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Author SHA1 Message Date
Thomas Harte
7680cbf9c3 Testing this Markdown implementation for image sizing support. 2017-01-23 20:26:57 -05:00
Thomas Harte
4920fe6701 Added a grab of the Repton title screen. 2017-01-23 20:23:49 -05:00
Thomas Harte
55fe0176bd Added a space. Probably need to hold for a better example though. 2017-01-12 22:12:37 -05:00
Thomas Harte
99fcbb55d1 Attempted to improve layout. 2017-01-12 22:11:25 -05:00
Thomas Harte
6f78ecd12b Added a small pictorial example. Hardly the best, but a step in the right direction. 2017-01-12 22:06:45 -05:00
Thomas Harte
ced644b103 It seems likely that an AY divides its clock by 8, not 16. I had conflated wave frequency and counter clock. 2017-01-11 22:03:01 -05:00
Thomas Harte
be1cb2a551 Fixed NTSC phase. 2017-01-11 21:31:24 -05:00
Thomas Harte
b4159295f6 Switched to using quads for intermediate draws. The specific concern is the flexibility offered in the GL spec as to line drawing algorithms. And even if a driver implements exactly to spec then it should omit the final pixel. 2017-01-11 21:18:41 -05:00
Thomas Harte
d0a93409e6 Made an attempt to simplify in-shader phase calculation, now that output position is a direct multiple of phase. 2017-01-11 08:18:00 -05:00
Thomas Harte
4c3669f210 Reduced precision of input phase, but I'm not necessarily persuaded by it as a move. However it's clear that something is off in that whole area. But if phase is locked by output position, do I need to retain this level of complexity? Also ensured that intermediate buffers prior to the final are sampled using the nearest sampling mode, also to reduce precision errors. 2017-01-10 22:08:07 -05:00
Thomas Harte
eeb646868b Switched off filtering, at least temporarily, to try to ensure that sampling is all where it should be. 2017-01-08 19:53:08 -05:00
Thomas Harte
3d789732a2 Switched back to full buffer clearing. Until I can figure out the source of noise. 2017-01-08 19:50:31 -05:00
Thomas Harte
d2a7d39749 Ensured the output lock isn't held while talking to the delegate. 2017-01-08 19:49:21 -05:00
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