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2815 Commits

Author SHA1 Message Date
Thomas Harte
61e5702520 Remove dead TODO. 2021-10-14 16:09:11 -07:00
Thomas Harte
b12c640807 Makes drives non-copyable. 
To avoid error in the future.
 2021-10-14 12:37:55 -07:00
Thomas Harte
9be23ecc34 Add end-of-Blit interrupt. 
Along with a slightly easier path for posting interrupts, in C++ compilation unit terms.
 2021-10-13 15:09:19 -07:00
Thomas Harte
eec068914e Slightly improve logging. 2021-10-11 18:05:57 -07:00
Thomas Harte
39b8285ba5 Trust the HRM on step bit, but catch rising edge. 2021-10-11 07:42:42 -07:00
Thomas Harte
7733fef3bd DSKLEN has to be written twice. 2021-10-11 06:16:01 -07:00
Thomas Harte
6acddfdb98 Add the sync match interrupt. 
Albeit that it doesn't yet unblock disk DMA.
 2021-10-11 03:37:56 -07:00
Thomas Harte
99492c2ec2 Further tweak logging. 2021-10-10 18:19:50 -07:00
Thomas Harte
846b505d27 Reduce logging; disk data probably isn't the immediate obstacle. 2021-10-10 13:04:10 -07:00
Thomas Harte
8d43b4a98d Expands Disk DMA access window. 2021-10-10 11:47:02 -07:00
Thomas Harte
9336ffe216 Take a stab at index-hole sync. 2021-10-09 08:01:02 -07:00
Thomas Harte
eb157f15f3 Adds index hole interrupt. 2021-10-09 04:08:59 -07:00
Thomas Harte
d6e2a3f425 Make a first attempt to spool into RAM. 2021-10-08 18:11:47 -07:00
Thomas Harte
b47ca13ed3 Push disk data onwards. 2021-10-08 17:18:11 -07:00
Thomas Harte
67546c4d6e Per the HRM, the index hole is connected to CIA B, potentially to raise an interrupt. 2021-10-08 17:12:37 -07:00
Thomas Harte
f72deb0a5c Correct RDY position. 2021-10-08 04:32:13 -07:00
Thomas Harte
616ccbb878 Correct ID bit placement, multiplex with motor state. 
The latter per my reading of http://www.primrosebank.net/computers/amiga/upgrades/amiga_upgrades_storage_fdis.htm
 2021-10-08 04:05:57 -07:00
Thomas Harte
5899af0038 Starts accumulating disk data. 2021-10-07 05:11:32 -07:00
Thomas Harte
33ff4f3b5c Eliminate drive copies. 2021-10-06 13:40:28 -07:00
Thomas Harte
20bad38d42 Add drive activity lights. 2021-10-06 04:54:40 -07:00
Thomas Harte
92a07398cd I think CHNG works the other way around. 2021-10-06 04:47:52 -07:00
Thomas Harte
e961d0b4a3 Switch RDY type. 2021-10-06 04:41:09 -07:00
Thomas Harte
2253ff656a Adds route for inserting disks. 2021-10-05 16:12:30 -07:00
Thomas Harte
18631399ad Attempts to clock the disk controller. 2021-10-05 15:38:56 -07:00
Thomas Harte
ad4afcdcd5 Switch stepping direction. 
Empirically, based on the actions of Kickstart, and assuming my confusion is because the relevant signal is active low.
 2021-10-05 15:23:48 -07:00
Thomas Harte
2cf5bcc5db Clarify logic somewhat. 2021-10-05 15:20:05 -07:00
Thomas Harte
1180ad7662 Disables a couple of now-trustworthy LOGs. 2021-10-05 06:51:47 -07:00
Thomas Harte
5463cd1ae3 Attempts to support stepping and head selection. 2021-10-05 06:36:17 -07:00
Thomas Harte
647ec770ce Implements motor latching, drive ID shift registers. 2021-10-05 05:12:01 -07:00
Thomas Harte
e47bec2e65 Switch CIA B ports over. 2021-10-05 03:38:11 -07:00
Thomas Harte
674941abdf Starts to add a disk controller. 2021-10-04 16:45:05 -07:00
Thomas Harte
b3f0ca39ed Adds some unused drives. 2021-10-04 08:12:13 -07:00
Thomas Harte
5ccb512883 Moves the CIAs into the Chipset class. 
This reflects the routing of interrupt signals for now, but also prepares for the addition of disk drives.
