Thomas Harte
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3f7f2c6117
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'Tape' has joined the new underscore orthodoxy.
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2016-12-03 12:05:19 -05:00 |
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Thomas Harte
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8499783b14
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Dragged multibyte primitives and signature checks up to the base class. Implemented support for Oric MFM-style .DSK, at the file format level.
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2016-11-21 20:47:16 +08:00 |
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Thomas Harte
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31c2548804
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Created a base class for the boilerplate fopen stuff, switched as many classes as possible to its use, switched to postfix underscores and non-camelCase names.
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2016-11-21 20:14:09 +08:00 |
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Thomas Harte
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97811fe590
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Made minor fix to ensure that a header that appears to extend beyond the end of an Oric .TAP doesn't create an ostensibly endless tape.
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2016-11-15 12:02:03 +08:00 |
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Thomas Harte
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fce48b9b8c
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I am instructed that the Oric actually catches only positive transitions, and compares the distance between those to a threshold. So here's an altered version of the tape parser that does that.
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2016-11-09 06:37:10 -05:00 |
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Thomas Harte
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c257e7f58d
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Implemented better sync-to-zero and discovered a header counting bug plus, probably, a misleading representation of gaps in the Oric TAP decoder.
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2016-11-07 20:17:06 -05:00 |
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Thomas Harte
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80702616ea
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Had a quick go at using the Oric parser for static analysis. Found out that synchronisation is lost. Need to investigate.
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2016-11-06 22:56:38 -05:00 |
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Thomas Harte
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7205c3f82b
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Made an attempt to build in Oric slow/fast detection.
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2016-11-06 21:31:10 -05:00 |
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Thomas Harte
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d1ef2f7c63
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Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation.
(while adding support for the slow tape encoding mode)
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2016-11-06 19:22:09 -05:00 |
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Thomas Harte
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353c1c8ea3
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Shifted ownership of PETSCII -> string conversion down to the storage layer, where it's useful for tape parsing.
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2016-11-06 18:43:51 -05:00 |
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Thomas Harte
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1b15bc3a6c
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Started relocating the tape parsers down from static analyser to storage, to signify that they may be used by the emulation (if fast loading is supported on that machine).
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2016-11-06 16:13:13 -05:00 |
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Thomas Harte
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827a919368
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This is an initial attempt at reading actual tape data. It loses sync though.
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2016-11-02 22:30:53 -04:00 |
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Thomas Harte
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d3634488e6
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Made an attempt better to deal with multiple-file TAPs; also started using a zero level for the header/data gap.
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2016-10-24 21:59:06 -04:00 |
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Thomas Harte
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cbbd31c2e0
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Explained what this recently factored-out class does, and removed code from the header.
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2016-10-20 19:33:25 -04:00 |
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Thomas Harte
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cc0b70828b
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Removed attempt at multiple-file logic, at least for the time being. Starting to wonder whether I actually need anything beyond a literal streaming of bytes?
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2016-10-16 22:15:24 -04:00 |
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Thomas Harte
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fae1bb0db9
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First successful game loaded! It turns out exactly one '$' is correct. Probably.
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2016-10-15 21:49:41 -04:00 |
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Thomas Harte
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952a24f769
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A quick hard-wiring of the OricTAP code to get the first file in a .tap correct, damn the rest, and I'm getting some on-screen feedback. Hooray!
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2016-10-15 21:39:53 -04:00 |
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Thomas Harte
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a608bbebfb
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Performed enough wiring to put the onus back onto OricTAP to do appropriate things.
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2016-10-15 21:32:59 -04:00 |
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Thomas Harte
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6d7c3f6ac2
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Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric.
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2016-10-15 21:21:18 -04:00 |
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Thomas Harte
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4f78d693e9
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Reintroduced gap as a string of 1s, made an attempt to look up bit ordering. Still unclear on high/low versus low/high.
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2016-10-11 08:07:51 -04:00 |
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Thomas Harte
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70f004efbb
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This may be feeding bits in the wrong direction or calculting the wrong parity or doing something else amiss but should now be correct as to bytes.
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2016-10-11 07:57:10 -04:00 |
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Thomas Harte
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df01c78039
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It's a bit of a mess but this is probably close to appropriate for Oric TAP files.
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2016-10-11 07:39:48 -04:00 |
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Thomas Harte
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4010f36238
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Ensured tape-formatted PRGs reach a conclusion.
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2016-09-29 19:12:26 -04:00 |
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Thomas Harte
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dbb758aaf1
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Workaround for a weird bug that suddenly appears to manifest: gzgetc is returning the file name, not bytes from the file. Seems to be related to improper initialisation of the next field within the gzFile header. I can't immediately see where ZLib intends to do that so it's a bit mysterious. But the larger-than-8 readers could probably save time by reading in blocks anyway.
