04:00
Thomas Harte
a49f2b41cc Added C++ side of things. I think. 2016-07-04 21:48:25 -04:00
Thomas Harte
8db44eed3e Added a default implementation of Speaker::skip_samples. 2016-07-04 20:48:27 -04:00
Thomas Harte
bfa237397d Settled on assigning to nullptr as the appropriate style for emptying shared_ptrs; fixed the Vic properly to release its output resources. 2016-07-04 20:34:11 -04:00
Thomas Harte
88964ceac0 Eliminated plain pointer passing for object types. 2016-07-04 19:33:55 -04:00
Thomas Harte
82b0bc9b58 Discovered that this is another meaningful usage of using. 2016-07-04 19:10:10 -04:00
Thomas Harte
7e5b631e30 Cut some dead code. 2016-07-01 19:02:29 -04:00
Thomas Harte
7fa010a463 Attempted to add support for the most basic of control line output, and slightly to optimise the Vic. 2016-07-01 19:01:22 -04:00
Thomas Harte
ed8f4d0476 Added some minor additional bits of documentation. 2016-06-30 08:46:29 -04:00
Thomas Harte
0182b0483a Added a 'power on' flag that is set automatically at construction but can be declined. Saves all that stuff of every machine having to set and then unset the RST line, and fixes an Electron bug related to that. 2016-06-29 19:13:24 -04:00
Thomas Harte
6027cba95f Factored out the stuff of pushing a fast-loading option onwards and storing it within the user defaults. 2016-06-27 21:38:14 -04:00
Thomas Harte
e3e6bbb785 Removed the colon again, until I can educate myself a little further. 2016-06-26 21:38:03 -04:00
Thomas Harte
69d78dfdb3 Removed logging. 2016-06-26 21:36:26 -04:00
Thomas Harte
1439ca0580 Added a quick automatic issuing of the 'LOAD' command. 2016-06-26 21:34:37 -04:00
Thomas Harte
843d1fdca7 Added some extra logging while trying to determine what's going on; added interrupt clearing for the control lines. 2016-06-26 21:30:06 -04:00
Thomas Harte
2a2c3da5d4 Added hardwired tape present bit. 2016-06-26 19:50:49 -04:00
Thomas Harte
c306d705e1 Made a quick first attempt at all-the-way-through tape wiring for the Vic. 2016-06-26 19:43:09 -04:00
Thomas Harte
37ba42a52f Factored out the stuff of playing a tape, started basic sketch of the Vic-related classes. 2016-06-26 19:03:57 -04:00
Thomas Harte
d5e50f5ea0 Got a bit more explicit about how ports are identified on the 6522. 2016-06-26 12:30:01 -04:00
Thomas Harte
8d9eb30d82 So it sounds like the user-port VIA might actually be connected to NMI? 2016-06-25 16:31:35 -04:00
Thomas Harte
8741be5c84 Made the slightest possible effort to get TAPs opened and passed to the VIC. 2016-06-25 16:24:52 -04:00
Thomas Harte
2bd71e7e9b .reset is the more normal way to reassign a unique_ptr. 2016-06-23 20:52:44 -04:00
Thomas Harte
e05003c176 Discovered that the VIC and the VIAs can be simultaneously selected. Adjusted bus appropriately. 2016-06-22 17:34:42 -04:00
Thomas Harte
454e98302d Slight rearrangement plus a setting of the CSMachine delegate corrects audio after a clock rate change. 2016-06-20 22:18:41 -04:00
Thomas Harte
31b26b8118 Made a first attempt to implement the full top-to-bottom change of clock rates, giving the Atari the ability to change rate when it switches to PAL mode, as it should always have been. 2016-06-20 21:47:27 -04:00
Thomas Harte
88e2b382e5 Made an attempt at a full and thorough 6532 implementation (and got a bit more explicit about flag size in the 6502). 2016-06-20 18:57:35 -04:00
Thomas Harte
b6dd38dad3 Corrected type safety warning. 2016-06-19 21:41:01 -04:00
Thomas Harte
