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805 Commits

Author SHA1 Message Date
Thomas Harte
0c9be2b09e 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. 2017-02-12 18:16:50 -05:00
Thomas Harte
df8a5cbe6d Made attempts (i) to respect the delay flag; and (ii) to account for border-region sprite clocking. 2017-02-12 17:35:09 -05:00
Thomas Harte
9ce68c38ae Made an effort to implement proper pixel output for sprites. 2017-02-12 14:01:50 -05:00
Thomas Harte
40954d6a2a Attempted to factor out parts I expect to reuse for missiles and the ball. 2017-02-12 11:31:17 -05:00
Thomas Harte
ac444a3f34 Corrected both position increments and target time calculation. 2017-02-11 21:24:14 -05:00
Thomas Harte
b8abeced6d Made an attempt to introduce the proper eventful loop for player output. With debugging yet to occur. 2017-02-11 21:01:58 -05:00
Thomas Harte
aeff59addc Implemented motion 'correctly', for programs written to do all work outside of the pixel area. 2017-02-11 20:25:49 -05:00
Thomas Harte
aff69dbc34 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. 2017-02-11 13:35:22 -05:00
Thomas Harte
6381e4e1b0 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. 2017-02-11 13:34:36 -05:00
Thomas Harte
905ed1f87b Switched to the more natural type, which is also signed, making my logic less prone to error. 2017-02-11 13:16:53 -05:00
Thomas Harte
8de6caf6ff Started trying to get into a proper structure here. Chickened out. 2017-02-11 12:59:13 -05:00
Thomas Harte
40d3f5f7f6 Attempted properly to respect start. 2017-02-11 08:26:09 -05:00
Thomas Harte
64d5712d1d Added an incorrectly-coded version of horizontal move, at least so that I can verify that information is going into the correct slots. 2017-02-10 07:23:43 -05:00
Thomas Harte
3b20d862f0 Made an initial attempt to mark sprite positions. But without hmove implemented, they're all over the place. 2017-02-09 20:53:42 -05:00
Thomas Harte
2e9ef2b0ef Took a shot at reinstating the horizontal blank extend flag. 2017-02-09 18:37:19 -05:00
Thomas Harte
70745286a5 Ensured this array is properly aligned for the uin32_t accesses I intend to make for background drawing. 2017-02-08 20:25:23 -05:00
Thomas Harte
dcb7584060 Added the four-cycle playfield output latency and ensured you can't get smaller-than-usual pixels by rapid register value changing. 2017-02-08 07:30:32 -05:00
Thomas Harte
a477499724 Got a bit more explicit with range returned by get_cycles_until_horizontal_blank and hence attempted a more thorough (/correct) version of WSYNC. 2017-02-07 22:14:45 -05:00
Thomas Harte
944d835eea Switched explicitly to an accumulation model for filling the collision buffer. 2017-02-06 21:59:28 -05:00
Thomas Harte
8f5039130c Changed index naming order to ensure no out-of-bounds accesses. 2017-02-06 21:48:41 -05:00
Thomas Harte
ba165bb70a Made an attempt properly to populate collision registers from the collision buffer. 2017-02-06 21:15:55 -05:00
Thomas Harte
474e2e8d2c Fixed once again to respect mid-line palette changes. 2017-02-06 20:09:12 -05:00
Thomas Harte
8b8eb787df Fixed complete invisibility. 2017-02-06 18:42:58 -05:00
Thomas Harte
66bcdd36f3 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! 2017-02-06 18:29:00 -05:00
Thomas Harte
6bcf95042c Started trying to be a bit more explicit about usage, and to divide up drawing responsibility. 2017-02-05 17:51:56 -05:00
Thomas Harte
f2437cb257 Added some additional documentation, started making steps towards returning sprites, fixed a counter bug that would exhibit as incorrect sync. 2017-01-31 20:30:32 -05:00
Thomas Harte
abe04334c2 Attempted to retain more player information, and removed the output cursor from class storage as I think it's acceptable as a temporary. 2017-01-30 22:42:27 -05:00
Thomas Harte
8545707b54 Reinstituted the playfield. Probably needs more buffering though. Time to look into delays. 2017-01-30 21:38:58 -05:00
