3120 Commits

This Branch

This Branch

All Branches

Author	SHA1	Message	Date
Thomas Harte	039aed1bd1	Switches the two sync counters to upward-going rather than downward, as a more likely match to the way the rest of the 6845 implementation.	2017-08-25 21:26:01 -04:00
Thomas Harte	d77d7fdd78	Merge pull request #220 from TomHarte/Analysis ... Resolves all current analyser warnings.	2017-08-24 22:19:51 -04:00
Thomas Harte	c6e6c3fcfb	Resolves all current analyser warnings.	2017-08-24 22:18:44 -04:00
Thomas Harte	ecd3350a6f	Merge pull request #219 from TomHarte/ConstSafety ... Makes all of PartialMachineCycle const	2017-08-24 22:04:06 -04:00
Thomas Harte	fa19e2d9c2	Removes some detritus.	2017-08-24 22:00:21 -04:00
Thomas Harte	95d360251d	Makes all of PartialMachineCycle const, with the exception of the target of *value, since that's intended to be writeable by recipients.	2017-08-24 21:32:33 -04:00
Thomas Harte	7af3de010e	Suspected my mode 1 interrupt timing might be off. Reminded myself of the sources. Persuaded myself that it wasn't. Added appropriate comments.	2017-08-23 22:25:31 -04:00
Thomas Harte	cefd421992	Merge pull request #218 from TomHarte/6845Factored ... Refactors the 6845 to make end-of-line and end-of-frame conditions more explicit and to reduce repetition	2017-08-22 22:21:17 -04:00
Thomas Harte	a914eadc85	Ensured that register 6 is checked on every loop.	2017-08-22 22:17:45 -04:00
Thomas Harte	131b340d75	Dodges a lambda copy.	2017-08-22 21:55:10 -04:00
Thomas Harte	e956740c56	Refactors the 6845 more clearly to break out the acts of ending a line and ending a frame, changing the way the memory address is altered — the end-of-line value is provisionally stored and then used if necessary — in order to do so.	2017-08-22 21:54:48 -04:00
Thomas Harte	8afd83b91f	Merge pull request #217 from TomHarte/CompiletimeOptions ... Introduces compile-time selection of minor CPU core features and applies forceinline when appropriate	2017-08-21 22:29:24 -04:00
Thomas Harte	40d7a603db	Ensured that forceinline does nothing in debug builds.	2017-08-21 22:04:15 -04:00
Thomas Harte	ee71be0e7e	Added the option not to include ready line support in the 6502 core, and took advantage of it in the Electron, Oric and Vic-20 implementations. Also tagged those as forceinline and/or override final where applicable.	2017-08-21 21:56:42 -04:00
Thomas Harte	cde29c4bf4	Added forceinlines and properly declared finals and overrides.	2017-08-21 21:07:10 -04:00
Thomas Harte	e1aded0d95	Allows Z80 users to opt out of support for the bus request line. Which both now do.	2017-08-21 20:43:12 -04:00
Thomas Harte	1237f174fe	Merge pull request #216 from TomHarte/NoiseReduciton ... Cleans up issues affecting the sleeper mechanism and the CPC	2017-08-20 13:26:56 -04:00
Thomas Harte	0cbc1753b9	Quick fixes: the binary tape player now considers talk to the sleep observer only if motor control changes. The Amstrad CPC no longer attempts to use the component argument to identify the caller, since this will often be that of the superclass and not that of the derived class known to the CPC.	2017-08-20 13:18:46 -04:00
Thomas Harte	5cf0395936	Merge pull request #215 from TomHarte/Z80BusReq ... Removes repeated checking of bus_request_line_ by the Z80.	2017-08-20 12:40:37 -04:00
Thomas Harte	6315c22b80	Removed repeated checking of bus_request_line_. It's now checked only after each outward perform_machine_cycle.	2017-08-20 12:39:45 -04:00
Thomas Harte	4614a56843	Merge pull request #214 from TomHarte/Sleeper ... Experimentally introduces the concept of a 'sleeper' — a component that will volunteer to be unclocked for a period	2017-08-20 12:29:32 -04:00
Thomas Harte	8f5ae4a326	The CPC now responds to tape-originating sleeper observations.	2017-08-20 12:21:02 -04:00
Thomas Harte	8fdc5012e4	Updated TapePlayer and BinaryTapePlayer to be sleepers.	2017-08-20 12:18:36 -04:00
Thomas Harte	e88a51e75e	Worked logic all the way down to the CPC. If the 8272 announces that it is asleep, it is now no longer clocked. Also very slightly cut down on IRQ line chatter to the Z80.	2017-08-20 12:05:00 -04:00
