Thomas Harte
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3d8fc9952d
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Remove dead TODO, correct for overflow position.
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2021-06-29 15:44:02 -04:00 |
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Thomas Harte
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8ce8fbd977
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Provide correct input when one of the tone generators is the interrupt source.
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2021-06-29 15:41:08 -04:00 |
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Thomas Harte
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7f08218b28
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The Nick interrupt input also seems to be a live poll, not a retrieval of the mask.
This corrects the two pieces of software I knew not to be working.
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2021-06-28 22:10:11 -04:00 |
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Thomas Harte
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2c139ad931
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Adds some notes to self.
I think I'm starting to find enough information to handle tapes.
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2021-06-28 22:03:06 -04:00 |
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Thomas Harte
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1119779c8b
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Ensure EXDOS card is completely disabled if no FDC is present.
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2021-06-28 21:47:53 -04:00 |
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Thomas Harte
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5351ac560f
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Ensure the motor goes off for unselected drives.
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2021-06-28 21:40:12 -04:00 |
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Thomas Harte
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49f0ab0f15
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Add note to self.
Although I still think there may be some issue lurking.
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2021-06-28 21:31:55 -04:00 |
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Thomas Harte
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a5c57e777e
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VRES appears to work negatively in attribute mode too.
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2021-06-28 21:24:13 -04:00 |
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Thomas Harte
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3c59042388
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Fixes initial state for 1kHz.
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2021-06-28 21:08:41 -04:00 |
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Thomas Harte
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919e211bc4
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Reduces number of interrupt-related sequence points.
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2021-06-28 19:30:12 -04:00 |
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Thomas Harte
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daa0737ce4
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Ensure addresses tick upwards even during sync/burst; correct 2/4/8bpp character sizing.
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2021-06-28 19:00:51 -04:00 |
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Thomas Harte
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36805cb120
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Correct tone channel interrupts, remove dead warning.
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2021-06-27 23:21:00 -04:00 |
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Thomas Harte
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7de69e9874
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Makes an attempt to round out the timed interrupts.
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2021-06-27 23:09:11 -04:00 |
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Thomas Harte
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b93575bbcc
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Spots that b0 and b2 of 0xb4 are 'dividers', not enables.
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2021-06-27 22:33:20 -04:00 |
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Thomas Harte
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116e0f0105
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Interupts 1kHz and 50Hz interrupts, while edging towards tone generator interrupts.
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2021-06-27 22:08:38 -04:00 |
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Thomas Harte
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e4a650aaff
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Implements the 1Hz interrupt.
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2021-06-27 21:47:21 -04:00 |
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Thomas Harte
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b5312b9ba0
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get_interrupt_line can be const.
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2021-06-27 21:37:11 -04:00 |
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Thomas Harte
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6afee7bb9b
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Captures appropriate fields.
No action yet.
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2021-06-27 21:36:55 -04:00 |
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Thomas Harte
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2f53b105bb
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The Enterprise is now an Activity::Source; also sketches out the owner of Dave's timed interrupt logic.
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2021-06-27 21:02:04 -04:00 |
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Thomas Harte
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be19fa9dde
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This mapping needs to know where it will occur.
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2021-06-27 17:30:09 -04:00 |
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Thomas Harte
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81e9ba5608
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This is correct from the Enterprise's side of things, I think.
I just need to complete the missing part of JustInTimeActor. After I do some empirical testing of this.
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2021-06-27 17:24:21 -04:00 |
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Thomas Harte
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f2d7b9f6a9
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Apply a crop, allow time until Z80 slot to be a future-based query.
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2021-06-27 17:13:07 -04:00 |
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Thomas Harte
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1ea034310a
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Edge up very close to video waits.
I just need to implement back conversions that include marginal phase over in the JustInTimeActor.
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2021-06-27 16:28:01 -04:00 |
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Thomas Harte
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895d98e266
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Implements out-of-video-area pauses.
