Thomas Harte
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b0a7208cc7
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Strung together a very basic version of 8272 write [/deleted] data. Lots of cases as-yet unhandled.
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2017-08-13 12:50:07 -04:00 |
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Thomas Harte
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eec42aa7ae
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Entrusted further status to drives; also adjusted them to report read only if diskless, which I now believe to be correct.
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2017-08-13 11:50:49 -04:00 |
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Thomas Harte
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186048a88e
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Made an attempt to fix the condition for setting a broken header CRC.
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2017-08-12 16:39:32 -04:00 |
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Thomas Harte
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0c8769e335
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Just to be safe.
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2017-08-11 18:41:08 -04:00 |
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Thomas Harte
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83c7d34df2
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Switched to populating the sector cache with everything in a track the first time anything on that track is requested. That avoids the problem whereby each request of a non-existent sector costs two spins.
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2017-08-11 18:40:16 -04:00 |
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Thomas Harte
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a12671010a
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Sector size is now reported, and CRC failures are merely indicated, not cause for a sector to be thrown away.
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2017-08-11 16:23:33 -04:00 |
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Thomas Harte
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edb088526f
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Simplified slightly, and updated TODO as to still-missing functionality.
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2017-08-11 14:33:34 -04:00 |
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Thomas Harte
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80ebc63101
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Updated the SSD file format container to specify sector sizes, now that it's no longer implicit.
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2017-08-11 14:30:35 -04:00 |
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Thomas Harte
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cf1403bc79
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Increased documentation.
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2017-08-11 14:27:07 -04:00 |
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Thomas Harte
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fcf63a7547
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Expands the [M]FM encoder to respect some new Sector flags: it will now wilfully make CRC errors, omit data, include data that is different than the ID's declared length, write deleted data, and can be commanded as to header/data gaps and what should be within them. All based around expanding towards the needs for reproduction of the CPC's .DSK file format.
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2017-08-11 14:24:50 -04:00 |
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Thomas Harte
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0411b51582
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Added an attempt to deal with 16-bit allocation units, and to ensure middle-of-file holes are respected.
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2017-08-11 10:59:37 -04:00 |
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Thomas Harte
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026101a268
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Killed logic_extents_per_physical, since I don't know how to handle it, and instituted tracks, to allow a decision about short versus long allocation units.
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2017-08-11 10:46:50 -04:00 |
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Thomas Harte
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734099a956
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Threw a sector cache into my MFM parser, in an attempt to cut down analysis costs. Also made it aware of multiple heads.
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2017-08-11 10:29:13 -04:00 |
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Thomas Harte
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6be5851484
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Cleaned up.
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2017-08-10 22:34:29 -04:00 |
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Thomas Harte
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994179f188
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Taking a whole bunch of guesses, this might be correct.
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2017-08-10 22:33:08 -04:00 |
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Thomas Harte
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6a65c7a52a
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Started working on a CPC-oriented analyser; for now I just want to be able to make a good guess at the appropriate file to load from a disk. As it turns out, the CPC simply adopts the CP/M format, so a generic parser is appropriate. This is its beginning.
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2017-08-10 17:10:21 -04:00 |
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Thomas Harte
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7d1023ea98
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Added a 'ready' getter to Drive, formally to let the drive take ownership of that test.
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2017-08-08 21:15:56 -04:00 |
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Thomas Harte
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2b0dcf8573
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Transcribed the status bits that I think actually need to be obeyed.
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2017-08-07 12:37:45 -04:00 |
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Thomas Harte
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47732ffb98
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Prevented the 8272 from overreading ID fields (and, by doing so, overrunning its internal buffer). Exposed the MFMController's CRC generator for inspection.
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2017-08-07 12:37:22 -04:00 |
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Thomas Harte
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56d65ba6f3
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Adapted slightly, to retain the ability to advertise an incorrect size, to adjust the confusion I've created by having two different types of thing both called new_sector, and to print a warning when ignoring error flags.
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2017-08-07 12:12:04 -04:00 |
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Thomas Harte
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895a3cbf24
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Corrected reading of the track size table for extended disks. My first extended disk has now loaded.
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2017-08-07 11:38:19 -04:00 |
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Thomas Harte
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d951c8c1c2
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Fixed search for track start position with extended disks: it's no longer an infinite loop. So that's a pretty good performance improvement.
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2017-08-07 11:36:29 -04:00 |
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Thomas Harte
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a294963e98
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Made an absolutely basic attempt to accommodate some extended disk images.
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2017-08-07 11:26:15 -04:00 |
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Thomas Harte
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c839556a27
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Fixed: rewind the file to check for 'EXTENDED' if 'MV - CPC' failed.
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2017-08-06 19:47:10 -04:00 |
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Thomas Harte
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77da582e88
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Switched the container in which events are passed to int, with the intention of subclasses extending the receivable range.
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2017-08-06 12:35:20 -04:00 |
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Thomas Harte
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ffadb04761
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Documented, and removed a couple of Event types that are WD-specific but had accidentally flown into here. Will need to figure out how best to expose the CRC result too, but I'm willing to let that one drop out naturally as I implement the 8272.