 2021-10-04 06:44:54 -07:00
Thomas Harte
da286d5ae8 Switch spaces to tabs. 2021-10-04 05:27:25 -07:00
Thomas Harte
a282a51673 Remove last of the direct printf'ing. 2021-09-30 02:42:59 -04:00
Thomas Harte
b7b13e20d1 Single column blits should use both masks. 2021-09-29 22:49:35 -04:00
Thomas Harte
402fa41bc0 Corrects initial error value. 2021-09-29 22:19:17 -04:00
Thomas Harte
0b9ebafc0f Flip bit deserialisation order. 2021-09-28 22:12:13 -04:00
Thomas Harte
140e24ef15 Grab further copy flags. 2021-09-28 22:11:58 -04:00
Thomas Harte
ffcd2ea10c Attempts more properly to implement line mode. 2021-09-28 21:39:09 -04:00
Thomas Harte
cb460de94d Makes bad first attempt at a Bresenham inner loop. 2021-09-27 22:06:00 -04:00
Thomas Harte
f6624bf776 Edges mildly closer to line output. 2021-09-26 19:18:12 -04:00
Thomas Harte
b4b6c4d86f Attempts to support left and right masks. 2021-09-26 18:42:08 -04:00
Thomas Harte
759689ff31 Fix line mode flag, add busy status. 2021-09-26 18:16:00 -04:00
Thomas Harte
9012a7f5e1 Merge branch 'master' into Amiga 2021-09-23 23:00:03 -04:00
Thomas Harte
e5a5faa417 Resolves Clang 13 implicit conversion warnings. 2021-09-23 22:53:41 -04:00
Thomas Harte
c4ab2bbeed Hard-code fetch window width. For now. 2021-09-23 22:06:13 -04:00
Thomas Harte
42ef459e20 Resolve resting values. 2021-09-23 22:05:59 -04:00
Thomas Harte
cad1a9e0f1 Correct bit test. 2021-09-23 20:42:31 -04:00
Thomas Harte
f1d514470d Add note to future self. 2021-09-23 20:29:39 -04:00
Thomas Harte
9a7a54f22f Take alternative guess as to meaning of 'use' bits. 2021-09-23 18:42:12 -04:00
Thomas Harte
137d1c61bd Allow for channel enables and blitting direction. 2021-09-23 18:38:37 -04:00
Thomas Harte
adc071ed7a Fix: modulos are 15-bit signed, the minterms are also in regular BLTCON0. 2021-09-23 18:30:35 -04:00
Thomas Harte
e06f470044 Ensure no implicit conversion from int to IntT. 2021-09-23 18:30:04 -04:00
Thomas Harte
ab69fe56c9 Take a first shot at magical instant blitting. 2021-09-23 18:13:51 -04:00
Thomas Harte
60bad22a91 Correct fetch window. 2021-09-23 18:13:24 -04:00
Thomas Harte
7092429f7c Added some notes to self on line mode. 2021-09-20 23:08:26 -04:00
Thomas Harte
fa800bb809 Introduces code for minterm application. 2021-09-20 19:13:23 -04:00
Thomas Harte
e15f1103a0 Takes a shot at low resolution shifting. 2021-09-20 19:00:52 -04:00
Thomas Harte
a4263b5a8c Ties bitplane collection to line position. 
Outgoing bug: incrementing the video relative offset too often, due to cycles that are discovered to be CPU-targetted.
 2021-09-19 21:55:45 -04:00
Thomas Harte
245b7baa61 Moves the Copper into its own file. 2021-09-16 21:17:23 -04:00
Thomas Harte
0eeaaa150a Correct Copper start address. 2021-09-16 21:01:37 -04:00
Thomas Harte
692d87f446 Attempts to restrict blitter slot allocation. 2021-09-16 19:56:28 -04:00
Thomas Harte
6572efe2a7 Clarifies word addressing. 2021-09-16 08:24:52 -04:00
Thomas Harte
8aac2bd029 Stubs in serial port status. 2021-09-14 21:53:07 -04:00
Thomas Harte
add11db369 Factors out DMADevice, which is now a parent of Blitter. 2021-09-14 20:51:32 -04:00
Thomas Harte
e47eab1d40 Merge branch 'master' into Amiga 2021-09-14 20:27:59 -04:00
Thomas Harte
fa71ae3174 Add apology. 2021-09-14 20:23:36 -04:00
Thomas Harte
dfcd1508c9 Establishes valid initial BRAM. 2021-09-10 19:56:20 -04:00
Thomas Harte
7e5fc4444a Default to ROM01. 2021-09-09 22:09:09 -04:00
Thomas Harte
d8e42c4379 Tweak guess at initial state. 2021-09-09 22:06:36 -04:00
Thomas Harte
dd37fa49a0 Stabilises Apple IIgs display. 2021-09-09 20:08:15 -04:00
Thomas Harte
fd70f7ad43 Attempts to make pixel content observeable. 2021-09-08 20:57:26 -04:00
Thomas Harte
6e034c9b7f At least manages to place a pixel region on screen. 
Albeit that I've suddenly realised that I've failed properly to think about high-res versus low-res.
