Thomas Harte
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77ce200fbb
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Simplified/corrected AY tone/noise mixer logic, and made a new guess at the effect of reading registers that are smaller than 8 bits.
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2016-11-09 21:21:17 -05:00 |
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Thomas Harte
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fa65cc2058
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Resolved type conversion error.
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2016-11-05 12:57:01 -04:00 |
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Thomas Harte
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30c670f8de
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Ensured programmatic setting of the timers occurs during phase 2 _instead_ of counting.
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2016-11-04 21:30:18 -04:00 |
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Thomas Harte
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21604376e6
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Reintroduced clocking of the AY and boxed in the range of the master divider a little further.
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2016-10-30 22:51:08 -04:00 |
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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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fd823dc222
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Settled on terminology.
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2016-10-23 20:42:49 -04:00 |
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Thomas Harte
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b12f2f2796
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Switched to more straightforward version of two-step loop, dealing with my mistaken dealing of when _master_divider&15 == 0 upon entry without adding an extra sanity check. Am also temporarily on non-modulo logic for tone generation, for a profiling test.
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2016-10-23 20:32:48 -04:00 |
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Thomas Harte
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583db88299
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Added a dispatch queue-powered Apple implementation of the async task queue, removed any mention of skip_samples in the AY since it isn't implemented.
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2016-10-22 21:58:45 -04:00 |
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Thomas Harte
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33e628a096
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Made an attempt to eliminate what amounts to manual division.
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2016-10-21 22:16:44 -04:00 |
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Thomas Harte
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46a3c0922f
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Slightly simplified code, fixed divider.
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2016-10-21 22:12:44 -04:00 |
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Thomas Harte
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d7c0c49715
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Might as well be consistent with divider loads.
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2016-10-21 20:07:14 -04:00 |
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Thomas Harte
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782ef960e1
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Sought both to [start to] optimise the AY and correct divider reloads. It turns out that conditionals aren't that troubling. But I can probably eliminate the counters.
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2016-10-21 20:05:38 -04:00 |
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Thomas Harte
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cd59eb5f43
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Implemented non-linear volume.
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2016-10-19 23:07:51 -04:00 |
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Thomas Harte
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b59da7d4bc
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Added some documentation.
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2016-10-19 22:47:44 -04:00 |
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Thomas Harte
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08275c6241
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Fixed mixer IO bit usage.
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2016-10-19 22:22:15 -04:00 |
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Thomas Harte
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59162228ef
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Reduced mask for clarity.
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2016-10-19 22:14:05 -04:00 |
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Thomas Harte
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319d7c2b12
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Fixed premature wrapping of the envelope, played about with whether that should be subject to a predivision by 256. It feels unlikely?
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2016-10-19 22:12:51 -04:00 |
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Thomas Harte
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6073906c39
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Commented and fixed mistake that would equate any noise divider > 32768 with 0.
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2016-10-19 21:51:35 -04:00 |
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Thomas Harte
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101f168ea4
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Made an attempt to tidy up.
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2016-10-19 21:43:18 -04:00 |
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Thomas Harte
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ada37abe23
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Made an attempt to implement noise and envelopes. Not quite right yet.
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2016-10-19 21:13:22 -04:00 |
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Thomas Harte
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bd6e6674a0
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Fixed signed shift assumption and noise-related register test.
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2016-10-18 22:20:12 -04:00 |
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Thomas Harte
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9669a5ec9b
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Switched to a more authentic interfacing to the AY.
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2016-10-18 19:32:15 -04:00 |
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Thomas Harte
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43612e1ca2
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Made an attempt to eliminate conditionals (running before I can walk?) and started edging towards an envelope generator.
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2016-10-17 08:03:38 -04:00 |
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Thomas Harte
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9730e8247f
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Ensured propagation of synchronise messages, added enough to do plain tone. Probably. So: noise and envelopes missing. And it's all far too quiet.
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2016-10-15 21:04:21 -04:00 |
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Thomas Harte
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51bdac27ae
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Made some AY advances; it's now being polled for samples and collecting more information on what it needs to output.
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2016-10-15 17:45:39 -04:00 |
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Thomas Harte
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288d10c253
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Got some keyboard reaction.
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2016-10-14 21:44:15 -04:00 |
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Thomas Harte
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138eabcff4
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Continued in my effort to wire up a keyboard. Will need further to continue.
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2016-10-14 21:35:15 -04:00 |
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Thomas Harte
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d8e4c488c2
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Started iterating towards having an AY and a fully-working keyboard.
