Thomas Harte
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87496f9978
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Merge pull request #131 from TomHarte/ZX80FileFormats
Adds very preliminary emulation of the ZX80.
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2017-06-15 18:32:38 -04:00 |
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Thomas Harte
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d8e3103a2b
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Fixes: switched ZX80 and ZX81 timing to the correct way around, ensured that my wait takes effect if HALT **isn't** set, and made sure to recover from it.
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2017-06-13 21:48:17 -04:00 |
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Thomas Harte
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76a64d13a0
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Made a first attempt at ZX81 emulation.
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2017-06-13 21:25:55 -04:00 |
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Thomas Harte
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1e975859c2
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Started splitting ZX80 and ZX81 paths. Also the '80 fires its horizontal sync a little earlier than the '81, so pulled that back a little.
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2017-06-13 20:09:09 -04:00 |
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Thomas Harte
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4c5261bfa0
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Made first attempt to use the horizontal counter for something; here for sync timing only, even though I've gone exclusively with '81-style timing for now.
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2017-06-12 22:28:30 -04:00 |
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Thomas Harte
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aed2827e7b
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Implemented a rudimentary way to test that instructions take as long as the FUSE tests think they should. Hence discovered that the (HL)-accessing BIT, RES and SET weren't. Corrected.
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2017-06-12 22:22:00 -04:00 |
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Thomas Harte
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e6e6e4e62b
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Adds an extra character for padding the ZX81 table.
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2017-06-12 22:08:11 -04:00 |
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Thomas Harte
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8b09b4180b
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This now at least remembers whether it is meant to be a ZX81 and has storage for a horizontal counter.
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2017-06-12 21:33:16 -04:00 |
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Thomas Harte
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626737b9fa
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Started mucking about with some string conversion routines. Not finished yet.
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2017-06-12 21:32:36 -04:00 |
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Thomas Harte
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22de481557
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Made an attempt to get .p/.80 checked and as far as the emulated machine.
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2017-06-12 19:41:59 -04:00 |
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Thomas Harte
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b9dbb6bcf8
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Discovered my timing error: the I/R <-> A loads should take an extra cycle. This means the ZX80 now finally takes the correct 207 cycles per line. Fixed the video output wave to be clocked at the appropriate rate.
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2017-06-12 18:55:04 -04:00 |
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Thomas Harte
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a48616a138
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Fixed reference to Swift-world MachineDocument for the ZX81 file type.
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2017-06-12 18:51:11 -04:00 |
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Thomas Harte
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8222aac9e3
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Added an official declaration of support for ZX81 files.
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2017-06-11 21:40:41 -04:00 |
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Thomas Harte
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77aa3c187e
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Rebranded ZX80O as ZX80O81P, with an eye to making it accept ZX81 .p files. Adjusted the initial selection part of the static analyser appropriately.
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2017-06-11 21:38:32 -04:00 |
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Thomas Harte
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ee0283c985
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Modified to use an in-memory buffer for file contents.
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2017-06-11 21:35:09 -04:00 |
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Thomas Harte
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302c2e94de
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Corrected lingering hard-coded mask. So titles for memory configurations above 1kb now load.
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2017-06-11 21:27:46 -04:00 |
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Thomas Harte
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06fe07932a
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While tidying up, killed an unused instance variable.
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2017-06-11 21:21:26 -04:00 |
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Thomas Harte
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6913c7a018
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This also can just use rom_mask_.
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2017-06-11 19:29:20 -04:00 |
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Thomas Harte
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6b602c74b7
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Made an attempt to support memory maps other than the unexpanded default of 1kb.
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2017-06-11 19:29:02 -04:00 |
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Thomas Harte
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8116f85479
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Allowed the static analyser to specify a ZX80 or 81, and a memory model. Neither is respected yet in the machine.
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2017-06-11 19:12:20 -04:00 |
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Thomas Harte
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e40d553045
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Bumped the tape parser up into the machine to ensure a maintained state. Temporarily disabled normally-timed tape playback.
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2017-06-11 18:31:43 -04:00 |
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Thomas Harte
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2c6414ce11
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Adjusted to allow inspect_waves to swallow a gap before a bit if necessary, increasing the opportunities for its call.
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2017-06-11 18:31:09 -04:00 |
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Thomas Harte
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e5aea632ee
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Updated curly bracket placement.
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2017-06-11 17:29:22 -04:00 |
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Thomas Harte
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e5b30cdfbb
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Attempted to ensure appropriate resumption of processing after quick-reading a tape byte.
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2017-06-11 17:28:47 -04:00 |
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Thomas Harte
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ba5f34f827
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Narrowed view to the centre 80% of a frame.