 2021-08-11 20:31:37 -04:00
Thomas Harte
52e375a985 Move towards playfield decoding. 2021-08-11 18:47:35 -04:00
Thomas Harte
10a5e7313f Makes a buggy first attempt at bitplane data collection. 2021-08-10 21:28:48 -04:00
Thomas Harte
ec9cb21fae Starts towards bitplane collection. 2021-08-10 19:01:41 -04:00
Thomas Harte
fdd02ad6a6 Neaten, slightly. 2021-08-10 09:20:34 -04:00
Thomas Harte
76e9fcc94a Obey blitter DMA-enable mask. 2021-08-10 09:19:15 -04:00
Thomas Harte
e412927415 Logs a bit more from the Blitter, gives it access to slots. 2021-08-10 07:17:01 -04:00
Thomas Harte
dda154c7c6 Adds nonsense disk reads, which seems to lead to bitplane and blitter requests. 
Progress, at last!
 2021-08-09 20:31:14 -04:00
Thomas Harte
9215535bee Adds a container for the disk controller. 
Thereby appears to prove that my Amiga is getting as far as attempting to load from floppy.
 2021-08-09 17:35:09 -04:00
Thomas Harte
86c6248b48 Merge branch 'master' into Amiga 2021-08-09 17:09:04 -04:00
Thomas Harte
1502c4530e Takes a further step towards real timing. 2021-08-08 21:52:28 -04:00
Thomas Harte
c1df4d1c0b Mirroring is correct. 2021-08-08 20:20:12 -04:00
Thomas Harte
7f2610c4fc Disambiguates serial control logs. 2021-08-07 16:57:30 -04:00
Thomas Harte
b11dd6950c Adds an entry for DiagROM. 2021-08-07 16:56:18 -04:00
Thomas Harte
db3c158215 Further increases logging. 2021-08-05 20:07:14 -04:00
Thomas Harte
25e2bd307a Sets VPA for CIA accesses; logs a little more. 2021-08-05 20:06:48 -04:00
Adam Smith
fdb676da4e . 2021-08-01 00:26:14 -07:00
Thomas Harte
1bae4973bc Post the serial control write onwards. 2021-07-30 18:24:27 -04:00
Thomas Harte
3d9f86c584 Begins keyboard sketches and notes. 2021-07-30 18:23:15 -04:00
Thomas Harte
3514e537ca Minor logging tweaks. 2021-07-30 18:22:59 -04:00
Thomas Harte
b78090ec76 Fixes IOPortsAndTimers classification. 2021-07-28 19:39:42 -04:00
Thomas Harte
759007ffc1 Attempts to route CIA interrupts. 2021-07-28 19:36:30 -04:00
Thomas Harte
69ae9d72c8 Remove dead non-access. 2021-07-27 22:27:20 -04:00
Thomas Harte
604232acd9 Establish appropriate word-size mask. 2021-07-27 22:23:38 -04:00
Thomas Harte
82205d71cc Breaks up loop for arithmetic simplicity. 2021-07-27 21:59:27 -04:00
Thomas Harte
402eab10f8 Breaks video output while attempting to pull it into the main loop. 2021-07-27 21:33:07 -04:00
Thomas Harte
b6bf4d73ad Blitter-finished bit aside, attempts to complete the Copper. 2021-07-27 21:10:14 -04:00
Thomas Harte
5425b5c423 Adds some form of WAITing to the Copper. 2021-07-27 19:32:55 -04:00
Thomas Harte
29cd8504ca Implements enough Copper to get a first store. 2021-07-27 19:06:16 -04:00
Thomas Harte
3544746934 Modifies interface, starts on scheduler. 
Probably corrects the pixel clock, which I think was scaled up by a factor of 4.
 2021-07-27 16:41:18 -04:00
Thomas Harte
d8f814f1c4 If I'm going to push only a single colour, might as well make it fast. 2021-07-26 21:19:43 -04:00
Thomas Harte
a43175125a Assuming I'm going to keep this synchronous, extends function signature. 2021-07-26 20:13:06 -04:00
Thomas Harte
1d03bc560a Stores the colour palette, uses entry 0 as my new always output. 2021-07-26 18:59:11 -04:00
Thomas Harte
3832acf6e3 Produces a static white box, at least. 2021-07-26 18:51:01 -04:00
Thomas Harte
7894b50321 Starts towards an actual pixel output loop. 2021-07-26 18:44:20 -04:00
Thomas Harte
ffded619e6 Returns track 0 found, as a guess. 2021-07-26 18:44:01 -04:00
Thomas Harte
bcb7bb5cce Improves logging further. 
To investigate the new perpetual loop.
