Thomas Harte
|
63f39608a6
|
Added just enough to get back to a working build.
|
2016-07-15 20:35:19 -04:00 |
|
Thomas Harte
|
165dbd9651
|
Started fleshing this out a bit. Hopefully.
|
2016-07-15 08:28:34 -04:00 |
|
Thomas Harte
|
0aa90b943b
|
Switched to specifying bit length as a quotient for the purposes of a PCMSegment and verified that I had the logic for picking a Commodore time zone backwards: bigger numbers are faster, not slower.
Started sketching out a DiskDrive class.
|
2016-07-15 06:51:11 -04:00 |
|
Thomas Harte
|
74817f6664
|
With a history of three pulses, this can track up a 10% sine variation in a 1010101 stream. So I guess this'll do for now?
|
2016-07-14 19:54:48 -04:00 |
|
Thomas Harte
|
6afd619791
|
Eliminated floating point arithmetic.
|
2016-07-14 19:47:00 -04:00 |
|
Thomas Harte
|
6b4fec37ff
|
Moved down to a single divide.
|
2016-07-14 19:45:08 -04:00 |
|
Thomas Harte
|
481475a0f4
|
Switched to a full-on linear regression. Which causes the current tests to pass.
|
2016-07-14 19:42:01 -04:00 |
|
Thomas Harte
|
6d6b26b99f
|
Actually made things worse.
|
2016-07-14 07:32:27 -04:00 |
|
Thomas Harte
|
d8d3464c56
|
Made a quick-hack attempt at PLL synchronisation. Which doesn't work.
|
2016-07-14 07:31:23 -04:00 |
|
Thomas Harte
|
ac1bc588dd
|
Improved factoring and increased window of testing, causing both the fast and slow tests to show framing errors.
|
2016-07-14 07:12:02 -04:00 |
|
Thomas Harte
|
d1fe07f14d
|
Added test of perfect DPLL input timing.
|
2016-07-12 21:42:23 -04:00 |
|
Thomas Harte
|
94db45456e
|
Started sketching out the basic form here, albeit that it doesn't yet do _the only thing it advertises itself as useful for_.
|
2016-07-12 20:23:56 -04:00 |
|
Thomas Harte
|
75d95c0bc0
|
Sketched out an interface for a digial PLL. Not persuaded yet. Baby steps.
|
2016-07-11 22:12:58 -04:00 |
|
Thomas Harte
|
d0200b6fd9
|
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
|
2016-07-10 18:37:44 -04:00 |
|
Thomas Harte
|
1e9eedc314
|
Factored out the PCM track since it's going to be a useful construct for almost every file format. Documented it a little better.
|
2016-07-10 18:36:52 -04:00 |
|
Thomas Harte
|
66895d3ac7
|
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.
|
2016-07-10 18:24:12 -04:00 |
|
Thomas Harte
|
19ee430d4a
|
Made an effort to support zoned tracks, at least.
|
2016-07-10 18:07:53 -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
|
6593caca93
|
Switched to a probably more helpful way around of expecting bits in bytes.
|
2016-07-10 16:21:52 -04:00 |
|
Thomas Harte
|
845a00ccef
|
Attempted via linear search to implement PCMTrack::get_next_event.
|
2016-07-10 16:17:25 -04:00 |
|
Thomas Harte
|
f9510c1b67
|
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.
|
2016-07-10 16:10:05 -04:00 |
|
Thomas Harte
|
4ae9f5ad5d
|
Added preliminaries of reading the speed zone information.
|
2016-07-10 13:42:45 -04:00 |
|
Thomas Harte
|
8ae78ba4e0
|
Fixed signature check and fseek parameter order.
|
2016-07-10 13:32:59 -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
|
ff49857f5c
|
Started sketching out support for the G64 file format.
|
2016-07-10 10:17:53 -04:00 |
|
Thomas Harte
|
9e3d6b762b
|
Sketched out the generic interface for a disk, documenting it and the tape interface while I'm here.
|
2016-07-10 08:54:39 -04:00 |
|
Thomas Harte
|
cf83258eaf
|
Merge pull request #39 from TomHarte/1540
Starts work on the serial bus and preparatory work for a 1540 emulation
|
2016-07-10 08:06:04 -04:00 |
|
Thomas Harte
|
11cd541786
|
Fixed accidental indentation.
|
2016-07-10 08:05:05 -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
|
01746f0512
|
This is probably a valid test. But I'm not completely sure. Time to figure out what's happening on the 1540 end.
|
2016-07-09 18:01:04 -04:00 |
|
Thomas Harte
|
cd84c35552
|
Whoops, one bit too short.
|
2016-07-09 17:51:46 -04:00 |
|
Thomas Harte
|
cd362b46b3
|
This is a valid attempt to send a whole byte, I think.
|
2016-07-09 17:51:04 -04:00 |
|
Thomas Harte
|
3560babd7e
|
Got back to a failing test, now while trying to transmit a whole byte. Good stuff!
|
2016-07-09 17:39:51 -04:00 |
|
Thomas Harte
|
66caa3c6dc
|
Fixed setup of bridge class.
|
2016-07-09 17:23:43 -04:00 |
|
Thomas Harte
|
bf03985ea4
|
Here's an instantly failing test...
|
2016-07-09 17:22:10 -04:00 |
|
Thomas Harte
|
da6fe2e983
|
This should be enough of a shell to write some actual tests.
|
2016-07-09 15:47:53 -04:00 |
|
Thomas Harte
|
865eb421cd
|
Quick on-disk tidy up.
|
2016-07-09 15:44:55 -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 |
|