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Author SHA1 Message Date
Thomas Harte
9521718120 Colour phase is multiplied by 255, not 256. 2017-01-08 17:21:26 -05:00
Thomas Harte
28909e33ca Eliminated phaseCyclesPerTick as implied. 2017-01-08 16:48:02 -05:00
Thomas Harte
79632b1d34 Instituted de-escalating phase-related extensions, definitively to kill rounding error edges. 2017-01-08 16:24:22 -05:00
Thomas Harte
cf6d03e35c Merge branch 'master' into PhaseAlignedSampling 2017-01-08 14:49:40 -05:00
Thomas Harte
4a4b31a15c Merge pull request #94 from TomHarte/ElectronDisks 
Fixes the Electron's ability automatically to launch a disk
 2017-01-08 14:48:58 -05:00
Thomas Harte
f3d9aec8fc Fixed Electron's support for automatically booting floppy disks. 2017-01-08 14:47:41 -05:00
Thomas Harte
7ad64ff16b Made further efforts to support throughput via memory barrier. 2017-01-08 14:47:16 -05:00
Thomas Harte
6153ada33b Fixed Electron's support for automatically booting floppy disks. 2017-01-08 14:46:19 -05:00
Thomas Harte
be48c950b4 Started taking steps towards using a texture barrier where possible to reduce all of my framebuffer binds. Some output appears, but it's not correct. 2017-01-08 11:13:20 -05:00
Thomas Harte
0487b8c178 Definitively eliminated the additional y filtering step; if I'm going to work to ensure always four samples per colour cycle, I can put the channel separation coefficients directly into their shaders, cutting down on samples. 2017-01-07 16:02:33 -05:00
Thomas Harte
5740015f56 Temporarily disabled composite processing to show the pure stream. Fixed both automatic calculations of phase — per line and, at input, per pixel. 2017-01-07 12:38:00 -05:00
Thomas Harte
c84004bfa3 Fixed: colour_cycle_numerator_ doesn't need to be multiplied by the time multiplier because it'll get that for free from the calculation of next_run_length. 2017-01-06 21:36:19 -05:00
Thomas Harte
c746a3711f Temporarily disabled my attempt to be clever with bilinear filtering when applying a lowpass filter. Will need to investigate. 2017-01-04 08:06:18 -05:00
Thomas Harte
aa7774a9a6 Experimental: up the chroma accuracy, just let the luma go straight through. Subject to figuring out how I'm still losing so much precision. 2017-01-03 22:41:34 -05:00
Thomas Harte
a836120945 Restored proper colour separation, but somewhere a massive hit in horizontal resolution is happening — much greater than one would expect from the sample size picked. So investigation to come. 2017-01-03 22:32:07 -05:00
Thomas Harte
7d60df9075 Added the option for both intermediate and output shaders to use only a portion of the input/output texture; made an attempt to pick an appropriate proportion in order to align signal sampling with the colour subcarrier. 2017-01-03 22:16:52 -05:00
Thomas Harte
f2b8b26bc4 Started throwing some comments into my shaders. 2017-01-03 21:16:38 -05:00
Thomas Harte
9d60172571 Merge pull request #93 from TomHarte/ReadWriteTrack 
Implements the Type 3 WD177x commands
 2017-01-01 21:01:56 -05:00
Thomas Harte
eca3995481 Added a CRC check for read address, ensured CRC, lost data and record not found are initially reset. 2017-01-01 21:00:25 -05:00
Thomas Harte
044c920a5b Made it more explicit that there are no unhandled cases. 2017-01-01 20:56:52 -05:00
Thomas Harte
0df9ce5a76 Made an attempt at read address. So superficially that leaves only the force interrupts. 2017-01-01 20:55:09 -05:00
Thomas Harte
f94f34f053 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. 2017-01-01 20:39:19 -05:00
Thomas Harte
4ad2d2bedd Merge branch 'master' into ReadWriteTrack 2017-01-01 20:04:22 -05:00
Thomas Harte
e28f72d919 Merge pull request #90 from TomHarte/TravisCI 
