Thomas Harte
4952657b31
Factors out physical to logical sector conversion.
2018-05-19 22:59:59 -04:00
Thomas Harte
46fae1a761
Corrected: now maps in the proper direction.
2018-05-19 22:50:33 -04:00
Thomas Harte
a09fb01d71
Makes an attempt at write support for Apple DSK files.
2018-05-19 22:30:52 -04:00
Thomas Harte
7cee3b7449
Resolves potential overflow / sign corruption.
2018-05-19 22:28:29 -04:00
Thomas Harte
8263c48a1d
Added a guarantee that the TrackSerialiser won't modify tracks it receives.
2018-05-18 23:03:28 -04:00
Thomas Harte
ed06533e60
Implements write support out of the Disk II.
2018-05-18 22:07:58 -04:00
Thomas Harte
7b7beb13a3
Eliminates the fiction of setting and getting registers.
...
The Disk II seems lower level than that; it will read the data bus whenever it likes, it is the programmer's responsibility to keep up with that. It also reserves the right not to load the bus regardless of whether it receives a read or write access.
2018-05-17 21:39:11 -04:00
Thomas Harte
85c4e009f3
Undoes reformatting error.
2018-05-14 20:03:32 -04:00
Thomas Harte
76802b5e38
Eliminates arc4random.
...
It seems not to be as portable as I'd hoped.
2018-05-14 20:01:20 -04:00
Thomas Harte
9f2f388e5a
Ensures generation of random noise if too many zeroes exist on a disk surface.
2018-05-14 19:17:34 -04:00
Thomas Harte
7996040f35
Rejigs segment conjugation to avoid potential accidental empty byte.
2018-05-13 22:30:44 -04:00
Thomas Harte
0055efb720
Corrects failure of expression in track size expansion.
2018-05-13 22:29:36 -04:00
Thomas Harte
84ae2964fd
Switches to explicit unicode entry points.
2018-05-13 16:02:46 -04:00
Thomas Harte
149b940f84
Commutes the pound sign to a proper unicode value.
2018-05-13 15:50:56 -04:00
Thomas Harte
7226d8d4f7
Eliminates all instances of µ.
2018-05-13 15:46:14 -04:00
Thomas Harte
ad9b0cd4e3
Eliminates all endashes.
2018-05-13 15:43:03 -04:00
Thomas Harte
5d6b5d9f10
Eliminates all emdashes in cross-platform code.
2018-05-13 15:34:31 -04:00
Thomas Harte
0b771ce61a
Removes all instances of the copyright symbol.
2018-05-13 15:19:52 -04:00
Thomas Harte
3fdefb94e4
Removes requirement for correct sector epilogues.
...
It's now a length test that at present accepts 6-and-2 sectors only.
2018-05-12 23:03:08 -04:00
Thomas Harte
49592ebaf3
Ensures initialisation of scanner and that sectors overlapping the end of track are captured.
2018-05-12 18:42:07 -04:00
Thomas Harte
f410dcb3f3
Ensures proper test: not having a number of sectors that is a multiple of the track count.
2018-05-12 18:05:33 -04:00
Thomas Harte
0cb5362c6f
Disambiguates whether Step will occur in addition to below zero/beyond maximum.
2018-05-11 21:44:08 -04:00
Thomas Harte
9089bf6535
Adds step events.
2018-05-10 21:58:14 -04:00
Thomas Harte
ef19a03efc
Drives can now deliver activity events.
2018-05-10 21:54:10 -04:00
Thomas Harte
25f7e3af31
Removes dead debugging aid. What a klutz!
2018-05-09 22:24:20 -04:00
Thomas Harte
8ee34fafa6
Switches default DSK volume to 254. That seems to resolve Pravetz booting issues.
2018-05-09 20:28:58 -04:00
Thomas Harte
f65c65569a
Makes disk head position explicitly something with sub-integral precision.
...
Also as a drive-by fix, corrects accidental assumption of 10 sectors for all MFMSectorDump descendants.
2018-05-06 23:17:36 -04:00
Thomas Harte
36f8b165cf
Makes the epilogue test a bit more thorough.
2018-05-05 20:52:42 -04:00
Thomas Harte
1293d8b69e
Corrects various indentation errors.
2018-05-05 19:32:20 -04:00
Thomas Harte
ba7fbc4032
Reroutes all Disk II types through the Disk II analyser and returns actual sector from the Apple GCR parser results.
2018-05-05 16:37:33 -04:00
Thomas Harte
c36d7b4972
Makes first attempt at 6 and 2 decoder.
2018-05-04 23:11:12 -04:00
Thomas Harte
0dece80b5d
Improves documentation.
2018-05-04 18:02:55 -04:00
Thomas Harte
e3b4aebf1a
Introduces the Disk II as a unique media target platform.
...
As it makes a little more sense to analyse Apple GCR images to determine target platform than it does to have the potential platforms vote over them.
Also starts on the parser that'll be necessary for making a decision.
2018-05-04 18:02:36 -04:00
Thomas Harte
2e20191c01
Relocates and cleans up what is currently written of Apple GCR handling as the encoder.
...
A decoder will be forthcoming.
2018-05-03 22:40:45 -04:00
Thomas Harte
fcc750784a
Switches interleaving logic around: having inspected some NIBs sectors are numbered in order, but scatter read from the image.
2018-05-02 21:28:18 -04:00
Thomas Harte
3787d094ec
Deals with potential precision pitfall.
2018-05-02 21:26:39 -04:00
Thomas Harte
4b4ea4a103
Corrects final two bytes of Apple GCR low nibble encoding.
2018-05-02 21:06:18 -04:00
Thomas Harte
5e34c1b6b8
Switches to producing a single segment for NIBs and DSKs.
...
I've now seemingly verified that the values read back by the CPU are those I'm intending to produce, so I'm at a loss.
2018-05-01 20:31:42 -04:00
Thomas Harte
f4097290c2
Made various corrections following a quick for-loop constness audit.
2018-04-30 22:23:57 -04:00
Thomas Harte
9da481b060
Slightly simplifies syntax.
2018-04-30 22:08:51 -04:00
Thomas Harte
79002d6962
Adds an additional assert.
2018-04-30 22:07:54 -04:00
Thomas Harte
dbd9282efc
Experimentally switches to doubles for TimedEventLoop time tracking.
2018-04-30 22:07:17 -04:00
Thomas Harte
10c0e687f5
Attempts to introduce sleeping for the Disk II.
2018-04-29 17:51:10 -04:00
Thomas Harte
a9d4fe0b41
Introduces filetype wiring for DO and PO files.
...
Also corrects sector numbering logic to ensure there is a sector 15.
2018-04-29 16:34:10 -04:00
Thomas Harte
5cd15147eb
Introduces interleaving of sector numbers.
2018-04-29 16:18:14 -04:00
Thomas Harte
c62db6665a
Corrects storage of lower two bit pairs.
...
It turns out the non-integral result of 256/3 is handled differently than my guess.
2018-04-29 11:20:23 -04:00
Thomas Harte
fabcb261dc
Corrects data prologue usage and off-by-one error in checksum placement.
2018-04-28 23:17:06 -04:00
Thomas Harte
45cf28e0eb
Corrects sync lengths.
2018-04-28 15:48:49 -04:00
Thomas Harte
5b35c88be2
Corrections: data segments now correctly announce their number of bits, and tracks aren't oversized.
2018-04-28 15:47:50 -04:00
Thomas Harte
7f03f5d02f
Makes a first attempt at six-and-two encoding for DSKs.
2018-04-28 15:18:48 -04:00
