Thomas Harte
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94db45456e
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Started sketching out the basic form here, albeit that it doesn't yet do _the only thing it advertises itself as useful for_.
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2016-07-12 20:23:56 -04:00 |
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Thomas Harte
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75d95c0bc0
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Sketched out an interface for a digial PLL. Not persuaded yet. Baby steps.
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2016-07-11 22:12:58 -04:00 |
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Thomas Harte
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d0200b6fd9
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Merge pull request #40 from TomHarte/DiskFileFormats
Establishes the form of a modelled floppy disk plus parts of the most-likely implementation; implemented support for G64 as the first input format
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2016-07-10 18:37:44 -04:00 |
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Thomas Harte
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1e9eedc314
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Factored out the PCM track since it's going to be a useful construct for almost every file format. Documented it a little better.
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2016-07-10 18:36:52 -04:00 |
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Thomas Harte
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66895d3ac7
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Actually, I think this is the correct conversion from received speed to clock rate. It'll become obvious if it's not when I get back to working on the 1541 itself.
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2016-07-10 18:24:12 -04:00 |
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Thomas Harte
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19ee430d4a
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Made an effort to support zoned tracks, at least.
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2016-07-10 18:07:53 -04:00 |
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Thomas Harte
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ada2f073e0
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Completed handing of the disk all the way to the 1540.
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2016-07-10 16:24:46 -04:00 |
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Thomas Harte
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6593caca93
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Switched to a probably more helpful way around of expecting bits in bytes.
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2016-07-10 16:21:52 -04:00 |
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Thomas Harte
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845a00ccef
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Attempted via linear search to implement PCMTrack::get_next_event.
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2016-07-10 16:17:25 -04:00 |
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Thomas Harte
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f9510c1b67
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Put sufficiently much of PCMTrack into place to get to a stored list of segments, having determined a common clock rate between them and therefore a complete track length.
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2016-07-10 16:10:05 -04:00 |
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Thomas Harte
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4ae9f5ad5d
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Added preliminaries of reading the speed zone information.
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2016-07-10 13:42:45 -04:00 |
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Thomas Harte
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8ae78ba4e0
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Fixed signature check and fseek parameter order.
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2016-07-10 13:32:59 -04:00 |
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Thomas Harte
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6cfc514c2d
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Made the rote changes necessary to attempt to open and to supply a G64 to the Vic.
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2016-07-10 12:57:17 -04:00 |
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Thomas Harte
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ff49857f5c
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Started sketching out support for the G64 file format.
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2016-07-10 10:17:53 -04:00 |
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Thomas Harte
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9e3d6b762b
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Sketched out the generic interface for a disk, documenting it and the tape interface while I'm here.
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2016-07-10 08:54:39 -04:00 |
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Thomas Harte
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cf83258eaf
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Merge pull request #39 from TomHarte/1540
Starts work on the serial bus and preparatory work for a 1540 emulation
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2016-07-10 08:06:04 -04:00 |
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Thomas Harte
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11cd541786
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Fixed accidental indentation.
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2016-07-10 08:05:05 -04:00 |
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Thomas Harte
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4ca6883f7c
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Disabled attachment of a 1540 again, as I probably need to move to opening an actual disk image next.
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2016-07-10 08:03:36 -04:00 |
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Thomas Harte
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824d9ea92b
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Added further comments.
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2016-07-10 08:01:16 -04:00 |
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Thomas Harte
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d8334edf4a
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Started trying to clean up, including commuting the C1540 source file name to match its class name but mainly by adding documentation.
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2016-07-10 07:46:20 -04:00 |
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Thomas Harte
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c0ab45a73d
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Disabled a bunch of the caveman debug logging.
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2016-07-09 22:29:11 -04:00 |
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Thomas Harte
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f589d639db
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Okay, so it seems that sync also works the other way around.
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2016-07-09 22:25:44 -04:00 |
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Thomas Harte
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693c8b2438
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After all that, it seems likely that inputs just aren't inverted for the Vic.
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2016-07-09 20:03:38 -04:00 |
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Thomas Harte
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656cd211d7
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Was transmitting bit levels backwards (probably?); 1540 now acknowledges byte received.
