91 Commits

Author	SHA1	Message	Date
Thomas Harte	beaa868079	Factored the MFM parser out into encodings.	2016-12-25 20:00:57 -05:00
Thomas Harte	4d3bdf8c7c	Fixed failure to initialise the Microdisc flag if loading a tape.	2016-12-06 20:29:05 -05:00
Thomas Harte	59e2a09107	Added assumption that Microdisc => BASIC 1.1.	2016-11-22 08:12:24 +08:00
Thomas Harte	ea33a28695	Any Oric-format disks that are inserted now make it all the way to the Oric, along with a request to emulate the Microdisc. It has received a copy of the ROM. The ball is entirely in its court now.	2016-11-21 20:59:25 +08:00
Thomas Harte	8499783b14	Dragged multibyte primitives and signature checks up to the base class. Implemented support for Oric MFM-style .DSK, at the file format level.	2016-11-21 20:47:16 +08:00
Thomas Harte	8b40ae03ca	Extended analysis to spot IRQ and NMI vector changes, for titles that simply adjust those then exit. Ensured Oric emulator can type and load quickly on an Oric 1 just as well as on an Atmos.	2016-11-15 11:05:53 +08:00
Thomas Harte	e2cdfae8a7	The emulated Oric now has access to both versions of the BASIC ROM and picks between them based on the static analyser's recommendation.	2016-11-15 10:39:16 +08:00
Thomas Harte	ab64731d51	Fixed off-by-one recording of disasssmbled addresses; added logic to the Oric static analyser to try to guess between BASIC 1.1 (the preferred option in a tie-break or if no information is found) and BASIC 1.0.	2016-11-15 10:31:47 +08:00
Thomas Harte	1bffc70494	In theory that's a full disassembler, at least as far as I want to go for now. Time to test.	2016-11-15 08:19:57 +08:00
Thomas Harte	a5fc45e66e	Started fleshing this out; addressing modes are completely decoded, along with a bunch of opcodes, but appropriate address advancement isn't in yet, and neither is filling in derived metadata.	2016-11-14 12:19:09 +08:00
Thomas Harte	1b66847647	Started trying to implement something sufficient of a 6502 disassembler.	2016-11-11 20:10:58 -05:00
Thomas Harte	c257e7f58d	Implemented better sync-to-zero and discovered a header counting bug plus, probably, a misleading representation of gaps in the Oric TAP decoder.	2016-11-07 20:17:06 -05:00
Thomas Harte	80702616ea	Had a quick go at using the Oric parser for static analysis. Found out that synchronisation is lost. Need to investigate.	2016-11-06 22:56:38 -05:00
Thomas Harte	353c1c8ea3	Shifted ownership of PETSCII -> string conversion down to the storage layer, where it's useful for tape parsing.	2016-11-06 18:43:51 -05:00
Thomas Harte	1b15bc3a6c	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).	2016-11-06 16:13:13 -05:00
Thomas Harte	093eb55fc6	The parsers no longer own a tape, merely taking one as an argument. So they can be an adjunct.	2016-11-06 15:25:18 -05:00
Thomas Harte	8c70dc5891	Implemented typer for the Oric, and I'm starting to think the code is a bit too repetitious. Refactoring will be forthcoming. Added CLOAD"" as the loading command for all Oric software.	2016-11-03 22:14:40 -04:00
Thomas Harte	4a062c616f	Added enough wiring to get Oric TAPs through to a completely unimplemented Oric emulation.	2016-10-11 22:20:13 -04:00
Thomas Harte	df01c78039	It's a bit of a mess but this is probably close to appropriate for Oric TAP files.	2016-10-11 07:39:48 -04:00
Thomas Harte	2411f192f7	Switched back to full typing, even for DFS loading. It saves having to worry about sideways RAM filing systems and shift (if that's even the issue).	2016-10-01 21:09:28 -04:00
Thomas Harte	abf47efd40	Factored out Commodore is-a-ROM test, allowing it to be used from the Commodore analyser and thereby allowing ROMs to get as far as the machine again.	2016-09-29 19:39:13 -04:00
Thomas Harte	79412dc84d	Upped MFM clock cycles, switched back to using the typer for the ADFS and adjusted ADFS ROM slots.	2016-09-28 21:28:34 -04:00
