30 Commits

Author	SHA1	Message	Date
Thomas Harte	602e7f01c7	Control lines seem to have evolved to pure push.	2016-07-05 21:15:29 -04:00
Thomas Harte	93c2bb80a2	Improved a comment, added independent C[A/B]2 input mode.	2016-07-05 21:11:51 -04:00
Thomas Harte	1bb109a23b	Made a quick attempt at basic C[A/B]2 interrupts.	2016-07-05 20:39:15 -04:00
Thomas Harte	c3b7d24293	It appears that the attention line is also wired to CB2. So the ball is back in the 6522's court.	2016-07-05 19:19:46 -04:00
Thomas Harte	97751a9d86	Took the preliminary steps necessary to wire up a serial port.	2016-07-05 10:55:47 -04:00
Thomas Harte	82b0bc9b58	Discovered that this is another meaningful usage of using.	2016-07-04 19:10:10 -04:00
Thomas Harte	7fa010a463	Attempted to add support for the most basic of control line output, and slightly to optimise the Vic.	2016-07-01 19:01:22 -04:00
Thomas Harte	69d78dfdb3	Removed logging.	2016-06-26 21:36:26 -04:00
Thomas Harte	843d1fdca7	Added some extra logging while trying to determine what's going on; added interrupt clearing for the control lines.	2016-06-26 21:30:06 -04:00
Thomas Harte	c306d705e1	Made a quick first attempt at all-the-way-through tape wiring for the Vic.	2016-06-26 19:43:09 -04:00
Thomas Harte	37ba42a52f	Factored out the stuff of playing a tape, started basic sketch of the Vic-related classes.	2016-06-26 19:03:57 -04:00
Thomas Harte	066db59773	Made a hasty attempt to implement CA1 and CB1 input as a potential source of interrupts.	2016-06-26 16:32:27 -04:00
Thomas Harte	d5e50f5ea0	Got a bit more explicit about how ports are identified on the 6522.	2016-06-26 12:30:01 -04:00
Thomas Harte	65413f078c	Factored out the 6532, eventually to make it testable.	2016-06-19 18:57:40 -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	f4915c5ad6	Fixed test and added basic implementation of data direction.	2016-06-18 17:17:03 -04:00
Thomas Harte	5d26cd85a3	Wrote test case for what appears to be correct timer behaviour if those were acting in isolation. Ensured implementation matches test case.	2016-06-18 14:30:23 -04:00
Thomas Harte	394902f409	Switched to clocking the 6522 by the half-cycle. Very trivial test now passes.	2016-06-18 13:57:10 -04:00
Thomas Harte	595791cee0	Made the base 6522 class more abstract: you must now opt-in if you want the IRQ line to be sent to a delegate.	2016-06-18 08:51:18 -04:00
Thomas Harte	d1731b1d26	Hacked my 6522 to work. Mistake is in not returning output as input when appropriate — i.e. that I'm ignoring data direction. Also fixed K and L keys.	2016-06-11 13:06:01 -04:00
Thomas Harte	7a241b5ef5	Added just enough hopefully to allow implementation of the keyboard-input VIA.	2016-06-11 11:34:39 -04:00
Thomas Harte	de84758862	This is how flags writes are supposed to work, it seems.	2016-06-11 07:58:32 -04:00
Thomas Harte	1054793fd7	Fixed interrupt enable register. This makes a lot more sense!	2016-06-11 07:57:04 -04:00
Thomas Harte	82a3c4964b	Decided to keep the internal copy of the interrupt enable the other way around. Reduced delegate noise.	2016-06-11 07:49:07 -04:00
Thomas Harte	a71259dec3	Gave the 6522 a full and grouped register set.	2016-06-11 07:12:55 -04:00
Thomas Harte	f3b1d7de82	... and that's a flashing cursor. Keyboard input next!	2016-06-09 22:37:59 -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