065ec618c4 Factored out and templated the 6532, finally taking the opportunity to add a means to control the on-console switches of an Atari 2600. 2016-06-19 19:36:34 -04:00
Thomas Harte
65413f078c Factored out the 6532, eventually to make it testable. 2016-06-19 18:57:40 -04:00
Thomas Harte
6dd8ea67c9 Tested and trimmed delay on typing if resetting. 2016-06-19 17:27:23 -04:00
Thomas Harte
05cb47709e Implemented Utility::Typer for the Electron. So that now also receives pastes. 2016-06-19 17:25:35 -04:00
Thomas Harte
ef3ed1f436 Implemented full paste ability for any machine that is a typer. 2016-06-19 16:35:04 -04:00
Thomas Harte
3fc472d5cb Expanded typing to include phase for machines that need to go through multiple keypresses to reach a certain state, expanded Vic to be able to type most things (still bodged on lowercase though), and to schedule a 'run' if it's supposed to be loading into RAM, spotting that opportunity actually to do so. 2016-06-19 13:46:53 -04:00
Thomas Harte
e7aeed2f03 Established a general pattern for machines that can type things. Started working on the Vic typing itself. 2016-06-19 13:10:52 -04:00
Thomas Harte
f4915c5ad6 Fixed test and added basic implementation of data direction. 2016-06-18 17:17:03 -04:00
Thomas Harte
394902f409 Switched to clocking the 6522 by the half-cycle. Very trivial test now passes. 2016-06-18 13:57:10 -04:00
Thomas Harte
595791cee0 Made the base 6522 class more abstract: you must now opt-in if you want the IRQ line to be sent to a delegate. 2016-06-18 08:51:18 -04:00
Thomas Harte
00a9f1bf24 Fixed best-effort updater actually to run, finally moved clock rate announcement into the C++ side of things, started working on a mechanism to allow clock rate to be updated. 2016-06-16 20:39:46 -04:00
Thomas Harte
fdc854c0c2 Fixed tone channels; made an attempt at loading PRGs that are supposed to go into RAM. 2016-06-13 21:49:59 -04:00
Thomas Harte
5fc36b956c Attempted most basic sketching of a container for Vic audio. 2016-06-13 19:30:52 -04:00
Thomas Harte
4190b42bbb No need for these to live separately, I think. 2016-06-13 18:27:18 -04:00
Thomas Harte
19b2f46488 Fixed accesses to colour memory. 2016-06-12 11:06:19 -04:00
Thomas Harte
4fec625b19 Minor cleaning, implemented clearAllKeys. 2016-06-12 10:38:21 -04:00
Thomas Harte
167ed9b8bb Added enough to load a PRG as a ROM. 2016-06-11 14:00:12 -04:00
Thomas Harte
3e8d383615 Improved key map. Possibly enough to type some basic BASIC? 2016-06-11 13:19:59 -04:00
Thomas Harte
d1731b1d26 Hacked my 6522 to work. Mistake is in not returning output as input when appropriate — i.e. that I'm ignoring data direction. Also fixed K and L keys. 2016-06-11 13:06:01 -04:00
Thomas Harte
271de23ee6 Ran on in and introduced a bunch more keys, hopefully to help to diagnose. 2016-06-11 12:26:19 -04:00
Thomas Harte
d7c1f5b18a Made an attempt at hooking up the '2' and '4' keys. A mostly unsuccessful attempt. 2 does nothing, 4 clears the screen. 2016-06-11 11:50:37 -04:00
Thomas Harte
7a241b5ef5 Added just enough hopefully to allow implementation of the keyboard-input VIA. 2016-06-11 11:34:39 -04:00
Thomas Harte
12d1cac751 Merge branch 'master' into Vic-20 2016-06-10 18:23:55 -04:00
Thomas Harte
805e2d15c6 Fixed timing when clock is divided. 2016-06-10 18:20:16 -04:00
Thomas Harte
1ed04fae1e Resolved 6560 addressing. 2016-06-10 18:12:21 -04:00
Thomas Harte
f3b1d7de82 ... and that's a flashing cursor. Keyboard input next! 2016-06-09 22:37:59 -04:00
Thomas Harte