Thomas Harte
2b08758b2b Started capturing playfield/ball and background colours. 2017-01-30 08:08:03 -05:00
Thomas Harte
764b528891 Made a first attempt at switching to a model that respects blank and sync. 2017-01-30 07:19:19 -05:00
Thomas Harte
92754ace7a Some mild fixes get me up to having a rolling screen of vertical lines. Which is what I was hoping for right now! 2017-01-29 22:16:23 -05:00
Thomas Harte
d51f185dc7 Made an attempt to reintroduce the basic horizontal loop. 2017-01-29 15:43:57 -05:00
Thomas Harte
2390358c24 Prevented unbounded CPU usage, albeit without yet deciding who has authority for the clock rate. 2017-01-29 14:19:26 -05:00
Thomas Harte
2432a3b4d7 Fixed condition — >= is smarter. 2017-01-29 14:00:01 -05:00
Thomas Harte
9c3597c7e3 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. 2017-01-29 13:47:36 -05:00
Thomas Harte
fba6baaa9c Stubbed and disabled to get back to building. 2017-01-28 21:56:01 -05:00
Thomas Harte
a246530953 Supposing the TIA were implemented, this is (more or less) what the Atari 2600 would now look like. 2017-01-28 21:46:40 -05:00
Thomas Harte
0ffded72a6 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. 2017-01-28 16:19:08 -05:00
Thomas Harte
6d087ca054 Restored 2600 audio. 2017-01-25 21:29:19 -05:00
Thomas Harte
be1cb2a551 Fixed NTSC phase. 2017-01-11 21:31:24 -05:00
Thomas Harte
6153ada33b Fixed Electron's support for automatically booting floppy disks. 2017-01-08 14:46:19 -05:00
Thomas Harte
8cd1575891 Similar fix to that over in Oric land: ensure a known, effective initial value for the Plus 3's control register. 2016-12-28 18:52:36 -05:00
Thomas Harte
90151e2094 Fixed to ensure a known initial control register value, which has taken effect. 2016-12-28 18:49:32 -05:00
Thomas Harte
a568172758 Made steps towards proper CRC generation. Am currently comparing against Oric disk images, as — amongst other things — they include precomputed CRCs. 2016-12-28 18:29:37 -05:00
Thomas Harte
4fca30b81f Made the Plus 3 less chatty, documented invalidate_track. 2016-12-25 21:06:58 -05:00
Thomas Harte
3805e3d17d Ensured base address is set properly at construction. 2016-12-22 22:46:02 -05:00
Thomas Harte
63107cd492 Tidied, very slightly. 2016-12-15 19:49:25 -05:00
Thomas Harte
a555c5762a Rearranged code, hopefully into a more logical grouping. 2016-12-15 19:47:04 -05:00
Thomas Harte
4a7ddaf2e9 Added documentation and a quick note to self. 2016-12-15 19:43:04 -05:00
Thomas Harte
f61176cd7d Reinstituted something of the don't-do-pixel-work-until-an-affecting-write-occurs optimisation. 2016-12-15 19:20:14 -05:00
Thomas Harte
c1c70a767a Attempted fully to reinstate proper timing. 2016-12-15 18:52:16 -05:00
Thomas Harte
0326316bb8 Reinstated whole-frame counting. Thereby to reinstate proper interrupts. 2016-12-15 18:09:49 -05:00
Thomas Harte
b58b11fc93 Switched to a table-based dispatch of line-by-line actions, primarily to simplify. 2016-12-15 18:07:46 -05:00
Thomas Harte
fd541e1142 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. 2016-12-12 08:01:10 -05:00
Thomas Harte
be7e05e109 Started attempting to move total responsibility for display-related interrupts and RAM timing into the video. 2016-12-11 18:34:49 -05:00
Thomas Harte
c5cf8d9531 Ensured the video subsystem correctly handles requests to run over a frame boundary. 2016-12-11 16:17:51 -05:00
Thomas Harte
52028432e1 Restored some semblance of output. 2016-12-10 22:19:10 -05:00
Thomas Harte
0aae1bd1ef Fixed calculation of termination cycle. 2016-12-10 21:35:41 -05:00
Thomas Harte
c43e481a33 Started factoring video out of the Electron. 2016-12-10 21:07:52 -05:00
Thomas Harte
e62be03673 Removed endianness assumption. 2016-12-10 19:10:33 -05:00
Thomas Harte
a5683dfb21 Removed now untrue comment. 2016-12-10 15:19:48 -05:00