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2017-06-11 17:24:32 -04:00 |
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Thomas Harte
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84d2feb2e6
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Cleaned up and implemented fast-tape hack. I've decided it'd be better to test some other software, potentially to give multiple issues to think about, rather than sitting around with just the one.
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2017-06-11 16:42:49 -04:00 |
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Thomas Harte
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d12e50eb02
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Corrected "should I adjust history?" tests.
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2017-06-11 16:41:34 -04:00 |
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Thomas Harte
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c2bc9a8c62
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Ensured no namespace collision in double-include guards.
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2017-06-11 16:41:15 -04:00 |
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Thomas Harte
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d910a4fd38
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Adjusted to signal an interrupt during the refresh cycle rather than weirdly just afterwards. Which cuts video timing down by 4 cycles a line. There still might be a problem here somewhere though, as I'm getting 206 cycles/line and the internet states it should be 207.
Also: lots of printfs have grown temporarily as I try to figure out what I'm doing so wrong as to break loading.
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2017-06-11 13:32:20 -04:00 |
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Thomas Harte
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db30f53ab0
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Added the capacity to back-date interrupt line changes within a machine cycle, so that machines which time themselves entirely within perform_machine_cycle can still be cycle accurate on those changes.
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2017-06-11 13:31:02 -04:00 |
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Thomas Harte
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50be3a24fe
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Sought to ensure that Mode 1 interrupts aren't happening early. Which they seem not to be.
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2017-06-11 13:30:08 -04:00 |
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Thomas Harte
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256ba4028b
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Rejigged to eliminate semi-duplication of the is-a-file test.
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2017-06-08 21:52:13 -04:00 |
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Thomas Harte
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b07af2660d
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Adjusted to make sure that the very end of a tape is properly measured.
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2017-06-08 21:33:35 -04:00 |
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Thomas Harte
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bc0d70b2f7
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Added: a shout-out when the tape has been exhausted.
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2017-06-08 21:32:27 -04:00 |
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Thomas Harte
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c6e48dfd56
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Given that a final gap is semantically part of describing tape contents, ensured one formally appears before declaring that the tape has ended.
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2017-06-08 21:31:54 -04:00 |
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Thomas Harte
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c775db50ef
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Ensured no out-of-bounds accesses.
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2017-06-08 21:31:03 -04:00 |
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Thomas Harte
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ee4c8b5ad2
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Ensured final byte plays out.
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2017-06-08 19:51:49 -04:00 |
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Thomas Harte
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d8b76e31c3
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Added and improved the is-this-ZX80-stuff test. It seems some bytes are going missing in the to->from tape conversion.
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2017-06-08 19:49:18 -04:00 |
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Thomas Harte
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7e10c7f9d8
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Relocated the ZX80/81 concept of a 'file' out from Tape into Data, given that it's an exact duplicate of memory.
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2017-06-08 19:09:51 -04:00 |
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Thomas Harte
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c47128f433
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Widened tolerances and ensured zero bits aren't prematurely discarded.
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2017-06-07 17:50:03 -04:00 |
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Thomas Harte
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8aab9acc10
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Eliminated use of the zero level; now definitively returns a low/high input.
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2017-06-07 17:39:29 -04:00 |
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Thomas Harte
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350b36df25
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Wired in an attempted usage of the new tape parser.
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2017-06-07 17:30:53 -04:00 |
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Thomas Harte
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dbd2944c13
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Took an initial run at the ZX80/81 parser.
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2017-06-07 17:27:05 -04:00 |
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Thomas Harte
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4603fa6f24
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Extended explicitly to support a token of lookahead, which is pretty much what was on offer anyway. Also corrected instance variable names, as per better adoption of C++ norms.
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2017-06-07 17:21:57 -04:00 |
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Thomas Harte
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60300851ea
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Started sketching out a tape parser for ZX80 and '81 files. I think this'll help me to verify whether the .O input is working.
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2017-06-07 10:12:13 -04:00 |
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Thomas Harte
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58312ea2b7
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Updated to new standardisation on curly bracket placement.
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2017-06-07 10:05:43 -04:00 |
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Thomas Harte
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cb534d8b85
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Corrected comment.
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2017-06-07 10:05:16 -04:00 |
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Thomas Harte
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5626d35bc4
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Tried flipping the bit meaning; decided at least to leave it in full-byte form.
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2017-06-06 18:38:05 -04:00 |
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Thomas Harte
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4677cebf40
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Rejigged to correct: spaces go after bits, not after bytes.
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2017-06-06 18:29:15 -04:00 |
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Thomas Harte
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7399f3d798
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Caveman debugging in place, it looks like this file is returning nonsense.
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2017-06-06 18:18:55 -04:00 |
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