30b7db3979 Attempted a square wave, made the Vic itself responsible for address manipulation re:the 6560. 2016-06-09 22:05:17 -04:00
Thomas Harte
e99055bedb Attempted switching back to a square wave for the composite video and otherwise implementing what's necessary to get to that flashing cursor — the 6560 returns its scan line and the timing bits of the 6522 are appearing. 2016-06-08 22:15:24 -04:00
Thomas Harte
581eace478 Increased logging slightly, ensured all of colour RAM can be read, slightly improved the 2600 pixel decoder. 2016-06-07 22:01:14 -04:00
Thomas Harte
26ab96868a Decided to turn the 6522 into a template, since it's a per-cycle thing with variable behaviour. Added appropriate memory map callouts to hit the two in the Vic. Though they don't yet do anything. 2016-06-07 19:15:18 -04:00
Thomas Harte
c7c55528e2 Realised that registers appear also to be readable. 2016-06-06 20:29:39 -04:00
Thomas Harte
64539a2b24 Advanced to having some characters displayed, even though they're obviously very much incorrect and the display is still rolling. 2016-06-06 07:35:35 -04:00
Thomas Harte
9e9e50edb1 Added guess on how colour memory and the 12-bit bus possibly works. 2016-06-05 16:28:06 -04:00
Thomas Harte
2ab21e7a3c Switched to a real (unexpanded) memory map, meaning that nonsense is no longer being supplied to the VIC. 2016-06-05 16:00:35 -04:00
Thomas Harte
9566c87532 Added enough to the machine that the 6560 can now produce output if it wishes. 2016-06-05 12:11:12 -04:00
Thomas Harte
b56482607e Added just enough that the 6502 should now be operating correctly. 2016-06-05 11:44:29 -04:00
Thomas Harte
0b221e773f Fixed ROM naming and sizes, ensured machines without sound outputs don't end up with an audio queue. 2016-06-05 11:20:05 -04:00
Thomas Harte
f922d38ed2 The Vic now captures the ROMs sent to it and has just enough infrastructure to get to a black screen. Progress! 2016-06-05 10:51:07 -04:00
Thomas Harte
12243c40ad Kicking the ball a little further down the road, ROMs and PRGs now reach the actual emulated machine. 2016-06-05 09:06:59 -04:00
Thomas Harte
b10a06e700 A CRT is still absent but this moves the ball back into the C++ side's court. 2016-06-04 22:00:50 -04:00
Thomas Harte
404873fe58 Started sketching out infrastructure for Vic-20 support. 2016-06-04 21:43:50 -04:00
Thomas Harte
604862b20b Fixed playfield/missile and playfield/ball collisions. 2016-06-02 22:36:52 -04:00
Thomas Harte
e3b95b8d2b Back to asynchronous updates and drawing, to try to improve guarantees on audio latency; experimenting with whether other parts of the approach are fundamentally flawed; added a broad-phase for scheduled updates on the 2600. 2016-06-02 21:22:55 -04:00
Thomas Harte
11073daee1 Issues appear to be around timing generally. Working on it. 2016-06-02 20:15:48 -04:00
Thomas Harte
7aac306a12 Quick fix to the polynomials. 2016-06-02 19:56:02 -04:00
Thomas Harte
253e5a4203 With no regard to performance whatsoever, endeavoured to bring sound to the 2600. It's very scratchy, so something is wrong. 2016-06-02 19:50:16 -04:00
Thomas Harte
1e0fcbbee8 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. 2016-06-01 19:53:16 -04:00
Thomas Harte
40c4544fb7 Got the basic sound pipeline pumping, just enough for static-level audio seemingly to work. Berzerk VE says "intruder alert, intruder alert", anyway. 2016-06-01 19:27:04 -04:00
Thomas Harte
8dc66167be Made an attempt to consolidate the Objective-C++ side of things based on the incoming CRTMachine::Machine. 2016-05-31 22:16:20 -04:00
Thomas Harte