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2016-09-17 22:01:25 -04:00 |
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Thomas Harte
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e3571e8b9e
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Added insurance against an infinite loop should the tape be exhausted.
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2016-09-12 22:22:23 -04:00 |
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Thomas Harte
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eeec516fa6
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Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator.
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2016-09-11 17:09:00 -04:00 |
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Thomas Harte
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1de6097f06
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Shuffled C stuff out on top.
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2016-09-08 21:08:03 -04:00 |
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Thomas Harte
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24251a2768
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Negligible indentation fix.
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2016-09-08 07:49:43 -04:00 |
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Thomas Harte
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01e5dae512
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Threw in 300-baud support. Why not?
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2016-09-08 07:48:20 -04:00 |
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Thomas Harte
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3e925e80a3
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Added a field-filling constructor for pulses.
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2016-09-08 07:41:44 -04:00 |
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Thomas Harte
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1e7b5330f5
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More or less rewrote, to use a filled-per-chunk buffer of upcoming pulses rather than working them out as requests come. Which is more straightforward — all the code for a particular chunk goes in exactly one place — and much easier to extend. So threw in a provisional 0104 implementation.
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2016-09-08 07:41:26 -04:00 |
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Thomas Harte
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d7d5f24aab
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Attempted, at least, to insert a dummy byte as per the specification.
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2016-09-06 21:51:04 -04:00 |
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Thomas Harte
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11850b872d
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Sought to emulate 0111 as a longer 0110 to test a particular HQ UEF. Some progress. Not great.
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2016-09-05 18:28:43 -04:00 |
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Thomas Harte
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21e5f407d8
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I need to get a bit more definitive on naming but this gets all the way to setting a configuration upon an Electron.
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2016-08-31 22:03:42 -04:00 |
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Thomas Harte
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963a479908
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Made a quick first attempt at getting a file name from Acorn tape, failing terribly but at least formalising tapes being able to signal their end.
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2016-08-29 21:53:06 -04:00 |
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Thomas Harte
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82c8459055
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Minor tidying of namespace usage declarations.
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2016-08-27 17:18:12 -04:00 |
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Thomas Harte
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c0402d0c2b
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Gave tapes their own namespace.
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2016-08-27 17:09:45 -04:00 |
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Thomas Harte
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8c333059a8
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Turning this into a slog: gave UEF a more appropriate name, got as far as now having to decide what to do about ROMs as to structure. I guess they're machine specific, so specific classes?
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2016-08-27 16:40:21 -04:00 |
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Thomas Harte
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73ce67bee8
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Added some documentation of the intention here.
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2016-08-19 11:04:59 -04:00 |
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Thomas Harte
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4edd1214f1
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This has now successfully loaded its first PRG-as-a-tape.
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2016-08-19 10:58:42 -04:00 |
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Thomas Harte
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2935848f35
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Adopted header/header/data/data pattern. But still not complete joy.
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2016-08-17 08:03:34 -04:00 |
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Thomas Harte
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e5523dbbed
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This gets through loading the first(/only?) copy. I tried repeating it with a bit-flipped header, now I'm trying repeating the header with a different file type. More documentation searching to do, I guess.
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2016-08-16 22:17:08 -04:00 |
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Thomas Harte
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1bca9aa2bb
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Fixed parity: now calculated from the actual byte and works the other way around. The Vic now believes it is loading the actual program. So I guess bytes, headers and the lead-in is working.
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2016-08-16 21:41:09 -04:00 |
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Thomas Harte
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dfe9fb83ef
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This proves that bytes are being deposited properly. For the first 36 anyway, and with no announcement.
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2016-08-16 21:09:50 -04:00 |
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Thomas Harte
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12f8aff65b
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Lengths I'd taken seem to have been for dipoles, not single poles. So I just doubled the clock rate. Also I was producing each dipole as high then low, when they should probably be low then high. The Vic now at least recognises that something is happening on the tape.
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2016-08-16 19:46:53 -04:00 |
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Thomas Harte
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3a23d5d8cf
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Adjusted the check digit.
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2016-08-15 22:44:36 -04:00 |
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Thomas Harte
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dbe47f3f45
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I've obviously misunderstood something as, as far as I'm concerned, this should at least get me a 'LOADING'.
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2016-08-15 22:40:05 -04:00 |
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Thomas Harte
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7994148f55
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I'm starting to make a little headway, I think: this performs lead-ins and countdowns, though with no actual data or anything as helpful as that.
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2016-08-15 22:10:53 -04:00 |
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Thomas Harte
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7e2b4554ea
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This likely forms the Commodore dipoles correctly. It just stays stuck in leader tone forever is all.
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2016-08-15 20:08:50 -04:00 |
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Thomas Harte
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38aec44d85
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Made sufficient changes for the Vic itself to believe it can recast a PRG as a tape and insert it that way. So now the ball is in the court of: how the heck are Commodore tapes encoded?
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2016-08-15 19:44:41 -04:00 |
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