Thomas Harte
0e71802b92 Reduced Oric video to single nibble constants. Removed attempt at asynchronous flush as no longer required. 2016-12-10 14:17:46 -05:00
Thomas Harte
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
Thomas Harte
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. 2016-12-10 13:42:34 -05:00
Thomas Harte
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
Thomas Harte
3b5962b171 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
Thomas Harte
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
Thomas Harte
ebb62a2d78 Switched the 2600 to postfix and non-camel-case instance variable names. 2016-12-03 14:07:38 -05:00
Thomas Harte
b81c058c0a Factored out the Atari 2600's 6532 connection, as a low-hanging fruit. 2016-12-03 13:41:55 -05:00
Thomas Harte
3361d6b93a Factored out the Atari 2600 speaker and adjusted it to postfix underscores. 2016-12-03 13:39:46 -05:00
Thomas Harte
1b1a8d3e52 Brought the Vic-20 into suffix naming. 2016-12-03 13:30:27 -05:00
Thomas Harte
063a62372f The Commodore serial bus and C1540 are now postfix underscorers. 2016-12-03 13:14:03 -05:00
Thomas Harte
eb3a1fbfb7 Commuted remaining Electron underscores. It would be nice also to factor out the video, but the time hasn't come yet. 2016-12-03 13:01:01 -05:00
Thomas Harte
4fac538a57 Factored out the Electron's speaker and adjusted instance variable naming. 2016-12-03 12:41:02 -05:00
Thomas Harte
d1d93829cf Factored out the Tape and switched it to postfix underscores. 2016-12-03 12:18:08 -05:00
Thomas Harte
2003b514aa Switched the typer to postfix underscores. 2016-12-03 10:55:50 -05:00
Thomas Harte
81ee834530 As well as a bunch of logging, reinstated rotation position preservation across tracks. 2016-12-02 18:36:47 -05:00
Thomas Harte
93c573bfa9 Implemented missing status bits (other than the index hole), and a head loading delay for the Microdisc. 2016-12-01 21:13:16 -05:00
Thomas Harte
442986ee2c Introduced a head loading path for 1793 machines. 2016-12-01 20:12:22 -05:00
Thomas Harte
82899f2f47 Ensured flag setting is atomic, removed duplication of interrupt request versus busy, found better names for the personality testers, unified delegate protocol. 2016-12-01 07:41:52 -05:00
Thomas Harte
9b6c5e814a Now that it can be more explicit, this should admit that it's '93-based, not '73. 2016-11-28 16:22:35 -05:00
Thomas Harte
2f459690d4 It would appear the 1770 and 1773 actually differ in relation to the (non-sensical) ability not to spin-up for a Type 2, and whether a side compare can occur. So the WD1770 class now requires a personality to be specified. Which it singly fails to honour. 2016-11-26 23:29:30 +08:00
Thomas Harte
e9d6566e9c Of course, changing the IRQ enable may immediately change the IRQ line. Signal if so. 2016-11-26 09:35:44 +08:00
Thomas Harte
73d30b9c00 Corrected typo. 2016-11-25 21:30:45 +08:00
Thomas Harte
12956901d6 Filled in some register mirrors. 2016-11-25 21:28:11 +08:00
Thomas Harte
54246c8f1a Interrupt enabling works the other way around I think, and both registers with only one bit defined should probably return '1' in all other places? 2016-11-25 21:24:59 +08:00
Thomas Harte
8be81f6ebd Supplied disks are given to the Microdisc. 2016-11-25 20:53:38 +08:00
Thomas Harte
4af678d2ed Gave the Microdisc a clock signal, added just enough of force interrupt to avoid a spurious belief that a type 3 command has started. 2016-11-25 20:51:39 +08:00
Thomas Harte
5c019ad1c0 Okay, so it looks like both ROM paging flags are the opposite of what I previously had. 2016-11-25 20:42:40 +08:00
Thomas Harte
5be45c6c50 Ensured proper default behaviour. 2016-11-25 20:30:27 +08:00
Thomas Harte
d33f3b9224 This is the broad strokes effort at enabling Microdisc emulation. 2016-11-25 20:15:48 +08:00
Thomas Harte
