154 Commits

Author	SHA1	Message	Date
Thomas Harte	12bad8f23f	Turned the 6560 into an ordinary template, similar to the rest of the project, albeit right now with a fairly shonky internal implementation. Fixed a Mac-specific interface sizing issue.	2016-08-09 20:41:05 -04:00
Thomas Harte	3e65450a54	Converted the 6560 fully into a template; worked on allowing the typer to run at a much faster rate where hardware has some trigger by which it can request the next key.	2016-08-06 14:33:24 -04:00
Thomas Harte	c6e046253e	Shunted code for the main part up into the header, in advance of turning it into a template so as to bring it inside the normal orthodoxy.	2016-08-05 19:13:49 -04:00
Thomas Harte	5d40d70c92	Fixed 6560 addressing error, added an autotyper for Vic disks (more work potentially needed), fixed semantics for testing whether a 6502 is about to reset.	2016-08-01 10:32:32 -04:00
Thomas Harte	88964ceac0	Eliminated plain pointer passing for object types.	2016-07-04 19:33:55 -04:00
Thomas Harte	5c85366de2	Made an attempt to prevent spurious border colour pushes.	2016-06-29 21:22:26 -04:00
Thomas Harte	ff53accca0	Demonstrated that issue is coloured borders, made a guess as to buffer exhaustion, upped limits as a temporary fix.	2016-06-29 21:16:34 -04:00
Thomas Harte	0182b0483a	Added a 'power on' flag that is set automatically at construction but can be declined. Saves all that stuff of every machine having to set and then unset the RST line, and fixes an Electron bug related to that.	2016-06-29 19:13:24 -04:00
Thomas Harte	de5d2f1113	Ensured the line counter increments late on NTSC.	2016-06-27 22:12:55 -04:00
Thomas Harte	3c9183d034	Improved some commenting.	2016-06-23 20:43:29 -04:00
Thomas Harte	359ffb9aa7	Made some attempt to implement what appears to be the proper address generation logic.	2016-06-23 07:32:24 -04:00
Thomas Harte	b753690d5e	Made an attempt to adjust the 6560 to a model compatible with that advocated by the available documentation. Exact decision timing may need further work.	2016-06-21 22:12:01 -04:00
Thomas Harte	106e56600d	Added a DC offset for 6560 volume level, albeit one plucked from thin air.	2016-06-21 07:31:14 -04:00
Thomas Harte	ce2f5515c0	Made some minor documentation improvements, killed 6522.cpp as the 6522 is going to be a template only, attempting to promote good inlining behaviour.	2016-06-19 18:11:37 -04:00
Thomas Harte	ce7488dd30	Added support for _invertedCells. Treading water a little before making real changes.	2016-06-14 21:06:29 -04:00
Thomas Harte	926f819e3b	Added some documentation, made the speaker private.	2016-06-14 20:00:16 -04:00
Thomas Harte	a2a6e3c818	Fixed phase offsets.	2016-06-14 18:19:06 -04:00
Thomas Harte	f4884a3481	Added the noise channel, albeit not very creatively.	2016-06-14 17:50:32 -04:00
Thomas Harte	c18cc4c8f5	It appears the Vic's output is sine-ish, after all. Also adjusted centre of display, simultaneously adding some validation on that.	2016-06-14 07:29:35 -04:00
Thomas Harte	fdc854c0c2	Fixed tone channels; made an attempt at loading PRGs that are supposed to go into RAM.	2016-06-13 21:49:59 -04:00
Thomas Harte	efcb196ef7	Made a complete attempt at the tone channels.	2016-06-13 20:59:01 -04:00
Thomas Harte	f1a45c1011	Merge branch 'VicAudio' into Vic-20	2016-06-13 19:34:13 -04:00
Thomas Harte	2d23bc46f2	Whoops; fixed line count target test.	2016-06-13 19:34:01 -04:00
Thomas Harte	5fc36b956c	Attempted most basic sketching of a container for Vic audio.	2016-06-13 19:30:52 -04:00
Thomas Harte	91c406e065	Made an attempt to honour interlaced-frame line counts.	2016-06-13 18:21:21 -04:00
Thomas Harte	2e946e785f	Settled on half-intensity colour for now, appears likely not to be too incorrect(?)	2016-06-13 18:20:21 -04:00
Thomas Harte	e10535181d	Made an attempt to implement interlaced video.	2016-06-12 22:27:58 -04:00
Thomas Harte	4ad55a7f5e	Trimmed the visible area.	2016-06-12 18:01:38 -04:00