5c4f35e13f 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. 2016-05-31 21:23:44 -04:00
Thomas Harte
3fc80ea01f Rethought, hopefully perfecting, sprite timing. 2016-05-30 19:56:36 -04:00
Thomas Harte
8b342f77a9 Made an attempt further to rationalise timing. 2016-05-27 21:51:27 -04:00
Thomas Harte
91d3453cc1 Switched to looking backwards rather than forwards. 2016-05-27 14:33:08 -04:00
Thomas Harte
106ddae907 Sprites are still a pixel off but better; made some attempt to move things outside of the loop. 2016-05-25 21:43:19 -04:00
Thomas Harte
40c2c0bd2d Minor simplifications and improvements. Still trying to figure out what's causing the non-linear edge addressing. 2016-05-25 21:12:25 -04:00
Thomas Harte
b01b474e36 I'm back to thinking that resets are deferred but pixel counts are live. 2016-05-25 07:32:25 -04:00
Thomas Harte
758806f924 Introduced a separate queue for pixels, which may or may not be correct. 2016-05-24 21:39:57 -04:00
Thomas Harte
0b081831a9 Set up a pipeline for all pixels that attempts to allow for appropriate delays. 2016-05-24 07:58:26 -04:00
Thomas Harte
5c1e594937 Realised there's a clocking delay on starting horizontal move. Which fixes Coke Zero. 2016-05-22 21:45:40 -04:00
Thomas Harte
c3e719c4ab Added missile-to-player offsetting. Completing the list of graphics-related TODOs. 2016-05-22 17:01:56 -04:00
Thomas Harte
4c6d4d899d Ensured that resetting the horizontal timer affects phase. 2016-05-22 16:29:53 -04:00
Thomas Harte
df93d7849d Re-enabled the ball. 2016-05-22 14:38:14 -04:00
Thomas Harte
0242924fb4 Various bits of caveman debugging appearing and disappearing, switched to latching ball behaviour. 2016-05-22 14:26:02 -04:00
Thomas Harte
5e220562e4 Actually, the four-clock delay, with palette taking effect immediately, appears to be correct. So back to the drawing board on that. 2016-05-21 21:44:54 -04:00
Thomas Harte
4eded9b9d0 Re-enabled collisions. 2016-05-21 13:05:36 -04:00
Thomas Harte
b1c84f5402 Counters run every scan line regardless of blank and sync. Also played further with timing. 2016-05-21 12:54:39 -04:00
Thomas Harte
470c90428a Switched to two-register implementation of VDELP, etc. 2016-05-21 10:26:27 -04:00
Thomas Harte
36d19cb6cf Made an attempt at properly pumping timers during hmove. 2016-05-21 10:18:15 -04:00
Thomas Harte
a952813036 Fixed missile sizes, played about with ball placement. 2016-05-19 18:30:17 -04:00
Thomas Harte
cf5b8ab92e This is now approximately back to where it was on Cosmic Ark. 2016-05-19 08:30:10 -04:00
Thomas Harte
40600b4bcb Made sprite placement consistent at least. Not necessarily yet correct. 2016-05-18 22:07:24 -04:00
Thomas Harte
e61392d3fb Fixed incorrect duplication. 2016-05-18 21:50:28 -04:00
Thomas Harte
8c7ce1ec3f Attempted to fix sprite sizing and, again, missile repetition. 2016-05-18 21:41:25 -04:00
Thomas Harte
d013d46337 Fixed object motion decoding and checking of the repeat mask for missile graphics. 2016-05-18 21:36:28 -04:00
Thomas Harte
83ed6a82cf Fixed: asserting vertical blank doesn't affect underlying timing. 2016-05-18 18:49:40 -04:00
Thomas Harte
877c55b5c5 Threw in missiles. To 'complete' graphics output. Or, rather, to move me on to debugging. 2016-05-18 07:54:44 -04:00
Thomas Harte
354143a78c Reintroduced an attempt to plot sprites. 2016-05-18 07:51:25 -04:00
Thomas Harte
0b99649b0f Had a first shot at triggering player and missile resets. 2016-05-18 07:31:05 -04:00
Thomas Harte
b8708b805c The vertical blank flag now works again. 2016-05-17 22:02:57 -04:00