7c2d9f3752 This seems to be right, per http://wiki.defence-force.org/doku.php?id=oric:hardware:floppy_disk_controller_wd1793 2016-11-22 22:35:43 +08:00
Thomas Harte
5ebc1c63ff Switched video to postfix underscores, for consistency. 2016-11-22 22:28:45 +08:00
Thomas Harte
707763f80b Added Microdisc storage to the Oric class, switching all instance storage to postfix underscore while I'm here. 2016-11-22 22:22:00 +08:00
Thomas Harte
0c3644f350 Made a second parse at logic. We'll see. 2016-11-22 22:12:32 +08:00
Thomas Harte
03843bf934 Unified delegates. Let's keep it easy for the caller. 2016-11-22 22:11:11 +08:00
Thomas Harte
13a608a8c2 Added what may be correct paging logic. 2016-11-22 22:09:52 +08:00
Thomas Harte
363db695e8 Started implementation of the Microdisc selection logic. 2016-11-22 08:12:53 +08:00
Thomas Harte
09f965e6a9 Fixed potential bug whereby inserting a disk into a drive that hadn't been lazily allocated yet but had already been selected wouldn't take effect. 2016-11-22 08:11:57 +08:00
Thomas Harte
ea33a28695 Any Oric-format disks that are inserted now make it all the way to the Oric, along with a request to emulate the Microdisc. It has received a copy of the ROM. The ball is entirely in its court now. 2016-11-21 20:59:25 +08:00
Thomas Harte
311f8c0b47 Restored audio. 2016-11-16 11:10:07 +08:00
Thomas Harte
8b40ae03ca Extended analysis to spot IRQ and NMI vector changes, for titles that simply adjust those then exit. Ensured Oric emulator can type and load quickly on an Oric 1 just as well as on an Atmos. 2016-11-15 11:05:53 +08:00
Thomas Harte
e2cdfae8a7 The emulated Oric now has access to both versions of the BASIC ROM and picks between them based on the static analyser's recommendation. 2016-11-15 10:39:16 +08:00
Thomas Harte
9c550c594a Moved audio work back into its own thread, but this time it queues up an all happens only upon a flush. Hopefully to resolve synchronisation cost concerns. 2016-11-09 21:17:50 -05:00
Thomas Harte
64827931bf Switched the Oric implementation simply to rely upon the Storage-level tape parser. So now there's only one, authoritative one of those. 2016-11-07 21:57:58 -05:00
Thomas Harte
45b169f341 Made a few mapping fixes, clarified where the default reset code lives, ensured the Oric and Vic clear their keys when the typer ends. 2016-11-05 15:28:03 -04:00
Thomas Harte
338904fffe Made similar cleanings of the Electron and Vic. 2016-11-05 15:07:57 -04:00
Thomas Harte
9fb9d92437 Made the typer much more able to help out, and thereby tidied and separated the Oric's typer. 2016-11-05 14:47:09 -04:00
Thomas Harte
626e719fab Added sanity checks on loading quickly. 2016-11-03 22:50:49 -04:00
Thomas Harte
a7e4c0c3b5 Switched to a ROM trap for typing. 2016-11-03 22:21:05 -04:00
Thomas Harte
8c70dc5891 Implemented typer for the Oric, and I'm starting to think the code is a bit too repetitious. Refactoring will be forthcoming. Added CLOAD"" as the loading command for all Oric software. 2016-11-03 22:14:40 -04:00
Thomas Harte
9c2df231ce Made fast loading optional. 2016-11-03 07:59:30 -04:00
Thomas Harte
e9f1a6a79d This appears to be it. The secret? Don't worry about the stop bits. They're just processing time. Latch onto the next start. 2016-11-03 07:34:48 -04:00
Thomas Harte
827a919368 This is an initial attempt at reading actual tape data. It loses sync though. 2016-11-02 22:30:53 -04:00
Thomas Harte
419629ee6e Completed proof of theory for fast loading. It's just an around-the-back direct-to-file hack for now though. 2016-11-02 21:09:49 -04:00
Thomas Harte
bb58caff52 Merge branch 'master' into FastOricTape 2016-10-31 22:11:03 -04:00
Thomas Harte
21604376e6 Reintroduced clocking of the AY and boxed in the range of the master divider a little further. 2016-10-30 22:51:08 -04:00
Thomas Harte
33512988fb Added a basic cycle skipper plus some notes. 2016-10-30 22:39:47 -04:00
Thomas Harte