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2016-10-14 21:18:03 -04:00 |
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Thomas Harte
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922dd6a586
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Hit up the other two kinds of audio generator.
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2016-10-07 17:10:00 -04:00 |
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Thomas Harte
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79412dc84d
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Upped MFM clock cycles, switched back to using the typer for the ADFS and adjusted ADFS ROM slots.
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2016-09-28 21:28:34 -04:00 |
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Thomas Harte
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91235c7fd7
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Fixed issue whereby parts of data that merely looked like index or ID address marks within tracks caused a resynchronisation of the tokeniser.
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2016-09-27 07:36:37 -04:00 |
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Thomas Harte
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6330e5706c
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Fixed seek verify. First ADFS directory is visible.
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2016-09-25 21:44:46 -04:00 |
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Thomas Harte
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4db086949a
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Made an attempt to add MFM decoding to the 1770; ensured something is returned when reading the Plus 3 status register again.
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2016-09-25 21:38:52 -04:00 |
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Thomas Harte
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572d5587d9
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Made a first stab at enabling multi-disk machines and thereby obeying (some of) the Plus 3's status register.
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2016-09-25 21:24:16 -04:00 |
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Thomas Harte
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9bbcbd1001
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Renamed class, intending to turn a Disk::Drive into literally just that, and have a thing with a PLL that consumes events be a Controller.
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2016-09-25 20:05:56 -04:00 |
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Thomas Harte
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6084020ab3
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Added shift-break as a better way to boot suitable disks. Continued attempting to clean the 1770.
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2016-09-25 14:11:22 -04:00 |
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Thomas Harte
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a538b45213
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Sought to implement the verify step of type 1 commands.
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2016-09-25 09:54:49 -04:00 |
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Thomas Harte
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0918751802
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Fixed stepping out.
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2016-09-24 22:48:45 -04:00 |
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Thomas Harte
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9e1d4c8b01
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Fixed an initial setup error with seek.
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2016-09-24 22:43:12 -04:00 |
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Thomas Harte
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d50629e6aa
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This is clearly the winning solution. Edited down.
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2016-09-24 22:36:38 -04:00 |
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Thomas Harte
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07ff5138b7
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The catalogue now loads.
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2016-09-24 22:35:34 -04:00 |
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Thomas Harte
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1b69ad0fd4
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This attempts to implment sector reading. DFS reports an error.
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2016-09-24 22:29:02 -04:00 |
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Thomas Harte
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ce4100e5b9
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Fixed slots for DFS and ADFS to sideways RAM; continued working on the 1770 to get as far as trying to get the body of a sector.
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2016-09-24 22:04:54 -04:00 |
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Thomas Harte
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7154e8986e
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Fixed stepping delay.
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2016-09-24 20:16:23 -04:00 |
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Thomas Harte
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53522e28e2
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Performed an about-face on how this should probably be implemented. Now forsaking the state machine in favour of a macro'd switch-for-cooperative-event-based-messaging implementation. Let's see how this ends up looking.
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2016-09-24 20:12:45 -04:00 |
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Thomas Harte
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88bbeedad3
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Set actual bit length.
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2016-09-22 21:28:23 -04:00 |
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Thomas Harte
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75eb62b577
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One painful step at a time, this now starts the disk rotating and gets as far as deciding whether it's about to head off on a read or a write.
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2016-09-22 21:25:31 -04:00 |
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Thomas Harte
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8db0030068
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Fixed ROM loading by the Electron, turned the WD1770 into a 'disk drive' (it'll do for now), persuaded it to get all the way through a very specifically convenient type 1 command.
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2016-09-20 22:14:33 -04:00 |
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Thomas Harte
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7a34ae0da6
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This is the start of my slog through type 1 commands. I kind of need to figure out what I'm doing about drives and PLLs now though.
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2016-09-20 16:58:23 -04:00 |
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Thomas Harte
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3b97b038b9
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Corrected and sketched out state machine far enough to get to a complaint about unhandled work.
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2016-09-20 15:56:31 -04:00 |
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Thomas Harte
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a9e65e9b7a
|
Tweaked disk side density, added call-outs to a WD1770 if the Electron had one (albeit without run_for_cycles yet as I need to figure out the clock rate), added a shell of the basic functions of the WD1770. No implementation yet.
|
2016-09-19 22:06:56 -04:00 |
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Thomas Harte
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bcf91de7e9
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Declared support for the Acorn disk files, started hammering out an encoder.
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2016-09-18 13:35:54 -04:00 |
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Thomas Harte
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e3daf80564
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Added a file for the 1770, at least.
