David Given
a075694d8e
Rewrite the sequencer to work with the new six bit bytecode. Fiddle with the
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USB stuff a lot in an attempt to resolve the weird packet loss issue.
2020-03-29 15:10:35 +02:00
David Given
b1ea5a9a35
Rework the writer to use a fluxsink rather than just writing stuff directly.
2020-03-29 15:08:45 +02:00
David Given
00087cbb6b
Fix a catastrophic DMA setup bug which was causing (probably) every other byte
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of data to be mixed up with every other byte... but as every other byte was a
0x80 we never noticed up until now.
2020-03-20 00:06:58 +01:00
David Given
1b48ea20c4
Remove the cruncher.
2020-03-20 00:06:07 +01:00
David Given
3d0f019fc4
Replace the sampler with one using the new simplified bytecode.
2020-03-19 23:39:23 +01:00
David Given
a08bfc183f
Display the tick value along with each interval in the histogram.
2020-03-19 22:16:07 +01:00
David Given
c5aef9b051
Annotate inspect to display USB bandwidth.
2020-03-15 13:47:17 +00:00
David Given
fc2655ecd6
Rework the bytecode format to use a much simplified setup: a six-bit timer with
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the top two bits reserved for pulse and index state. This is actually smaller,
bandwidth-wise, than the old version, and may be smaller than the crunched
version.
2020-03-14 18:58:43 +00:00
David Given
a401173f6d
Teach the Amiga decoder how many sectors to expect on each track.
2020-03-09 12:54:29 +00:00
David Given
ce76dc4279
Merge pull request #140 from davidgiven/sectors
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Fix a couple of annoying but minor issues
2020-02-28 00:08:11 +01:00
David Given
1025bd857b
Don't crashloop if the USB's not connected, as it causes the drives to be
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constantly reprobed (which runs the motor).
2020-02-27 22:32:27 +01:00
David Given
025802b2d0
Count required sectors correctly on mac disks.
2020-02-27 22:30:05 +01:00
David Given
adbcb2cd31
Merge pull request #139 from davidgiven/sectors
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Add support for required sectors, drive autodetection and fix homing on 8" drives.
2020-02-24 21:55:27 +01:00
David Given
c47a563790
Don't seek to track -1 on homing (it appears to upset 8" drives). Detect which
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drives are present, so that if only a single drive is attached then it's always
track 0, regardless of which connector it's on.
2020-02-24 21:47:40 +01:00
David Given
04c09d1a5b
Hopefully, fix the problem where ^Cing a job gets the board in a confused
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state.
2020-02-21 22:16:20 +01:00
David Given
323da8272a
Hopefully add support for giving the reader a set of required sectors, so if
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one is missing then we can tell and the track can be reread.
2020-02-21 22:14:44 +01:00
David Given
38700c79fc
Merge pull request #137 from davidgiven/docs
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Update documentation.
2020-02-20 00:32:19 +01:00
David Given
d504d1890a
Remember to document that you need a FDD cable.
2020-02-20 00:30:17 +01:00
David Given
d53e757cfb
Rework some of the Brother documentation.
2020-02-20 00:25:55 +01:00
David Given
4983239458
Rework the hardware and software documentation.
2020-02-20 00:17:16 +01:00
David Given
376985828a
Add the ditaa pinout table.
2020-02-19 23:49:43 +01:00
David Given
dce0a26820
Merge pull request #136 from davidgiven/ibm
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Finally add write support for IBM disks.
2020-02-18 23:20:57 +01:00
David Given
14e0a67e7d
IBM write support gets the much vaunted unicorn.
2020-02-18 23:10:09 +01:00
David Given
1656947764
Disable write precompensation, as it actually seems to make things worse.
2020-02-18 22:49:12 +01:00
David Given
647862cdbd
Update the firmware for the new cruncher.
2020-02-18 22:13:41 +01:00
David Given
4a8d83838c
Add IBM write support documentation.
2020-02-18 22:12:56 +01:00
David Given
8acf8e181d
Rework the crunch encoding to be, hopefully, smaller and use less bandwidth for
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HD disks.