b04ba41951 Moved code out of header. 2016-10-30 20:16:58 -04:00
Thomas Harte
3b52ab0d37 Cut some dead state. 2016-10-30 20:16:52 -04:00
Thomas Harte
58f888c6ad Limited CRT calls. 2016-10-30 16:21:20 -04:00
Thomas Harte
1ff9b474bf Made an attempt to make execution flow through this loop more straightforward for a branch predictor. 2016-10-30 15:30:39 -04:00
Thomas Harte
7843a244b0 Ensured emulation doesn't enter an infinite loop if the user attempts to read beyond the end of a tape. 2016-10-28 22:23:25 -04:00
Thomas Harte
4fab794747 Added a direct-to-two-cycles emulation path for 6522 owners. 2016-10-27 21:13:25 -04:00
Thomas Harte
2eda0b3c86 Attempted to simplify the logic behind the most common 6522 usage. 2016-10-27 21:06:31 -04:00
Thomas Harte
30d4a7c662 Fixed: blinking means ink vanishing and appearing. Nothing else. 2016-10-24 21:58:15 -04:00
Thomas Harte
09687a2e2f Removed errant newline. 2016-10-20 21:30:12 -04:00
Thomas Harte
44910d90ba Adjusted aberrations in semicolons. 2016-10-20 21:20:13 -04:00
Thomas Harte
6292ac5b26 Yet more .hpp clean(s)ing. 2016-10-20 21:15:21 -04:00
Thomas Harte
c5948ef177 Evicted more header-resident code. 2016-10-20 21:05:32 -04:00
Thomas Harte
d335991e60 Shifted code out of the header. 2016-10-20 20:53:17 -04:00
Thomas Harte
9c956f83b8 Made it slightly more clear that the correct test is conformed to. 2016-10-20 19:23:36 -04:00
Thomas Harte
21cfb39ed9 Added 60Hz output support. 2016-10-20 07:34:23 -04:00
Thomas Harte
5c69728625 Introduced a memory fuzzer, and ensured the Oric uses it. 2016-10-19 21:31:50 -04:00
Thomas Harte
734b575d30 Ensured no attempt to write to pixel storage if none was available. 2016-10-19 21:17:27 -04:00
Thomas Harte
ca28e3c64e Ensured the AY is pumped linearly, not exponentially. 2016-10-18 22:21:06 -04:00
Thomas Harte
9669a5ec9b Switched to a more authentic interfacing to the AY. 2016-10-18 19:32:15 -04:00
Thomas Harte
988bbb5ab1 Ensured AY registers aren't rewritten just because of a synchronise event. A stall prior to figuring out proper bus logic, clearly. 2016-10-17 08:05:57 -04:00
Thomas Harte
1a57e89ff0 Altered phase so that it now merely accounts for accumulated error across a frame. Can probably do better. 2016-10-17 08:04:15 -04:00
Thomas Harte
61ad0f8bdc Fixed inverse characters, added an extra per-frame phase change, based on empirical observation, ensured header guard won't become ambiguous. 2016-10-16 22:14:01 -04:00
Thomas Harte
a67afb7efa Switched to a tight crop on the pixel part of the display. 2016-10-15 21:43:46 -04:00
Thomas Harte
a608bbebfb Performed enough wiring to put the onus back onto OricTAP to do appropriate things. 2016-10-15 21:32:59 -04:00
Thomas Harte
6d7c3f6ac2 Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric. 2016-10-15 21:21:18 -04:00
Thomas Harte
9730e8247f Ensured propagation of synchronise messages, added enough to do plain tone. Probably. So: noise and envelopes missing. And it's all far too quiet. 2016-10-15 21:04:21 -04:00
Thomas Harte
51bdac27ae Made some AY advances; it's now being polled for samples and collecting more information on what it needs to output. 2016-10-15 17:45:39 -04:00
Thomas Harte
da9c9ad51a Added in the missing keys; added variable phase to the video. 2016-10-14 22:39:27 -04:00
Thomas Harte
288d10c253 Got some keyboard reaction. 2016-10-14 21:44:15 -04:00
Thomas Harte
3dbb602419 This seems to be a bit more likely. 2016-10-14 21:36:59 -04:00
Thomas Harte
138eabcff4 Continued in my effort to wire up a keyboard. Will need further to continue. 2016-10-14 21:35:15 -04:00
Thomas Harte
d8e4c488c2 Started iterating towards having an AY and a fully-working keyboard. 2016-10-14 21:18:03 -04:00
Thomas Harte
8867ad647c Made an attempt at implementing the loopbacks necessary for diagnostics. 2016-10-13 21:47:12 -04:00
Thomas Harte