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2016-09-17 18:01:00 -04:00 |
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Thomas Harte
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eeec516fa6
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Implemented seeking on tapes, mucked about a bit more with the Commodore analyser, at least temporarily removed cropping from the Vic emulator.
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2016-09-11 17:09:00 -04:00 |
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Thomas Harte
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1541273785
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Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately.
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2016-08-21 18:13:31 -04:00 |
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Thomas Harte
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c783090980
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It turns out that the Vic has a 1.6Khz low-pass filter. So added that.
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2016-08-21 12:13:41 -04:00 |
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Thomas Harte
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8d839c5278
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I think this is correct. And have explained why.
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2016-08-20 16:54:43 -04:00 |
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Thomas Harte
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7c9455251d
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Fixed reload for the lower-frequency audio channels.
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2016-08-19 17:34:01 -04:00 |
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Thomas Harte
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99157ad6b2
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Ensured the 6560 knows its real audio clock on a PAL machine; removed some stray semicolons.
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2016-08-19 13:35:34 -04:00 |
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Thomas Harte
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902c0f967a
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Implements known phase pattern for PAL output.
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2016-08-17 08:09:48 -04:00 |
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Thomas Harte
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142774be37
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Collapsed 6560 template to a more direct loop, albeit with quite a bit still left to fix.
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2016-08-09 21:10:53 -04:00 |
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Thomas Harte
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12bad8f23f
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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.
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2016-08-09 20:41:05 -04:00 |
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Thomas Harte
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3e65450a54
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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.
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2016-08-06 14:33:24 -04:00 |
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Thomas Harte
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c6e046253e
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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.
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2016-08-05 19:13:49 -04:00 |
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Thomas Harte
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5d40d70c92
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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.
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2016-08-01 10:32:32 -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
|
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
|
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
|
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
|
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
|
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
|
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 |
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Thomas Harte
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97751a9d86
|
Took the preliminary steps necessary to wire up a serial port.
|
2016-07-05 10:55:47 -04:00 |
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Thomas Harte
|
88964ceac0
|
Eliminated plain pointer passing for object types.
|
2016-07-04 19:33:55 -04:00 |
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Thomas Harte
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82b0bc9b58
|
Discovered that this is another meaningful usage of using.
|
2016-07-04 19:10:10 -04:00 |
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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 |
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Thomas Harte
|
5c85366de2
|
Made an attempt to prevent spurious border colour pushes.
|
2016-06-29 21:22:26 -04:00 |
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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 |
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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 |
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Thomas Harte
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de5d2f1113
|
Ensured the line counter increments late on NTSC.
|
2016-06-27 22:12:55 -04:00 |
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Thomas Harte
|
69d78dfdb3
|
Removed logging.
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2016-06-26 21:36:26 -04:00 |
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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 |
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Thomas Harte
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c306d705e1
|
Made a quick first attempt at all-the-way-through tape wiring for the Vic.
|
2016-06-26 19:43:09 -04:00 |
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Thomas Harte
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37ba42a52f
|
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
|
Made a hasty attempt to implement CA1 and CB1 input as a potential source of interrupts.
|
2016-06-26 16:32:27 -04:00 |
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Thomas Harte
|
d5e50f5ea0
|
Got a bit more explicit about how ports are identified on the 6522.
|
2016-06-26 12:30:01 -04:00 |
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Thomas Harte
|
3c9183d034
|
Improved some commenting.
|
2016-06-23 20:43:29 -04:00 |
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Thomas Harte
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359ffb9aa7
|
Made some attempt to implement what appears to be the proper address generation logic.
|
2016-06-23 07:32:24 -04:00 |
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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 |
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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 |
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Thomas Harte
|
fe17d1778c
|
Expanded 6532 tests substantially, beefing up implementation to match.
|
2016-06-20 21:02:42 -04:00 |
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Thomas Harte
|
88e2b382e5
|
Made an attempt at a full and thorough 6532 implementation (and got a bit more explicit about flag size in the 6502).
|
2016-06-20 18:57:35 -04:00 |
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Thomas Harte
|
d4b9ff0ca4
|
Doubles up on register mirroring. Will do for now. More to come.
|
2016-06-20 07:27:38 -04:00 |
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Thomas Harte
|
4db61d98f4
|
Killed the .cpp.
|
2016-06-19 20:21:38 -04:00 |
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Thomas Harte
|
7cf6008e7c
|
Started some very basic RIOT unit tests; corrected to pass.
|
2016-06-19 20:12:47 -04:00 |
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