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2016-07-09 18:06:49 -04:00 |
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Thomas Harte
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01746f0512
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This is probably a valid test. But I'm not completely sure. Time to figure out what's happening on the 1540 end.
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2016-07-09 18:01:04 -04:00 |
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Thomas Harte
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cd84c35552
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Whoops, one bit too short.
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2016-07-09 17:51:46 -04:00 |
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Thomas Harte
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cd362b46b3
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This is a valid attempt to send a whole byte, I think.
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2016-07-09 17:51:04 -04:00 |
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Thomas Harte
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3560babd7e
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Got back to a failing test, now while trying to transmit a whole byte. Good stuff!
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2016-07-09 17:39:51 -04:00 |
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Thomas Harte
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66caa3c6dc
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Fixed setup of bridge class.
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2016-07-09 17:23:43 -04:00 |
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Thomas Harte
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bf03985ea4
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Here's an instantly failing test...
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2016-07-09 17:22:10 -04:00 |
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Thomas Harte
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da6fe2e983
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This should be enough of a shell to write some actual tests.
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2016-07-09 15:47:53 -04:00 |
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Thomas Harte
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865eb421cd
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Quick on-disk tidy up.
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2016-07-09 15:44:55 -04:00 |
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Thomas Harte
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7cc4bf3fe7
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Hit and hope is getting me nowhere. Time to unit test this thing.
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2016-07-09 15:40:25 -04:00 |
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Thomas Harte
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8827597363
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Messier and messier, but I've at least attempted to implement hardware attention acknowledge.
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2016-07-08 19:00:39 -04:00 |
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Thomas Harte
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9a08ef61cb
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Still fumbling in the margins: made an effort not to imply that the 1540 is forever reading syncs.
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2016-07-07 22:13:18 -04:00 |
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Thomas Harte
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199c0e27e0
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Mostly just random guesses now, to be honest. It's approaching the end of my window for the morning.
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2016-07-07 07:16:36 -04:00 |
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Thomas Harte
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81e6cc34e5
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Per the ROM disassembly, the Vic's VIA outputs are inverted for the benefit of the serial bus.
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2016-07-07 06:57:21 -04:00 |
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Thomas Harte
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c9479f923b
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The inversion of truth was clearly just a problematic API. Got explicit. LineLevel might need to become more pervasive.
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2016-07-07 06:44:13 -04:00 |
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Thomas Harte
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dcb86a027a
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Okay, so the 1540 doesn't toggle the actual attention line. I don't know what it does yet but this helps.
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2016-07-06 22:31:14 -04:00 |
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Thomas Harte
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1baf21827c
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Since the ROM is well disassembled, let's actually try to be a 1541 first.
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2016-07-06 22:17:32 -04:00 |
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Thomas Harte
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4f174786b5
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Fixed potential buffer overrun.
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2016-07-06 21:39:09 -04:00 |
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Thomas Harte
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f64cd8cfcb
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Quick fixes properly to declare the DriveVIA, to ensure its interrupts take effect, and to wire ATN IN to CA1 rather than CB2.
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2016-07-06 20:22:46 -04:00 |
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Thomas Harte
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428fcdb978
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Centralised and improved serial logging.
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2016-07-06 07:46:21 -04:00 |
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Thomas Harte
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8819711bc8
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Threw in the second VIA as a currently clearly incorrect thing.
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2016-07-05 22:22:09 -04:00 |
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Thomas Harte
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602e7f01c7
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Control lines seem to have evolved to pure push.
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2016-07-05 21:15:29 -04:00 |
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Thomas Harte
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93c2bb80a2
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Improved a comment, added independent C[A/B]2 input mode.
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2016-07-05 21:11:51 -04:00 |
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Thomas Harte
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6c4fa4ec5d
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Improved commenting and initial state communication.
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2016-07-05 20:57:31 -04:00 |
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Thomas Harte
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1e6d90de17
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Made an attempt properly to deal with initial bus state.
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2016-07-05 20:52:33 -04:00 |
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Thomas Harte
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1bb109a23b
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Made a quick attempt at basic C[A/B]2 interrupts.
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2016-07-05 20:39:15 -04:00 |
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Thomas Harte
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c3b7d24293
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It appears that the attention line is also wired to CB2. So the ball is back in the 6522's court.
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2016-07-05 19:19:46 -04:00 |
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