41e7eff6c8 Added a VIA. Now it's time to find out how poor my 6522 emulation is. 2016-10-13 20:50:55 -04:00
Thomas Harte
c9962f6502 Made an almost complete implementation of video. Just one row of the diagnostics cartridge seems to be off, showing thw wrong character set. 2016-10-13 19:34:29 -04:00
Thomas Harte
69920a4979 Made some basic first attempt at parsing video attributes; ensured lowest byte of ROM is readable. 2016-10-13 07:59:11 -04:00
Thomas Harte
ae48ad1bb4 Meaningful text! Albeit with the initial 'O' of 'Oric' missing. I guess control codes and NMIs next? 2016-10-12 22:03:54 -04:00
Thomas Harte
120b2d9e33 Switched to using a diagnostic ROM for now, as it'll definitely boot without initially requiring either a 6522 or AY. Have some forms appearing which imply I'm not doing badly, at least up to not knowing where I'm supposed to get character pixels from. 2016-10-12 21:52:47 -04:00
Thomas Harte
1f857c619b Fixed timing issues. Static box of frame achieved! 2016-10-12 21:42:36 -04:00
Thomas Harte
304f0999cd Made a faulty but hopefully creditable attempt to demarcate an Oric frame. 2016-10-12 21:29:21 -04:00
Thomas Harte
8c8a71107e Added just enough wiring to add something that will generate the video, one day. 2016-10-12 19:20:23 -04:00
Thomas Harte
e6937d8003 Ensured that the ROM gets installed. So next for some video action? 2016-10-12 18:51:02 -04:00
Thomas Harte
4a062c616f Added enough wiring to get Oric TAPs through to a completely unimplemented Oric emulation. 2016-10-11 22:20:13 -04:00
Thomas Harte
922dd6a586 Hit up the other two kinds of audio generator. 2016-10-07 17:10:00 -04:00
Thomas Harte
de658b70d7 That's thread safety, subject to the async task queue being made to work... 2016-10-07 17:02:36 -04:00
Thomas Harte
2d26feb073 Added mappings for the previously-missing characters @, [ and ]. 2016-10-04 22:03:53 -04:00
Thomas Harte
f9ee6803df It's likely this should be set at startup too, based on latest info. 2016-10-03 22:16:10 -04:00
Thomas Harte
97304e22f0 Adjusted per tests on StarDot; it appears the tape interrupts may fire during audio output, as if in tape output mode. 2016-10-03 20:03:14 -04:00
Thomas Harte
dae6b45464 Ensured the always-on bit of the interrupt status register is indeed on. 2016-10-03 19:15:31 -04:00
Thomas Harte
cd1ab09701 The Vic-20 now inserts ROMs again. 2016-09-29 20:15:25 -04:00
Thomas Harte
79412dc84d Upped MFM clock cycles, switched back to using the typer for the ADFS and adjusted ADFS ROM slots. 2016-09-28 21:28:34 -04:00
Thomas Harte
4db086949a Made an attempt to add MFM decoding to the 1770; ensured something is returned when reading the Plus 3 status register again. 2016-09-25 21:38:52 -04:00
Thomas Harte
572d5587d9 Made a first stab at enabling multi-disk machines and thereby obeying (some of) the Plus 3's status register. 2016-09-25 21:24:16 -04:00
Thomas Harte
9bbcbd1001 Renamed class, intending to turn a Disk::Drive into literally just that, and have a thing with a PLL that consumes events be a Controller. 2016-09-25 20:05:56 -04:00
Thomas Harte
7f4c78139c Attempted to ensure that ADFS disks get to an appropriately-configured Electron. Not immediately sure why the shift press isn't working; doesn't need to be dealt with immediately. 2016-09-25 19:59:46 -04:00
Thomas Harte
6084020ab3 Added shift-break as a better way to boot suitable disks. Continued attempting to clean the 1770. 2016-09-25 14:11:22 -04:00
Thomas Harte
ce4100e5b9 Fixed slots for DFS and ADFS to sideways RAM; continued working on the 1770 to get as far as trying to get the body of a sector. 2016-09-24 22:04:54 -04:00
Thomas Harte
8db0030068 Fixed ROM loading by the Electron, turned the WD1770 into a 'disk drive' (it'll do for now), persuaded it to get all the way through a very specifically convenient type 1 command. 2016-09-20 22:14:33 -04:00
Thomas Harte
