673 Commits

Author	SHA1	Message	Date
Thomas Harte	ccd2cb44a2	Fills in enough of the SCC to allow completion of the Macintosh side of that relationship.	2019-06-12 17:51:50 -04:00
Thomas Harte	ad8b68c998	Switches to a proper form of zero-upon-read data. ... Not that it's necessarily correct.	2019-06-11 19:53:51 -04:00
Thomas Harte	3c075e9542	Switches drives 0 and 1.	2019-06-10 14:58:39 -04:00
Thomas Harte	9230969f43	Corrects enough of the 6522 and Keyboard to get an initial command seemingly working.	2019-06-10 09:28:27 -04:00
Thomas Harte	0e16c67805	Improves shift register connection, towards having the keyboard function properly. ... It now seems not to receive a command terminator, but is at least getting a command.	2019-06-08 23:04:55 -04:00
Thomas Harte	697e094a4e	Sketches out the absolute basics of an SCC interface.	2019-06-08 18:47:11 -04:00
Thomas Harte	50d37798a2	Eradicates magic constants.	2019-06-06 21:37:43 -04:00
Thomas Harte	e9d0676e75	Fiddles further with the tachometer.	2019-06-06 21:36:19 -04:00
Thomas Harte	7591906777	Numerous IWM fixes: the machine now seems to be trying to measure the tachometer.	2019-06-06 18:32:11 -04:00
Thomas Harte	a413ae11cb	Makes some sort of first attempt at having the IWM read.	2019-06-04 22:13:00 -04:00
Thomas Harte	b8a1553368	Adds putative support for PlusToo-style BIN files. ... Albeit a bit of a guess, since it's not intended to be an emulator file format.	2019-06-04 21:41:09 -04:00
Thomas Harte	8557558bd8	Mildly improves investigatory reporting.	2019-06-03 21:51:45 -04:00
Thomas Harte	abe55fe950	Adds Timer 1 toggling of PB7.	2019-06-03 15:39:20 -04:00
Thomas Harte	da2b190288	Stores expected bit length.	2019-06-01 19:08:29 -04:00
Thomas Harte	48d837c636	Attempts to respond more sensibly to various queries. ... Including adding a 1-second delay on motor off.	2019-06-01 18:43:47 -04:00
Thomas Harte	723137c0d4	With some time additions to the 6522, starts wiring in Macintosh audio. ... The audio buffer is also the disk motor buffer, so this is preparatory to further disk work.	2019-06-01 14:39:40 -04:00
Thomas Harte	4197c6f149	Attempts to make some further semantic sense of the various IWM controls.	2019-05-30 22:17:49 -04:00
Thomas Harte	4632be4fe5	Wires up the final IWM signal, SEL, preparatory to an implementation.	2019-05-30 12:08:00 -04:00
Thomas Harte	8293b18278	Adds a TODO on what I think might be an incorrect implementation?	2019-05-08 15:06:40 -04:00
Thomas Harte	2ba0364850	Adds the shift register interrupt.	2019-05-08 15:02:07 -04:00
Thomas Harte	2e7bc0b98a	Attempts the shift register.	2019-05-08 14:54:40 -04:00
Thomas Harte	8278809383	Attempts to get more rigorous on communicating outward control line changes.	2019-05-08 13:33:22 -04:00
Thomas Harte	4367459cf2	Takes a first go at handshake and pulse modes.	2019-05-08 12:48:29 -04:00
Thomas Harte	254132b83d	Eliminates 6522Base in pursuit of working handshake modes. ... Specifically: this means that the places from which the BusHandler may be called are more numerous.	2019-05-08 12:35:17 -04:00
Thomas Harte	7e6d4f5a3e	Adds emulation of the real-time clock.	2019-05-08 00:12:19 -04:00
Thomas Harte	ce099a297a	Eliminates RAM writes in ROM area. ... I no longer think that logic is correct.	2019-05-07 17:16:22 -04:00
Thomas Harte	96facc103a	Adds an IWM shim and corrects graphics output. ... ... now that there is some.	2019-05-05 21:55:34 -04:00
Thomas Harte	62a1d69cee	Implements proper AY IO output behaviour.	2019-03-05 20:20:26 -05:00
Thomas Harte	d97348dd38	Eliminates dangling uses of printf.	2019-03-02 18:07:05 -05:00
Thomas Harte	7030abca97	Corrects PAL colours for the Vic-20.	2019-02-25 19:28:52 -05:00
Thomas Harte	e5addb27ec	Corrects log output.	2019-02-18 20:49:01 -05:00
Thomas Harte	2ef6d4327c	Resolves further build warnings.	2019-01-13 20:37:50 -05:00
Thomas Harte	248a8efd2f	Corrects declared pixel clock GCD.	2019-01-06 16:32:13 -05:00
Thomas Harte	601961deeb	Wires through set_display_type.	2018-11-29 20:44:21 -08:00
Thomas Harte	64465f97b6	Starts towards reintroducing the proper mechanisms for selecting a display type at runtime.	2018-11-28 17:53:33 -08:00
Thomas Harte	5618288459	Reduces visible area, producing a tighter crop.	2018-11-25 22:32:12 -05:00
Thomas Harte	ee89be6730	Removes many stray spaces.	2018-11-23 22:32:32 -05:00
Thomas Harte	770d7e90e9	Removes stale sampling functions.	2018-11-22 22:47:29 -05:00
Thomas Harte	b9aca39eb0	Reintroduces Vic-20 output. ... Resolving errors in shader generation while I'm here.	2018-11-22 22:43:42 -05:00
Thomas Harte	c5d9bf2c12	Optimises slightly for black borders. ... Specifically to help to debug proper display of unused lines in the new scan target.	2018-11-17 18:23:42 -05:00
Thomas Harte	15b1176841	Ensures no border output if space is not allocated.	2018-11-14 22:32:33 -05:00
Thomas Harte	9dff13cbbf	Re-establishes output from the machines with 9918s and derivatives.	2018-11-14 22:25:19 -05:00
Thomas Harte	6d277fecd5	Makes ScanTarget a little more communicative and orthogonal.	2018-11-10 19:52:57 -05:00
Thomas Harte	f6562de325	Possibly adds enough for the Electron and ZX80 to start outputting dummy lines. ... Let's see!	2018-11-03 23:40:39 -04:00
Thomas Harte	b40211d2c0	Starts to bend 'CRTMachine' to a world farther from owning the GPU relationship.	2018-11-03 21:54:25 -04:00
Thomas Harte	da4d883321	Adds first, incomplete attempts to talk to a ScanTarget from the CRT. ... Does away with the hassle of `unsigned` while I'm here; that was a schoolboy error.	2018-11-03 19:58:44 -04:00
Thomas Harte	f65d80b7d1	Ensures offset and flags are initialised to 0. ... This prevents a potential crash at startup.	2018-10-29 22:09:32 -04:00
Thomas Harte	8652d8b23d	(Mostly) randomises the 9918 start position.	2018-10-26 21:02:56 -04:00
Thomas Harte	e02aa885d8	Testing against the ColecoVision suggests this is probably always 7.	2018-10-26 20:59:12 -04:00
Thomas Harte	bb09762029	Introduces extra delays to VRAM access.	2018-10-26 20:19:08 -04:00