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2021-06-27 16:11:22 -04:00 |
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Thomas Harte
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903e343895
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Attempts to complete Dave's audio duties.
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2021-06-27 14:06:49 -04:00 |
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Thomas Harte
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f8b7c59616
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Corrects tone frequency.
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2021-06-26 23:51:43 -04:00 |
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Thomas Harte
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fcd267a3f9
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Starts implementing noise.
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2021-06-26 23:48:53 -04:00 |
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Thomas Harte
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f8bb66d2a0
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Attempts an essentially-complete implementation of tone channels.
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2021-06-26 23:39:59 -04:00 |
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Thomas Harte
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f2336d2efc
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I think reloads occur after overflow, not before.
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2021-06-26 23:16:00 -04:00 |
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Thomas Harte
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c2d093fa3c
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Respect user volume input.
Basic tones are now present. Neato!
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2021-06-24 22:27:02 -04:00 |
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Thomas Harte
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1a97cc8a91
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Start making some effort towards audio generation.
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2021-06-24 22:21:01 -04:00 |
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Thomas Harte
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c34a548fa0
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Ensure character pixel reads can't go out of bounds.
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2021-06-24 22:19:50 -04:00 |
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Thomas Harte
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520c3c9218
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Corrects colour deserialisation.
Long story short: the documentation I'm reading inexplicably lists the bits in reverse order. Luckily, a lot of the other documentation doesn't.
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2021-06-24 20:59:04 -04:00 |
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Thomas Harte
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9230cf1726
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Corrects bug when left_ or right_margin_ = 0.
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2021-06-24 20:28:50 -04:00 |
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Thomas Harte
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6e616972a5
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Better binds margin tests to window movements; simplifies line parameter addressing.
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2021-06-24 18:55:15 -04:00 |
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Thomas Harte
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f98888824d
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Switches to an overt active/inactive state machine.
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2021-06-24 18:34:21 -04:00 |
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Thomas Harte
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6c8b23e708
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Alters 4bpp mapping; adds character mode 4bpp and 8bpp.
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2021-06-23 19:35:47 -04:00 |
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Thomas Harte
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2c2bb3765f
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Withdraws the EPDOS option.
At least for now; it's something to worry about later.
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2021-06-23 19:32:34 -04:00 |
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Thomas Harte
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0d165740ea
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Honours memory size request.
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2021-06-22 21:48:55 -04:00 |
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Thomas Harte
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8319aca351
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Correct syntax errors.
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2021-06-22 20:50:03 -04:00 |
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Thomas Harte
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a66734883a
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Starts sketching out Dave.
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2021-06-22 19:33:41 -04:00 |
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Thomas Harte
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e062780968
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Extends back to 128kb and stops halting on unrecognised ports.
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2021-06-22 06:15:42 -04:00 |
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Thomas Harte
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3acd0be1f7
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Copy and paste 2bpp character support.
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2021-06-21 23:27:13 -04:00 |
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Thomas Harte
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c1678d7be7
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Corrects exposition and transmission of drive selection.
What a klutz I've been.
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2021-06-21 22:56:25 -04:00 |
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Thomas Harte
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117f9a9794
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Adds notes on intended meaning of status register.
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2021-06-21 07:31:58 -04:00 |
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Thomas Harte
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b49cc407c6
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Adds some guesses as to the EXDos expansion.
... with plenty left to do.
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2021-06-20 22:30:27 -04:00 |
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Thomas Harte
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954386f1cc
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Creates a shell for the disk-drive add-on card.
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2021-06-20 20:50:23 -04:00 |
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Thomas Harte
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d7ff6bd04d
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Adds necessary declarations to install a DOS ROM.
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2021-06-20 20:30:54 -04:00 |
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Thomas Harte
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6025516f9f
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Ensure addresses increment even when there's no target for pixels.
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2021-06-20 14:31:02 -04:00 |
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Thomas Harte
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d8b9cdf7a2
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Correct multiplier.
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2021-06-20 14:25:37 -04:00 |
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