3b97b038b9 Corrected and sketched out state machine far enough to get to a complaint about unhandled work. 2016-09-20 15:56:31 -04:00
Thomas Harte
e358057440 Added a WD1770 run_for_cycles call. So I really can now move that as far as reporting that it has no disk? 2016-09-20 07:42:17 -04:00
Thomas Harte
cd5939501f Treading water some more, ensured the DFS and ADFS ROMs get to the Electron. It now even inserts the DFS ROM if it has a DFS disk image. Might need to make it a sideways RAM though? Regardless, the next job surely — surely! — has to be to stop avoiding the 1770? 2016-09-20 07:36:57 -04:00
Thomas Harte
a9e65e9b7a Tweaked disk side density, added call-outs to a WD1770 if the Electron had one (albeit without run_for_cycles yet as I need to figure out the clock rate), added a shell of the basic functions of the WD1770. No implementation yet. 2016-09-19 22:06:56 -04:00
Thomas Harte
64f2538b1f Added CRC checking to DFS comprehension; fixed a bunch of places where I'd used Objective-C's #import rather than #include. 2016-09-19 08:16:06 -04:00
Thomas Harte
142254a478 Resolved failure to open disks that arrive through analysis. 2016-09-17 18:11:58 -04:00
Thomas Harte
ee8510984f Added just enough wiring to restore the 2600 to functionality. 2016-09-15 19:34:45 -04:00
Thomas Harte
e3571e8b9e Added insurance against an infinite loop should the tape be exhausted. 2016-09-12 22:22:23 -04:00
Thomas Harte
40660fe680 Made yet another guess at Commodore analysis. Elevated fast tape-related unnatural speed up to the OS-side mechanisms. 2016-09-12 22:06:03 -04:00
Thomas Harte
e54a2326a3 Made attempt to run at zero cost while processing tape input. 2016-09-11 17:34:02 -04:00
Thomas Harte
eeec516fa6 Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator. 2016-09-11 17:09:00 -04:00
Thomas Harte
8c84f3581a Attempted to bring some uniformity in application of configurations. 2016-09-08 05:32:17 -04:00
Thomas Harte
50175a9aed Added logic to try to spot when the first program is BASIC and, if so, what the correct memory model is, then to get that information to the Vic. Though it currently then gets overwritten by the view controller. Grrrr. 2016-09-07 22:17:19 -04:00
Thomas Harte
21e5f407d8 I need to get a bit more definitive on naming but this gets all the way to setting a configuration upon an Electron. 2016-08-31 22:03:42 -04:00
Thomas Harte
56c0d70c1f Gave disks their own namespace. 2016-08-27 17:15:09 -04:00
Thomas Harte
c0402d0c2b Gave tapes their own namespace. 2016-08-27 17:09:45 -04:00
Thomas Harte
55ada536ac Added a test call, further mutated result structure. 2016-08-27 14:25:16 -04:00
Thomas Harte
dab3580111 Experimental: can I afford a lower sampling rate if there's a low-pass filter in effect? 2016-08-22 22:18:05 -04:00
Thomas Harte
1541273785 Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately. 2016-08-21 18:13:31 -04:00
Thomas Harte
99157ad6b2 Ensured the 6560 knows its real audio clock on a PAL machine; removed some stray semicolons. 2016-08-19 13:35:34 -04:00
Thomas Harte
e985c72ce8 Removed a dead special case. 2016-08-19 12:23:06 -04:00
Thomas Harte
4edd1214f1 This has now successfully loaded its first PRG-as-a-tape. 2016-08-19 10:58:42 -04:00
Thomas Harte
2935848f35 Adopted header/header/data/data pattern. But still not complete joy. 2016-08-17 08:03:34 -04:00
Thomas Harte
dfe9fb83ef This proves that bytes are being deposited properly. For the first 36 anyway, and with no announcement. 2016-08-16 21:09:50 -04:00
Thomas Harte
12f8aff65b Lengths I'd taken seem to have been for dipoles, not single poles. So I just doubled the clock rate. Also I was producing each dipole as high then low, when they should probably be low then high. The Vic now at least recognises that something is happening on the tape. 2016-08-16 19:46:53 -04:00
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