2020-02-18 21:37:32 +01:00
David Given
2df9920209
Rename test bulktransport to test bandwidth; avoid watchdog failures while the
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bandwidth test is running.
2020-02-18 19:12:52 +01:00
David Given
1a6c6b5420
The bandwidth tester now tests bandwidth in both directions. It looks like my
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default USB port only gets about 500kB/s write bandwidth. However, when plugged
into a port with 850kB/s, I still get underrun errors...
2020-02-17 23:58:40 +01:00
David Given
edc56d44d6
Non-functioning archive checkin: You can only have 120-odd DMA buffers, so my
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last 'fix' was in fact non-functional.
2020-02-17 23:28:40 +01:00
David Given
ef4eff0195
So writing now works, but only if USB DMA is enabled. But that breaks reading.
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I've worked round this in a simple but brute force manner and it now looks as
if reading *and* writing work, more or less. There does still seem to be the
odd bad sector when writing 1440kB disks.
2020-02-17 21:41:01 +01:00
David Given
df8d45bf66
Rework the output fifo to be a bit more correct about the sync signals, which
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in turn allows the sequencer to lose less time --- this gets the effective
clock rate down to about 1.01us. However we still seem to lose the last sector
on 18-sector disks and there are some disk reads so something is still wrong.
2020-02-17 00:13:13 +01:00
David Given
89a27619ff
Correctly propagate MFM encoding state.
2020-02-15 21:47:01 +01:00
David Given
387a86969a
Some verilog optimisations which shave off a few p-terms.
2020-02-15 12:15:51 +01:00
David Given
acb5059d17
Rewrite the sampler *again* to, hopefully, be more stable and not lose ticks.
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Luckily, we have just enough space in the FPGA to use an actual logic counter,
which simplifies things hugely.
2020-02-15 12:09:19 +01:00
David Given
a4002d2617
Fix a few encoder issues; but while 720kB disks work fine in a real machine,
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1440kB disks don't.
2020-02-14 22:47:15 +01:00
David Given
a63a90bbd0
Only attempt to remove the old file on overwrite if it actually exists.
2020-02-14 22:30:46 +01:00
David Given
d25f96dd24
The IBM encoder now works well enough that my USB floppy drive thinks the disk
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is formatted... but has trouble reading sectors above about 1000. Also remember
that encoding MFM needs to keep one bit of state at all times.
2020-02-14 00:06:51 +01:00
David Given
e8febe6508
Allow converting Bytes to bits, and slicing until the end of an object.
2020-02-14 00:04:31 +01:00
David Given
ad3a930c6a
Do the boilerplate of the IBM encoder.
2020-02-09 23:56:20 +01:00
David Given
be41c1de76
You now need to explicitly specify whether flux files get merged or
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overwritten, because the old behaviour was weird. Reader uses SqliteFluxSink to
write flux files, rather than raw database accesses.
2020-02-08 12:41:50 +01:00
David Given
d528978667
Merge pull request #135 from davidgiven/docs
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Update docs.
2020-02-08 11:53:31 +01:00
David Given
827fcf69d2
Another typo fix.
2020-02-08 11:52:39 +01:00
David Given
711ff545e0
Typo fix.
2020-02-08 11:51:19 +01:00
David Given
5befa31050
Document the GreaseWeazle.
2020-02-08 11:50:09 +01:00
David Given
8e5c2d0ebb
Merge from trunk.
2020-02-08 11:35:31 +01:00
David Given
f95fceeb3d
Finally document IBM disks.
2020-02-08 11:34:57 +01:00
David Given
003b20dbf0
Merge pull request #133 from davidgiven/fixing
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Display RPM values correctly
2020-01-29 00:52:04 +01:00
David Given
cd9bbaa4b6
Merge from trunk.
2020-01-29 00:42:06 +01:00
David Given
71e622bf72
Fix the fe-rpm RPM display, which didn't get updated when we switched to
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nanoseconds internally.
Fixes #132
2020-01-29 00:41:58 +01:00
