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Author SHA1 Message Date
Thomas Harte
49f0ab0f15 Add note to self. 
Although I still think there may be some issue lurking.
 2021-06-28 21:31:55 -04:00
Thomas Harte
a5c57e777e VRES appears to work negatively in attribute mode too. 2021-06-28 21:24:13 -04:00
Thomas Harte
3c59042388 Fixes initial state for 1kHz. 2021-06-28 21:08:41 -04:00
Thomas Harte
919e211bc4 Reduces number of interrupt-related sequence points. 2021-06-28 19:30:12 -04:00
Thomas Harte
daa0737ce4 Ensure addresses tick upwards even during sync/burst; correct 2/4/8bpp character sizing. 2021-06-28 19:00:51 -04:00
Thomas Harte
36805cb120 Correct tone channel interrupts, remove dead warning. 2021-06-27 23:21:00 -04:00
Thomas Harte
7de69e9874 Makes an attempt to round out the timed interrupts. 2021-06-27 23:09:11 -04:00
Thomas Harte
b93575bbcc Spots that b0 and b2 of 0xb4 are 'dividers', not enables. 2021-06-27 22:33:20 -04:00
Thomas Harte
116e0f0105 Interupts 1kHz and 50Hz interrupts, while edging towards tone generator interrupts. 2021-06-27 22:08:38 -04:00
Thomas Harte
e4a650aaff Implements the 1Hz interrupt. 2021-06-27 21:47:21 -04:00
Thomas Harte
b5312b9ba0 get_interrupt_line can be const. 2021-06-27 21:37:11 -04:00
Thomas Harte
6afee7bb9b Captures appropriate fields. 
No action yet.
 2021-06-27 21:36:55 -04:00
Thomas Harte
5729e6e13a Corrects potential JustInTimeActor overflow. 2021-06-27 21:36:41 -04:00
Thomas Harte
2f53b105bb The Enterprise is now an Activity::Source; also sketches out the owner of Dave's timed interrupt logic. 2021-06-27 21:02:04 -04:00
Thomas Harte
b698056f78 Correct divisor. 2021-06-27 17:39:13 -04:00
Thomas Harte
95c906f03d Takes a serious shot at back_map. 2021-06-27 17:36:25 -04:00
Thomas Harte
be19fa9dde This mapping needs to know where it will occur. 2021-06-27 17:30:09 -04:00
Thomas Harte
81e9ba5608 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.
 2021-06-27 17:24:21 -04:00
Thomas Harte
f2d7b9f6a9 Apply a crop, allow time until Z80 slot to be a future-based query. 2021-06-27 17:13:07 -04:00
Thomas Harte
1ea034310a Edge up very close to video waits. 
I just need to implement back conversions that include marginal phase over in the JustInTimeActor.
 2021-06-27 16:28:01 -04:00
Thomas Harte
bdcab447f9 Add a further accessor. 2021-06-27 16:27:26 -04:00
Thomas Harte
10bf6744aa Correct typo. 2021-06-27 16:26:55 -04:00
Thomas Harte
895d98e266 Implements out-of-video-area pauses. 2021-06-27 16:11:22 -04:00
Thomas Harte
903e343895 Attempts to complete Dave's audio duties. 2021-06-27 14:06:49 -04:00
Thomas Harte
f8b7c59616 Corrects tone frequency. 2021-06-26 23:51:43 -04:00
Thomas Harte
fcd267a3f9 Starts implementing noise. 2021-06-26 23:48:53 -04:00
Thomas Harte
f8bb66d2a0 Attempts an essentially-complete implementation of tone channels. 2021-06-26 23:39:59 -04:00
Thomas Harte
90782d3c27 Corrects for IntType != int. 2021-06-26 23:39:37 -04:00
Thomas Harte
f2336d2efc I think reloads occur after overflow, not before. 2021-06-26 23:16:00 -04:00
Thomas Harte
c2d093fa3c Respect user volume input. 
Basic tones are now present. Neato!
 2021-06-24 22:27:02 -04:00
Thomas Harte
1a97cc8a91 Start making some effort towards audio generation. 2021-06-24 22:21:01 -04:00
Thomas Harte
c34a548fa0 Ensure character pixel reads can't go out of bounds. 2021-06-24 22:19:50 -04:00
Thomas Harte
d1b89392a2 Improve exposiiton. 2021-06-24 22:18:31 -04:00
Thomas Harte
ed734754e5 Adds a through route for IMG files. 2021-06-24 21:04:21 -04:00
Thomas Harte
520c3c9218 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.
 2021-06-24 20:59:04 -04:00
Thomas Harte
9230cf1726 Corrects bug when left_ or right_margin_ = 0. 2021-06-24 20:28:50 -04:00
Thomas Harte
6e616972a5 Better binds margin tests to window movements; simplifies line parameter addressing. 2021-06-24 18:55:15 -04:00
Thomas Harte
f98888824d Switches to an overt active/inactive state machine. 2021-06-24 18:34:21 -04:00
Thomas Harte
6c8b23e708 Alters 4bpp mapping; adds character mode 4bpp and 8bpp. 2021-06-23 19:35:47 -04:00
Thomas Harte
2c2bb3765f Withdraws the EPDOS option. 
At least for now; it's something to worry about later.
 2021-06-23 19:32:34 -04:00
Thomas Harte
0d165740ea Honours memory size request. 2021-06-22 21:48:55 -04:00
Thomas Harte
88f0f2b623 Adds to the macOS UI and wires through all Enterprise options. 2021-06-22 21:39:07 -04:00
Thomas Harte
0afa143375 Add missing include. 2021-06-22 21:31:46 -04:00
Thomas Harte
8319aca351 Correct syntax errors. 2021-06-22 20:50:03 -04:00
Thomas Harte
a66734883a Starts sketching out Dave. 2021-06-22 19:33:41 -04:00
Thomas Harte
d2ab0dd839 Adds a quick way to get the compiler to pick an integral type. 2021-06-22 19:33:29 -04:00
Thomas Harte
2574407afb Relocates MinIntTypeValue to Numeric. 2021-06-22 19:33:02 -04:00
Thomas Harte
83a54fd6d2 Use the FAT12 boot sector to determine geometry. 2021-06-22 06:54:17 -04:00
Thomas Harte
e062780968 Extends back to 128kb and stops halting on unrecognised ports. 2021-06-22 06:15:42 -04:00
Thomas Harte
3acd0be1f7 Copy and paste 2bpp character support. 2021-06-21 23:27:13 -04:00