Thomas Harte
a1e63e8320 Attempted to generalise on pixel counter storage, at least. Further adjusted background timing but I'm still not sure. 2016-05-17 21:41:32 -04:00
Thomas Harte
ad6f405483 Fixed: was off by one on pixels, allowing four extra pixel output cycles per line. 2016-05-17 19:02:32 -04:00
Thomas Harte
c96674b341 Made genuine first approximate attempt at hmove. 2016-05-17 18:35:40 -04:00
Thomas Harte
d170bb14e6 Extended scheduling plans, inserted initial events for hmove, albeit not yet implemented. 2016-05-17 18:21:49 -04:00
Thomas Harte
6a961c4d28 Added something of the ball counter, but without yet a working HMOVE it's prone to error. 2016-05-17 07:18:14 -04:00
Thomas Harte
7d3cf76576 Generalised slightly, to allow events to be queued up to eight cycles in advance; most importantly each event gets to pick its own delay. 2016-05-17 07:09:18 -04:00
Thomas Harte
3d003070b3 Made an attempt better to generalise the idea of things with 4 CLK delays. 2016-05-16 21:54:27 -04:00
Thomas Harte
4ad074fc78 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. 2016-05-16 19:55:56 -04:00
Thomas Harte
f19ed2e8f8 Started merely attempting to reintroduce the background layer. 2016-05-16 19:04:13 -04:00
Thomas Harte
9d92ad659f Established the basic timing loop, albeit without clocking delays yet. 2016-05-16 08:01:29 -04:00
Thomas Harte
cca53598d3 Made another run at 2600 colours. 2016-05-14 16:52:24 -04:00
Thomas Harte
8d52765f40 Realised why new shaders weren't taking. Very negligibly decreased Atari drawing cost. 2016-05-12 22:22:24 -04:00
Thomas Harte
6d65bc9b3a 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. 2016-05-11 22:11:01 -04:00
Thomas Harte
4b3c4082d2 These functions appear correctly to model the NTSC and PAL palettes; the CRT's attempt to switch function doesn't work properly yet though. 2016-05-11 21:07:18 -04:00
Thomas Harte
5a4262d74e Confirmed: it is inaccurate for a 6502 to self reset at power up. So that responsibility now rests in the machines. 2016-05-10 21:05:52 -04:00
Thomas Harte
1142c86811 Slightly simplified conditional. 2016-05-07 18:38:51 -04:00
Thomas Harte
bf9917707e Merge branch 'master' into Glitches 2016-05-05 08:31:40 -04:00
Thomas Harte
fea32869b0 Implemented what I now believe to be the real paging logic. 2016-05-05 08:28:06 -04:00
Thomas Harte
87df57195d Started on an attempt not to treat the various buffers as free to loop within, starting with the input texture. 2016-05-04 07:39:45 -04:00
Thomas Harte
3af97d4069 Eliminated redundant variable. 2016-04-26 19:57:05 -04:00
Thomas Harte
6c567d166a Fixed colour burst acceptance, switched to an integral single byte streaming of Atari colours. 2016-04-25 20:56:15 -04:00
Thomas Harte
9b64f64db7 Attempted to normalise some style decisions.` 2016-04-24 22:32:24 -04:00
Thomas Harte
7a8d100861 Found a new working formula for NTSC Atari 2600 colours. 2016-04-24 22:02:00 -04:00
Thomas Harte
d221c712b0 Ensured GL context is active when destructing CRTOpenGL. 2016-04-24 20:34:25 -04:00
Thomas Harte
db908a7547 Adjusted Atari to using its non-standard line lengths. 2016-04-24 19:23:30 -04:00
Thomas Harte
9260d97b03 Oh, of course, it's that the output vertex array doesn't get initialised unless there's an RGB shader program. Silly oversight. Fixed. And switched back to TV output for correct colours. 2016-04-24 17:56:36 -04:00
Thomas Harte
d0f9a6c2f5 Added a dump-the-input default RGB output shader. Which at least proves that the Atari 2600 is generally still working. 2016-04-24 17:35:25 -04:00