Thomas Harte	572d5587d9	Made a first stab at enabling multi-disk machines and thereby obeying (some of) the Plus 3's status register.	2016-09-25 21:24:16 -04:00
Thomas Harte	9bbcbd1001	Renamed class, intending to turn a Disk::Drive into literally just that, and have a thing with a PLL that consumes events be a Controller.	2016-09-25 20:05:56 -04:00
Thomas Harte	7f4c78139c	Attempted to ensure that ADFS disks get to an appropriately-configured Electron. Not immediately sure why the shift press isn't working; doesn't need to be dealt with immediately.	2016-09-25 19:59:46 -04:00
Thomas Harte	523dbb9678	This'll do for getting the ADF into the machine.	2016-09-25 18:32:26 -04:00
Thomas Harte	de863719d0	Made a first attempt at Acorn ADFS support plus the start of a suitable analyser.	2016-09-25 17:46:11 -04:00
Thomas Harte	6084020ab3	Added shift-break as a better way to boot suitable disks. Continued attempting to clean the 1770.	2016-09-25 14:11:22 -04:00
Thomas Harte	67b54269c9	Added typer support for loading from DFS. It'll do for now.	2016-09-24 22:52:49 -04:00
Thomas Harte	a9e65e9b7a	Tweaked disk side density, added call-outs to a WD1770 if the Electron had one (albeit without run_for_cycles yet as I need to figure out the clock rate), added a shell of the basic functions of the WD1770. No implementation yet.	2016-09-19 22:06:56 -04:00
Thomas Harte	c9dd07cecd	DFS disks are now delivered right up to the emulator's front door. So everything's in place to get started on that WD1770 nonsense.	2016-09-19 08:29:23 -04:00
Thomas Harte	e025768604	Two passes of the index hole => no sector found.	2016-09-19 08:17:07 -04:00
Thomas Harte	64f2538b1f	Added CRC checking to DFS comprehension; fixed a bunch of places where I'd used Objective-C's #import rather than #include.	2016-09-19 08:16:06 -04:00
Thomas Harte	c58cdbf151	Minor tweak to support zero-length files.	2016-09-19 07:37:11 -04:00
Thomas Harte	ca4df5dd61	Introduced a full container for disk catalogues, so as also to capture non-file information, and 'completed' (i.e. albeit that CRC checking is still absent) DFS catalogue decoding.	2016-09-19 07:35:02 -04:00
Thomas Harte	231f3dd0f4	This is exactly as far as I'm going to get with DFS parsing today, I think.	2016-09-18 22:18:01 -04:00
Thomas Harte	b1e7f2dfd0	There's no cache and no CRC checking yet, but this is probably a rough outline of an FM parser.	2016-09-18 22:03:06 -04:00
Thomas Harte	0ce901bd48	Added necessary wiring to get as far as asking an arm of the analyser to check out an Acorn disk image.	2016-09-18 21:18:11 -04:00
Thomas Harte	91cd7e143b	Started on the SSD/DSD support. Realised I had ommitted multiple head support from my disk class. Fixed that.	2016-09-18 19:21:02 -04:00
Thomas Harte	5ebca62bba	Now the CRC is a factoring out.	2016-09-18 18:35:50 -04:00
Thomas Harte	bfed9585b8	Added a sector cache to avoid having to re-decode things five times over.	2016-09-17 22:01:54 -04:00
Thomas Harte	ee8510984f	Added just enough wiring to restore the 2600 to functionality.	2016-09-15 19:34:45 -04:00
Thomas Harte	92af19098c	Improved file naming.	2016-09-15 19:24:59 -04:00
Thomas Harte	1d8fbe9068	With minor cleaning, this should now do Commodore disks correctly (?)	2016-09-15 19:21:09 -04:00
Thomas Harte	9827466297	Minor post-haste cleaning.	2016-09-15 07:58:32 -04:00
Thomas Harte	8992feb8cd	Completed a first parse at the GCR parser, proving how incredibly slow my drive is.	2016-09-15 07:54:42 -04:00
Thomas Harte	9d6dcb80a7	Started work on a GCR parser and the helper functions that lie behind that.	2016-09-13 21:53:36 -04:00
Thomas Harte	df7aed7e8b	The Commodore analyser now at least hands off to somebody else a chance to parse disks.	2016-09-13 07:26:51 -04:00
Thomas Harte	40660fe680	Made yet another guess at Commodore analysis. Elevated fast tape-related unnatural speed up to the OS-side mechanisms.	2016-09-12 22:06:03 -04:00
Thomas Harte	eeec516fa6	Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator.	2016-09-11 17:09:00 -04:00