Thomas Harte	49285e9caa	Attempted to implement Sleeper in Drive and therefore in DiskController. Also corrected a couple of nonconformant file names.	2017-08-20 11:54:54 -04:00
Thomas Harte	e3f2118757	Merge branch 'master' into Sleeper	2017-08-20 10:58:03 -04:00
Thomas Harte	daeaa4752f	Merge pull request #213 from TomHarte/MinorPalette ... Makes a variety of minor performance improvements to the CPC	2017-08-20 10:57:41 -04:00
Thomas Harte	5344e3098b	Minor: made has_disk something that is decided on insertion/deletion.	2017-08-20 10:55:08 -04:00
Thomas Harte	cedb809c21	Sketched out a protocol designed to save processing time on anything that may sleep — probably just disk controllers for now but one can easily imagine it being applicable to printers, and possibly sound chips with suitable changes in guarantee for sound packet receivers.	2017-08-20 10:53:25 -04:00
Thomas Harte	2d9efccc98	Introduced a master 'is sleeping' flag. I'm starting to think there's a pattern forming here.	2017-08-20 10:43:53 -04:00
Thomas Harte	8ce46b6e49	Having spotted that I was using my single-character loop counter names incorrectly (quelle surprise!), got a bit more explicit. Also flattened into a single loop so that I can break rather than returning.	2017-08-20 10:32:09 -04:00
Thomas Harte	f2699a3f2b	Okay, even if releasing it is unsafe, I can at least move the typer so that it is no longer called.	2017-08-20 10:24:01 -04:00
Thomas Harte	85253a5876	Sought further to reduce the processing footprint of palette changes by updating only those table entries that are affected by a change.	2017-08-20 10:13:23 -04:00
Thomas Harte	911ee5a0d3	At least added a fast return.	2017-08-19 22:22:51 -04:00
Thomas Harte	57c5b38a6d	Step one towards cutting much of this cost: build only the table that's appropriate for the current mode, and at least declare when a more minimal change would be sufficient.	2017-08-19 22:19:46 -04:00
Thomas Harte	669e0caff5	Ensured the head_unload_delay values are properly seeded, and generalised the quick escape.	2017-08-19 22:06:56 -04:00
Thomas Harte	b24d04fc09	Merge pull request #212 from TomHarte/MFMParserDensity ... Improves the variability of the MFM parser used for static analysis	2017-08-18 15:57:37 -04:00
Thomas Harte	ef07c33741	Merge branch 'Plus10' into MFMParserDensity	2017-08-18 15:48:20 -04:00
Thomas Harte	e559a65ede	Ideally I would be able to kill this multiplier, as it could easily be derived at runtime. But, for now, just turned it up so that the analysis-oriented parser is better at parsing different bit rates.	2017-08-18 15:47:46 -04:00
Thomas Harte	5bdd24d93f	Merge pull request #211 from TomHarte/HFE ... Introduces support for the HFE file format.	2017-08-17 22:43:23 -04:00
Thomas Harte	af61a7fa28	Two quick fixes: correctly set segment size, and flip bytes to match HFE's bit ordering to PCMTrack's.	2017-08-17 22:28:00 -04:00
Thomas Harte	c8c1792c3f	Made a first attempt at HFE support.	2017-08-17 22:20:02 -04:00
Thomas Harte	e6683e7f2d	Added the base skeletal stuff of HFE support.	2017-08-17 21:48:48 -04:00
Thomas Harte	0c1714b695	Relaxed a little to allow +10% in track length.	2017-08-17 21:36:14 -04:00
Thomas Harte	dc0ca83003	Merge pull request #210 from TomHarte/TrackSize ... Various MFM and DSK fixes	2017-08-17 15:50:27 -04:00
Thomas Harte	2c2dd8073c	Modified to return nullptr if asked for an extended disk image track that doesn't exist.	2017-08-17 15:32:24 -04:00
Thomas Harte	4f8b89772e	Improved logic for detecting when all sense has been derived from a track to spot any repeated track, not necessarily the first one. That avoids sectors that run over the index hold and obscure the first throwing things.	2017-08-17 15:31:53 -04:00
Thomas Harte	733ee5a5c3	Ensured no attempt to put a null track into the cache	2017-08-17 15:30:02 -04:00
Thomas Harte	fedf5a44a6	Imposes a maximum track length.	2017-08-17 15:20:49 -04:00
Thomas Harte	6a09022896	Merge pull request #209 from TomHarte/BootOnly ... Generalises: an acceptable boot sector is always acceptable	2017-08-17 14:29:37 -04:00