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
|
6ee784a893
|
Increased logging; discovered I was packing events together too closely. Now getting some zeros.
|
2016-07-30 04:30:55 -04:00 |
|
Thomas Harte
|
fead524eb5
|
Attempted to give the PLL a litte extra leeway, and fixed PCMTrack length test.
|
2016-07-29 18:52:50 -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
|
6532b3a8c8
|
Filled in a calculation of clocks per bit that'll do.
|
2016-07-29 07:51:07 -04:00 |
|
Thomas Harte
|
f984de42a3
|
Took some small steps towards having a disk drive that at least can select a track and pump relevant events into a PLL.
|
2016-07-29 07:31:02 -04:00 |
|
Thomas Harte
|
0e581c7607
|
Factored out the stuff of running a timed event loop from the TapePlayer.
|
2016-07-29 07:15:46 -04:00 |
|
Thomas Harte
|
e55db0cfe8
|
Made an attempt to eliminate creeping tape processing accuracy misses, which implied factoring out the GCM and LCD functions, which I then felt didn't really amount to signal processing.
|
2016-07-29 05:19:01 -04:00 |
|
Thomas Harte
|
5c1614ce7b
|
Attempted to simplify, very slightly.
|
2016-07-28 14:35:39 -04:00 |
|
Thomas Harte
|
015cea494d
|
Switched to a much-more straightforward PLL. I think I'm just fiddling now rather than moving forwards. Probably time to move on?
|
2016-07-28 11:32:14 -04:00 |
|
Thomas Harte
|
e061e849d4
|
Had a second bash at the PLL. Probably I should read some of the literature.
|
2016-07-27 16:24:24 -04:00 |
|
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 |
|