48 Commits

Author	SHA1	Message	Date
Thomas Harte	a47de9a884	Returns the Apple II to submitting video.	2018-11-14 22:04:57 -05:00
Thomas Harte	6d277fecd5	Makes ScanTarget a little more communicative and orthogonal.	2018-11-10 19:52:57 -05:00
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	5445081c96	It's eight pixels that aren't written in double output mode, not four.	2018-09-10 21:38:05 -04:00
Thomas Harte	d70f5da94e	Attempts an implementation of the undocumented low res + annunciator 3 graphics mode.	2018-09-08 20:51:15 -04:00
Thomas Harte	afeec09902	Gets explicit about DHIRES being annunciator 3; implements four-colour high res mode.	2018-09-06 23:23:19 -04:00
Thomas Harte	0526ac2ee2	Slightly increases const correctness. ... The converters from source data to output pixels do not modify the source data. It's a shame there's no `restrict` in C++.	2018-09-05 11:36:40 -04:00
Thomas Harte	8b661fb90f	Introduces an extra level of indirection for text mapping.	2018-09-05 10:26:08 -04:00
Thomas Harte	234bef2a88	Adds default to make it explicit that fetch_address is initialised.	2018-08-24 22:26:03 -04:00
Thomas Harte	97a89aaf4d	Factors out the stuff of deferred action interleaving, as I suspect it'll come in handy.	2018-08-24 20:04:26 -04:00
Thomas Harte	61e46399dc	About face! There should be no delay on serialisation, but a delay on interpretation-affecting soft switches.	2018-08-22 21:56:45 -04:00
Thomas Harte	e802f6ecc2	Rearranges draw loop around a fixed-size 568-sample line buffer.	2018-08-19 22:31:04 -04:00
Thomas Harte	4209f0e044	Moves memory collection into a separate loop.	2018-08-18 21:54:24 -04:00
Thomas Harte	33576aa2c4	Uses const to ensure output_* are properly constrained.	2018-08-18 21:36:48 -04:00
Thomas Harte	17bf1a64bf	Moves the stuff of generating pixels out of the main loop.	2018-08-18 18:44:31 -04:00
Thomas Harte	4d1d19a464	Introduces an intermediate buffer for Apple II video data.	2018-08-12 20:36:08 -04:00
Thomas Harte	434d184503	Corrects deserialisation order in double low res mode.	2018-08-11 22:53:06 -04:00
Thomas Harte	60ab6f0c2a	Entrusts IIe-esque character logic fully to the ROM.	2018-08-11 18:45:39 -04:00
Thomas Harte	55f2fccf5e	Extends correct text handling to 80-column mode.	2018-08-04 22:25:29 -04:00
Thomas Harte	099d66804e	Makes colour burst phase explicit.	2018-08-04 19:29:34 -04:00
Thomas Harte	086596c28e	Adds reading of vertical blank and implements the full IIe keyboard logic. ... i.e. there are now two Apple keys, and shift isn't assumed.	2018-08-04 19:17:04 -04:00
Thomas Harte	558b96bc05	Corrects IIe text display.	2018-08-04 16:52:29 -04:00
Thomas Harte	c91eaaf8da	Takes a stab at double low-res graphics.	2018-07-31 21:45:09 -04:00
Thomas Harte	a36f37d240	Introduces a 1/14th delay in output of double high res.	2018-07-31 21:29:51 -04:00
Thomas Harte	3f56683342	Fixes order of deserialisation between auxiliary and base RAM.	2018-07-30 23:08:45 -04:00
Thomas Harte	5aa0b17720	Improves IIe paging further.	2018-07-29 23:02:27 -04:00
Thomas Harte	ede2696a77	Edges further towards implementing the IIe video subsystem. ... All video-specific switches are in place, and mostly honoured, and a IIe machine configuration is advertised at least.	2018-07-24 22:15:42 -04:00
Thomas Harte	59b9e39022	Starts the process of supporting the Apple IIe graphics modes. ... Albeit that I'm not yet even up on the proper soft switches.	2018-07-23 22:14:41 -04:00
Thomas Harte	640a84d456	Shift the h-within-v pulse to eliminate a curved top line.	2018-06-24 11:27:18 -04:00
Thomas Harte	55ab305dbf	Introduces equalisation pulses for the Apple II.	2018-06-23 22:11:39 -04:00
Thomas Harte	d380595ad4	Unrolls the loops for slightly fewer conditionals.	2018-06-03 07:27:03 -04:00
Thomas Harte	d84b8700a3	Switches the Apple II to one byte per pixel. ... Just trying to get it right for now; optimisation to come.	2018-06-02 22:03:45 -04:00
Thomas Harte	8dd7c6ef23	Eliminates 'reversed_c' as I no longer believe low-resolution colour numbers are reversed. ... Also gets explicit about phase.	2018-05-29 22:30:45 -04:00
Thomas Harte	dea9892a85	Attempts to implement vapour lock bus behaviour.	2018-05-13 18:53:32 -04:00
Thomas Harte	0b771ce61a	Removes all instances of the copyright symbol.	2018-05-13 15:19:52 -04:00
Thomas Harte	850a394eb5	Corrects graphics 'carry' — the potential holdover into delayed bytes.	2018-04-26 19:26:43 -04:00
Thomas Harte	244721a6f8	Corrects graphics mode address generation.	2018-04-25 22:26:01 -04:00
Thomas Harte	b8ae283049	Implements correct text inverse/flashing.	2018-04-19 22:14:22 -04:00
Thomas Harte	5f1c210746	Simplifies and corrects low-resolution colour generation. ... Possibly disproving the premise for this whole experiment, all colours seem immediately to work correctly. Hmmm.	2018-04-18 21:41:11 -04:00
Thomas Harte	f6c2f6e896	Slightly adjusts colour burst logic to fix transition lines in mixed mode.	2018-04-18 20:39:12 -04:00
Thomas Harte	a07c99d778	Completes first draft of Apple II video hardware.	2018-04-17 22:04:02 -04:00
Thomas Harte	1c605d58e3	Removes the CRT requirement for an integral relationship between cycles and samples.	2018-04-16 20:00:56 -04:00
Thomas Harte	6a79ce9eb1	Adds enough to the Apple II's video that I can see what's going on with soft switches.	2018-04-15 21:55:26 -04:00
Thomas Harte	465c38f03c	Extends the keyboard protocol and adds keyboard input to the Apple II.	2018-04-15 21:11:30 -04:00
Thomas Harte	be05d51e07	Now gives something a lot like the proper character output.	2018-04-15 20:31:04 -04:00
Thomas Harte	abe47b6ed8	Makes first attempt at a stable display area. Not entirely successful.	2018-04-15 18:00:40 -04:00
Thomas Harte	61659faeaa	Adds the necessary call-outs to allow implementation of video generation.	2018-04-15 15:13:07 -04:00
Thomas Harte	7efee9b52b	Does the bare minimum to create a class skeleton for Apple II implementation.	2018-04-14 19:46:15 -04:00