Thomas Harte
80a3169674 Started reviving the Atari 2600 emulation. Put new startup sequence into place. 2016-04-24 06:56:08 -04:00
Thomas Harte
ae2760e034 Colour phase is now updated and varies per line. 2016-04-21 21:07:29 -04:00
Thomas Harte
7aa87723a9 Added: key states are all cleared if the window loses focus. Which resolves sticky key issues. Allowing me just to use command+option+O for options and map both command and option as FUNC. 2016-04-19 21:29:10 -04:00
Thomas Harte
66f2c10c04 Resolved potential crash if tape requests are made without one inserted. Softened glFinish to glFlush, though I'm still not sure I should strictly need even that. 2016-04-19 21:00:48 -04:00
Thomas Harte
3d53f157de Output selection now takes effect. So I can stop accidentally committing changes back and forth. 2016-04-18 08:27:58 -04:00
Thomas Harte
94f148e212 Wired in options, at least getting as far as the Objective-C bridge. Then fast loading makes it to the emulated machine, display output type doesn't. 2016-04-18 08:21:00 -04:00
Thomas Harte
499f7ace07 Re-enabled working video output for the Electron for the day and consolidated the rough metric I'm using to pick a number of taps for the audio filter. 2016-04-17 20:43:20 -04:00
Thomas Harte
6ff9ffba6c Switching temporarily to an attempt to draw input runs as if RGB: shader compiles, fixed a race condition on out-of-bounds accesses for the source buffer. 2016-04-17 15:51:28 -04:00
Thomas Harte
104f44f27f Attempted to improve deinterlacing, gave the CRT full control over blend mode, switched back to 2000000Mhz audio. 2016-04-14 22:20:47 -04:00
Thomas Harte
6a17c2992d Introduced a compile-time configurable audio divider, set it arbitrarily to '8' for now. Discovered why my graphics aren't centred and added a TODO. 2016-04-13 22:31:59 -04:00
Thomas Harte
026ce0255f Source runs are now captured, and that buffer appropriately reset. 2016-04-13 22:20:13 -04:00
Thomas Harte
2ea02ed127 A source array buffer is also now created, mapped, unmapped, etc. 2016-04-13 22:14:18 -04:00
Thomas Harte
955e185790 Minor simplification. 2016-04-13 19:19:04 -04:00
Thomas Harte
4d889d9c7f Made an attempt slightly to simplify the fragment processor, at both ends. 2016-04-12 22:35:11 -04:00
Thomas Harte
2cc72169ff Ensured machines can nominate their own aspect ratio windows. Switched to 11/10 for the Electron. 2016-04-11 23:12:56 -04:00
Thomas Harte
7276a06cc0 Added a helper to calculate a visible rect based on output timings, used it to scale the Electron output up to the full window size. 2016-04-11 21:47:23 -04:00
Thomas Harte
a3c2cd880e I discovered a further post on this on the STH forums; apparently the Electron simply asserts sync continuously. No breaks. 2016-04-11 21:01:09 -04:00
Thomas Harte
bdb99ba92f Corrections back towards composite output: fixed misnamed constant, ensured the CRT doesn't write nonsense to the output buffer, ensured it grows three vertices at a time rather than six when desired. Net effect should be that the output stage is working again, with the input processing remaining to fill in. 2016-04-10 22:56:52 -04:00
Thomas Harte
8701366277 Switched horizontal sync detection back to differential, switched the Electron to an XOR-style sync output (believed to be accurate, but I need to check), fixed some latent issues around vertical sync detection. 2016-04-10 21:34:40 -04:00
Thomas Harte
e617bd2bb3 Turned audio quality up to the maximum, at least for now. 2016-04-06 21:12:22 -04:00