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2017-08-06 11:36:36 -04:00 |
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Thomas Harte
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29288b690e
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Switched disk controllers to be instantiated explicitly in terms of cycles, created an Amstrad-specific subclass of the 8272 to record the direct programmatic availability of all disk motors bundled together, and otherwise adjusted to ensure the thing is clocked and that the motor is enabled and disabled appropriately. The 8272 is also now formally a subclass of the incoming MDM controller.
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2017-08-06 09:45:16 -04:00 |
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Thomas Harte
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4d60b8801c
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Started trying to factor out just the PLL stream -> FM/MFM events part that is presently in the WD1770.
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2017-08-05 22:26:15 -04:00 |
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Thomas Harte
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192f232d3f
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Silenced warnings.
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2017-08-05 11:53:29 -04:00 |
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Thomas Harte
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6e4d3b8a77
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Added enough logic to produce some sort of version of a completely unprotected DSK. So enough to start bootstrapping an FDC emulation, at least.
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2017-08-05 11:44:53 -04:00 |
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Thomas Harte
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8eda24261c
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Removed unnecessary header — it's implied by being a child of FileHolder.
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2017-08-05 11:44:06 -04:00 |
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Thomas Harte
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75c59fefab
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Added an empty husk to begin support for Amstrad CPC disk image formats.
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2017-08-05 10:02:10 -04:00 |
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Thomas Harte
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9d953421d8
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After a quick check, added a couple of other _delegate initialisations. I should probably find a way to template this.
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2017-08-01 07:07:43 -04:00 |
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Thomas Harte
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4abd62e62b
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Standardises on const [Half]Cycles as the thing called and returned, rather than const [Half]Cycles & as it's explicitly defined to be only one int in size, so using a reference is overly weighty.
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2017-07-27 22:05:29 -04:00 |
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Thomas Harte
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8361756dc4
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Switched definitively to the works-for-now approach of requiring an explicit opt-in where somebody wants to clock a whole-cycle receiver from a half-cycle clock.
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2017-07-27 07:40:02 -04:00 |
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Thomas Harte
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75d67ee770
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Relocated ClockReceiver.hpp as it's a dependency for parts of the static analyser, and therefore needs to be distinct from the actual emulation parts.
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2017-07-25 20:20:55 -04:00 |
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Thomas Harte
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a1e9a54765
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Eliminated redundant uses of ClockReceiver and sought to ensure that proper run_fors are inherited all the way down.
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2017-07-25 20:09:13 -04:00 |
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Thomas Harte
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8a2bdb8d22
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Converted the TimedEventLoop and the things that sit atop it into ClockReceivers.
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2017-07-24 21:19:05 -04:00 |
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Thomas Harte
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b3ae920746
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Converted the DPLL and disk controller classes to be ClockReceivers.
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2017-07-24 21:04:47 -04:00 |
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Thomas Harte
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45ec5f8eab
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Eliminated implicit sign conversion.
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2017-07-21 21:53:27 -04:00 |
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Thomas Harte
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1d01acce06
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Fixed differing types of loop variables and targets.
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2017-07-21 21:53:05 -04:00 |
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Thomas Harte
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163c0f1b44
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Ensured offset means exactly one thing.
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2017-07-21 20:58:17 -04:00 |
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Thomas Harte
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e5188a60dc
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Settled on the new average-of-length approach to a PLL window sizing, eliminating the old errors-of-phase approach. Since it anchors automatically to the original target clocks per bit, killed the explicit mention of a tolerance.
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2017-07-16 19:03:50 -04:00 |
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Thomas Harte
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e71d13c090
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With the new PLL implementation, switching to a deeper window size returns the Acorn tape parser to: working.
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2017-07-16 17:12:12 -04:00 |
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Thomas Harte
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51177e4e1f
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Attempted a different implementation of the PLL, that responds to changes only once.
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2017-07-16 16:49:04 -04:00 |
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Thomas Harte
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4489f120f9
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Eliminated foolish double indirection on phase history.
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2017-07-15 22:40:38 -04:00 |
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Thomas Harte
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e01f3f06c8
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Completed curly bracket movement.
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2017-03-26 14:34:47 -04:00 |
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Thomas Harte
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f94f34f053
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Made an attempt at read track. Which means process_input_bit can't just swallow syncs any more; it now reports them as tokens of type ::Sync.
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2017-01-01 20:39:19 -05:00 |
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Thomas Harte
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b3c33d993a
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Made an attempt to explain the requirements placed upon Disk subclasses that wish to support writing.
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2016-12-31 15:30:48 -05:00 |
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Thomas Harte
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8eb21c6702
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The "MFM...Byte"s aren't MFM-specific, they're relevant to both FM and MFM encoding. So renamed them. Also slimmed syntax within MFM.cpp mostly where emigration from the Acorn disk analyser had left a residue of lengthy namespace specification.
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2016-12-31 15:25:11 -05:00 |
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