Introduces a shared Xcode scheme plus a first attempt at Travis CI integration
 2017-01-01 20:03:26 -05:00
Thomas Harte
c994fa39f6 Ensured spin-up doesn't occur if there's no motor line. 2016-12-31 16:18:30 -05:00
Thomas Harte
1ea4f0d79d Made an attempt to implement 'write track' and ensure that 'write sector' can't end without announcing that it has ended writing. 2016-12-31 16:01:44 -05:00
Thomas Harte
0689df1349 Merge pull request #92 from TomHarte/MFMCleanup 
Adds some documentation and tidies some of the new MFM infrastructure
 2016-12-31 15:32:11 -05:00
Thomas Harte
b3c33d993a Made an attempt to explain the requirements placed upon Disk subclasses that wish to support writing. 2016-12-31 15:30:48 -05:00
Thomas Harte
8eb21c6702 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. 2016-12-31 15:25:11 -05:00
Thomas Harte
4c62487e6e Merge pull request #91 from TomHarte/TableCRC 
Switches to a table-based implementation of CRC generation
 2016-12-31 14:16:17 -05:00
Thomas Harte
a147d56ce6 Switched to a table-based implementation of CRC generation, adding construction cost to cheapen running cost. 2016-12-31 14:15:20 -05:00
Thomas Harte
7b696b0962 Switched scheme to shared. 2016-12-31 13:11:07 -05:00
Thomas Harte
57bb771fb7 It looks like spaces are automatically escaped (?) 2016-12-31 13:05:55 -05:00
Thomas Harte
5201a59c44 Attempted to introduce Travis CI. 2016-12-31 13:03:32 -05:00
Thomas Harte
df6e98fa52 Merge pull request #89 from TomHarte/OricDiskWrites 
Adds write support for the Oric .DSK file format
 2016-12-31 12:53:43 -05:00
Thomas Harte
52b850a3f5 Quick extra: make sure parsed tracks don't overflow the 6400 byte space available in an MFM disk. Which might be better expressed as 6250? 2016-12-31 12:51:52 -05:00
Thomas Harte
cfbab1448c Switched to a track parsing that disallows synchronisation values within sector contents. 2016-12-31 12:23:08 -05:00
Thomas Harte
12549ff412 Might as well get the file offset before entering the critical section; also moved the lock guard down more explicitly to group with the second set of actions. 2016-12-31 11:48:46 -05:00
Thomas Harte
6f0b5427e4 Made an attempt to avoid repetition of sync bytes. 2016-12-31 00:20:00 -05:00
Thomas Harte
0123b37213 Made an attempt to include sync values in the stream and properly to align. 2016-12-31 00:11:31 -05:00
Thomas Harte
ea4d85e1cd The virtual disk constructed is the same across all tracks. So why not just request zero? 2016-12-31 00:10:35 -05:00
Thomas Harte
f217d508b8 Completed first attempt at write support for Oric disk images. 2016-12-30 23:12:46 -05:00
Thomas Harte
1f625fad66 Decided that if this is an [M]FM parsing function then it should be something more intelligent than a mere PLL record. Which I guess conveniently implies Oric DSK-esque behaviour. But properly defined, rather than very vaguely. 2016-12-30 23:10:52 -05:00
Thomas Harte
632b3c63b1 Added the infrastructure necessary for Oric disks to appear writeable to the machine and to receive changed tracks. 2016-12-30 22:51:48 -05:00
Thomas Harte
d581294479 Added get_track to get the PLL output for a complete track. 2016-12-30 19:59:23 -05:00
Thomas Harte
0f399b0a0c Made type conversion explicit. 2016-12-30 19:59:01 -05:00
Thomas Harte
c6fcc40ac5 Merge pull request #88 from TomHarte/WDWrites 
Implements write support for the WD.
 2016-12-30 18:11:00 -05:00
Thomas Harte
3b29e6a473 Ensured SSD and ADFs are grown if required. 2016-12-30 18:08:12 -05:00
Thomas Harte
07dacff42d Added writing for Acorn ADF disks, plus appropriate TODOs in both similar bits of boilerplate. 2016-12-30 18:03:30 -05:00
Thomas Harte
c85450648f Fix: make sure copies have proper event lengths. Also made it much clearer what's going on with the initial copy to the heap. 2016-12-30 17:55:46 -05:00