Thomas Harte
5aa6da221f Shifted responsibility for byte shifts, probably to a more logical place. 2016-04-05 22:19:14 -04:00
Thomas Harte
2248769df9 Pulled a bunch of selection parts outside of the loops. Probably exhausting this angle of attack. 2016-04-05 22:17:44 -04:00
Thomas Harte
8f87973a96 Switched to table-based byte to output conversion. 2016-04-05 22:07:10 -04:00
Thomas Harte
e35456612a Simplified 40-column to pixel conversion. 2016-04-05 20:44:05 -04:00
Thomas Harte
6dbd20ffde Expanded interface to rgb_sample to eliminate its need to make assumptions about globals, used expanded interface to compact Electron data to two pixels per byte. 2016-04-05 20:32:55 -04:00
Thomas Harte
7838507a7a Simplified sound generation. 2016-04-04 22:22:19 -04:00
Thomas Harte
729fddea1c Switched to integer textures, likely to simplify for most use cases. 2016-04-04 19:39:01 -04:00
Thomas Harte
3ca58b2a57 Attemted further to diminish jumpiness. 2016-03-22 22:07:30 -04:00
Thomas Harte
8cd5d40e00 Made an attempt to reduce the amount of data heading to the GPU. 2016-03-22 21:16:32 -04:00
Thomas Harte
902017a962 Fixes: drop any processing backlog, try not to allow an Electron document to close mid-draw, perform a frame grab even if the emulated machine is over-processing, really really don't create a CRT until it's safe. 2016-03-20 18:42:37 -04:00
Thomas Harte
fb6fb5d948 Switched to two-phase setup to deal with OpenGL scheduling. 2016-03-20 13:50:13 -04:00
Thomas Harte
aa8a192c7e Simplified API down to their being a single texture with a specified depth. 2016-03-19 17:37:55 -04:00
Thomas Harte
b074860031 Updated to latest information on interrupt timing. 2016-03-18 21:11:25 -04:00
Thomas Harte
4cd0aa3416 Completed FIR filter based audio output. 2016-03-15 23:37:35 -04:00
Thomas Harte
0edf165401 Fixed sound pitch, though I'm not yet exactly sure why. 2016-03-14 22:52:16 -04:00
Thomas Harte
9a492ac15f Made a further guess at the state interrupts would probably be left; slightly simplified interface. 2016-03-14 22:42:52 -04:00
Thomas Harte
15120d8fb6 Switched to probably more accurate contended memory, resolved issue of not leaving the tape data received interrupt set when returning a byte from the fast tape, fixing Joe Blade, and tested slightly further to determine that interrupts probably signal upon entry into horizontal sync. 2016-03-14 19:29:28 -04:00
Thomas Harte
fb26b38ff9 This is as simplified as things seem to be able to get without breaking at least Northern Star. Joe Blade et al remain stubbornly broken but I'm not immediately able to determine why. 2016-03-13 19:55:20 -04:00
Thomas Harte
f797e6b5b6 Started taking baby steps towards a genuine unification of the tape interrupt generating code. 2016-03-13 19:45:50 -04:00
Thomas Harte
bc554dedf7 Fixed: attempting to read the screen start address no longer alters it. 2016-03-13 18:50:23 -04:00
Thomas Harte
1c4acfb599 I think this is a prima facie acceptable implementation of the fast tape hack. 2016-03-13 17:39:53 -04:00
Thomas Harte
4462bb92f8 Moved interrupt back down to where it's probably meant to be. 2016-03-12 23:18:46 -05:00
Thomas Harte
cdff90f20d Fixed: setting an interrupt control value with the lowest bit set could result in interrupts that can't be disabled. 2016-03-12 22:55:33 -05:00
Thomas Harte
6327311130 Made an attempt to separate and clarify on tape interrupts. 2016-03-12 20:32:26 -05:00
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