Thomas Harte
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ad00304e8a
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Fixed 6522 countdown.
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2016-10-28 21:05:42 -04:00 |
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Thomas Harte
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4fab794747
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Added a direct-to-two-cycles emulation path for 6522 owners.
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2016-10-27 21:13:25 -04:00 |
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Thomas Harte
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2eda0b3c86
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Attempted to simplify the logic behind the most common 6522 usage.
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2016-10-27 21:06:31 -04:00 |
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Thomas Harte
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b43a7381ae
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Fixed framing and first-byte-after-sync signalling. Hacked together as parts of it are, loading now appears to work!
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2016-08-01 04:25:11 -04:00 |
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Thomas Harte
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11cd541786
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Fixed accidental indentation.
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2016-07-10 08:05:05 -04:00 |
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Thomas Harte
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c0ab45a73d
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Disabled a bunch of the caveman debug logging.
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2016-07-09 22:29:11 -04:00 |
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Thomas Harte
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7cc4bf3fe7
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Hit and hope is getting me nowhere. Time to unit test this thing.
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2016-07-09 15:40:25 -04:00 |
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Thomas Harte
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1baf21827c
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Since the ROM is well disassembled, let's actually try to be a 1541 first.
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2016-07-06 22:17:32 -04:00 |
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Thomas Harte
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8819711bc8
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Threw in the second VIA as a currently clearly incorrect thing.
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2016-07-05 22:22:09 -04:00 |
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Thomas Harte
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602e7f01c7
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Control lines seem to have evolved to pure push.
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2016-07-05 21:15:29 -04:00 |
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Thomas Harte
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93c2bb80a2
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Improved a comment, added independent C[A/B]2 input mode.
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2016-07-05 21:11:51 -04:00 |
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Thomas Harte
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1bb109a23b
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Made a quick attempt at basic C[A/B]2 interrupts.
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2016-07-05 20:39:15 -04:00 |
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Thomas Harte
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c3b7d24293
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It appears that the attention line is also wired to CB2. So the ball is back in the 6522's court.
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2016-07-05 19:19:46 -04:00 |
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Thomas Harte
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97751a9d86
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Took the preliminary steps necessary to wire up a serial port.
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2016-07-05 10:55:47 -04:00 |
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Thomas Harte
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82b0bc9b58
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Discovered that this is another meaningful usage of using.
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2016-07-04 19:10:10 -04:00 |
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Thomas Harte
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7fa010a463
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Attempted to add support for the most basic of control line output, and slightly to optimise the Vic.
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2016-07-01 19:01:22 -04:00 |
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Thomas Harte
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69d78dfdb3
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Removed logging.
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2016-06-26 21:36:26 -04:00 |
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Thomas Harte
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843d1fdca7
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Added some extra logging while trying to determine what's going on; added interrupt clearing for the control lines.
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2016-06-26 21:30:06 -04:00 |
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Thomas Harte
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c306d705e1
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Made a quick first attempt at all-the-way-through tape wiring for the Vic.
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2016-06-26 19:43:09 -04:00 |
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Thomas Harte
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37ba42a52f
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Factored out the stuff of playing a tape, started basic sketch of the Vic-related classes.
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2016-06-26 19:03:57 -04:00 |
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Thomas Harte
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066db59773
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Made a hasty attempt to implement CA1 and CB1 input as a potential source of interrupts.
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2016-06-26 16:32:27 -04:00 |
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Thomas Harte
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d5e50f5ea0
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Got a bit more explicit about how ports are identified on the 6522.
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2016-06-26 12:30:01 -04:00 |
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Thomas Harte
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65413f078c
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Factored out the 6532, eventually to make it testable.
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2016-06-19 18:57:40 -04:00 |
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Thomas Harte
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ce2f5515c0
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Made some minor documentation improvements, killed 6522.cpp as the 6522 is going to be a template only, attempting to promote good inlining behaviour.
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2016-06-19 18:11:37 -04:00 |
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Thomas Harte
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f4915c5ad6
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Fixed test and added basic implementation of data direction.
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2016-06-18 17:17:03 -04:00 |
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Thomas Harte
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5d26cd85a3
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Wrote test case for what appears to be correct timer behaviour if those were acting in isolation. Ensured implementation matches test case.
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2016-06-18 14:30:23 -04:00 |
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Thomas Harte
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394902f409
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Switched to clocking the 6522 by the half-cycle. Very trivial test now passes.
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2016-06-18 13:57:10 -04:00 |
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Thomas Harte
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595791cee0
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Made the base 6522 class more abstract: you must now opt-in if you want the IRQ line to be sent to a delegate.
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2016-06-18 08:51:18 -04:00 |
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Thomas Harte
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d1731b1d26
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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.
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2016-06-11 13:06:01 -04:00 |
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Thomas Harte
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7a241b5ef5
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Added just enough hopefully to allow implementation of the keyboard-input VIA.
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2016-06-11 11:34:39 -04:00 |
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Thomas Harte
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de84758862
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This is how flags writes are supposed to work, it seems.
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2016-06-11 07:58:32 -04:00 |
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Thomas Harte
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1054793fd7
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Fixed interrupt enable register. This makes a lot more sense!
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2016-06-11 07:57:04 -04:00 |
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Thomas Harte
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82a3c4964b
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Decided to keep the internal copy of the interrupt enable the other way around. Reduced delegate noise.
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2016-06-11 07:49:07 -04:00 |
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Thomas Harte
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a71259dec3
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Gave the 6522 a full and grouped register set.
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2016-06-11 07:12:55 -04:00 |
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Thomas Harte
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f3b1d7de82
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... and that's a flashing cursor. Keyboard input next!
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2016-06-09 22:37:59 -04:00 |
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Thomas Harte
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e99055bedb
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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.
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2016-06-08 22:15:24 -04:00 |
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Thomas Harte
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581eace478
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Increased logging slightly, ensured all of colour RAM can be read, slightly improved the 2600 pixel decoder.
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2016-06-07 22:01:14 -04:00 |
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Thomas Harte
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26ab96868a
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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.
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2016-06-07 19:15:18 -04:00 |
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Thomas Harte
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6522530e1c
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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.
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2016-06-06 21:56:02 -04:00 |
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