Thomas Harte	a5efa7543a	Added vertical sync, switching fully to the normal NTSC colour space.	2016-06-12 17:57:52 -04:00
Thomas Harte	4c2b964cd4	Added NTSC-VIC's switching of phase every field.	2016-06-12 17:45:25 -04:00
Thomas Harte	6b5a322918	Fixed all colours, plus special case no-chroma for black and white.	2016-06-12 17:41:52 -04:00
Thomas Harte	580c8bdcbd	Ported rest.	2016-06-12 17:29:44 -04:00
Thomas Harte	1a2b18f93b	Steps towards CPU mapping; diagnostic.	2016-06-12 17:27:57 -04:00
Thomas Harte	8abf395202	Experimented with table-based GLSL lookups, and a sine curve. Now _exceedingly_ slow, but colours are correct if I pretend I'm in the YUV colour space.	2016-06-12 14:57:24 -04:00
Thomas Harte	2992183aae	Switched to a lookup table for phase, temporarily in YUV colour space, probably. Working on it.	2016-06-12 14:39:17 -04:00
Thomas Harte	ed76e36b18	Made basic attempt at 16-line character mode.	2016-06-12 11:23:57 -04:00
Thomas Harte	1ed04fae1e	Resolved 6560 addressing.	2016-06-10 18:12:21 -04:00
Thomas Harte	f3b1d7de82	... and that's a flashing cursor. Keyboard input next!	2016-06-09 22:37:59 -04:00
Thomas Harte	30b7db3979	Attempted a square wave, made the Vic itself responsible for address manipulation re:the 6560.	2016-06-09 22:05:17 -04:00
Thomas Harte	e99055bedb	Attempted switching back to a square wave for the composite video and otherwise implementing what's necessary to get to that flashing cursor — the 6560 returns its scan line and the timing bits of the 6522 are appearing.	2016-06-08 22:15:24 -04:00
Thomas Harte	581eace478	Increased logging slightly, ensured all of colour RAM can be read, slightly improved the 2600 pixel decoder.	2016-06-07 22:01:14 -04:00
Thomas Harte	26ab96868a	Decided to turn the 6522 into a template, since it's a per-cycle thing with variable behaviour. Added appropriate memory map callouts to hit the two in the Vic. Though they don't yet do anything.	2016-06-07 19:15:18 -04:00
Thomas Harte	6522530e1c	Actually, I'm dithering over whether the 6522 should be an ordinary class or a curiously-recurring template. But it'll need a file, definitely.	2016-06-06 21:56:02 -04:00
Thomas Harte	ca23e2e10a	This now proceeds to an ostensibly working basic prompt. Colours are wrong, 6560 is probably very wrong, 6522 is still absent. Hence no cursor.	2016-06-06 20:33:06 -04:00
Thomas Harte	c7c55528e2	Realised that registers appear also to be readable.	2016-06-06 20:29:39 -04:00
Thomas Harte	e8cb674073	Made some attempt at colours, at least.	2016-06-06 20:18:24 -04:00
Thomas Harte	89c87c3e81	Some major hackiness gives the first line of expected text repeating endlessly (as the end of columns is never reached, as that's back to thinking it's 0x7f); I also don't yet know which actor is supposed to do the '+0x8000' (which probably shouldn't be that but might be a pin on the 6560 indicating what sort of value is being fetched, that effects chip select for the various bits of memory?)	2016-06-06 07:47:30 -04:00
Thomas Harte	64539a2b24	Advanced to having some characters displayed, even though they're obviously very much incorrect and the display is still rolling.	2016-06-06 07:35:35 -04:00
Thomas Harte	79e05a2413	Without yet figuring out what vertical sync is meant to do, moved just about far enough forwards to see _something_ that hopefully I can soon discern characters within.	2016-06-05 18:02:49 -04:00
Thomas Harte	444d3b69b6	Made some elementary attempt to hit something like the correct states within the VIC.	2016-06-05 17:06:10 -04:00
Thomas Harte	9e9e50edb1	Added guess on how colour memory and the 12-bit bus possibly works.	2016-06-05 16:28:06 -04:00
Thomas Harte	3be1ce457b	Made some attempt at discerning fields.	2016-06-05 14:05:31 -04:00
Thomas Harte	9566c87532	Added enough to the machine that the 6560 can now produce output if it wishes.	2016-06-05 12:11:12 -04:00
Thomas Harte	f922d38ed2	The Vic now captures the ROMs sent to it and has just enough infrastructure to get to a black screen. Progress!	2016-06-05 10:51:07 -04:00