 2021-07-26 17:02:30 -04:00
Thomas Harte
87dcd82f69 Makes a first attempt at some sort of interrupt functionality. 2021-07-26 16:40:42 -04:00
Thomas Harte
e671cc6056 Add stubs for joystick/mouse querying. 2021-07-26 16:21:51 -04:00
Thomas Harte
5da89b88a6 Add missing space. 2021-07-25 22:17:55 -04:00
Thomas Harte
5d60c1f20b Stubs in Paula. 2021-07-25 22:16:31 -04:00
Thomas Harte
7fd00165c9 Switch to [hard-coded] PAL, for now. 
In the hope that I get to see some graphics soon, this should better conform to my expectations.
 2021-07-25 20:41:51 -04:00
Thomas Harte
20da194fab Log slightly more accurately. 2021-07-25 19:59:24 -04:00
Thomas Harte
e3bb9fc1d7 Increase logging. 2021-07-23 23:10:00 -04:00
Thomas Harte
d898a43dff Implements time-of-day counters, provisionally. 
Interrupts to do.
 2021-07-23 21:24:07 -04:00
Thomas Harte
86c30769d9 Add a divide-by-ten for the CIAs. 2021-07-23 19:25:53 -04:00
Thomas Harte
956a6dbd64 Improve commentary. 2021-07-23 19:23:54 -04:00
Thomas Harte
de208ead4e Stubs in enough to get back into a persistent loop. 2021-07-22 22:00:53 -04:00
Thomas Harte
87d2fc1491 Adds enough raster position to return something. 2021-07-22 21:45:51 -04:00
Thomas Harte
2bc9af09e1 Factors out the chipset. 2021-07-22 21:16:23 -04:00
Thomas Harte
d1ac54fe92 Stubs in sprite containers. 2021-07-22 19:00:26 -04:00
Thomas Harte
9468adf737 Stubs in Copper addresses. 2021-07-22 18:51:23 -04:00
Thomas Harte
e85db40b0f Sketches out a blitter class. 2021-07-22 18:43:07 -04:00
Thomas Harte
b3d55cc16d Adds non-committal reads for some write-only registers. 
The hardware now proceeds to trying to talk to the Blitter. So that's next.
 2021-07-22 16:10:30 -04:00
Thomas Harte
3ee1fc544f Fix: (1) memory base adjustment; (2) out-of-bounds writes. 2021-07-21 21:49:20 -04:00
Thomas Harte
ba2e5a97a9 Provisionally adds a status LED. 2021-07-19 22:31:36 -04:00
Thomas Harte
4515d1220c Switches CIA A/B byte connections; applies reset to memory map. 2021-07-19 22:17:40 -04:00
Thomas Harte
486959bce8 With minor additional logging, it appears the Amiga just keeps resetting itself. 2021-07-19 21:50:35 -04:00
Thomas Harte
e1a410bf3d Further mildly increases logging. 2021-07-19 20:54:32 -04:00
Thomas Harte
3767cc7c0b Increase logging; fix set/clear of interrupt enable mask. 2021-07-19 19:03:37 -04:00
Thomas Harte
96b0ce9ef2 Merge branch 'master' into Amiga 2021-07-18 22:16:05 -04:00
Thomas Harte
cfaf4a8a65 Add advised brackets; clarify type punning. 2021-07-18 22:11:11 -04:00
Thomas Harte
22dd8a8847 Stubs onward to a second endless loop. 2021-07-18 20:55:33 -04:00
Thomas Harte
3e2bac8129 Stubs in enough to get to a permanent loop. 2021-07-18 20:25:43 -04:00
Thomas Harte
c425dec4d5 Makes some attempt to get as far as the overlay being disabled. 2021-07-18 17:17:41 -04:00
Thomas Harte
622cca0acf Adds sufficient address decoding to print a more helpful exit message. 2021-07-18 12:13:56 -04:00
Thomas Harte
48999c03a5 Adds concept of time, captured port handler. 2021-07-18 11:49:10 -04:00
Thomas Harte
b1616be4b8 Gets to what is probably a CIA access? 2021-07-17 21:36:20 -04:00
Thomas Harte
a0a9a72d8f Begins sketching out a memory mapper. 2021-07-17 21:10:06 -04:00
Thomas Harte
f7de6f790c Meanders vaguely towards a memory map. 2021-07-16 21:42:17 -04:00
Thomas Harte
d1f3b5ed80 Obtains a Kickstart ROM, adds a 68000. 2021-07-16 21:07:12 -04:00
Thomas Harte
7925dcc5a2 Advances far enough for the Amiga to be autonomous. 2021-07-16 20:49:12 -04:00
Thomas Harte
6ade36bf09 Adds an empty shell of a machine. 2021-07-16 20:30:48 -04:00
Thomas Harte
5bfedff8d1 Mutate dangling printf to a LOG. 2021-07-16 17:32:05 -04:00
Thomas Harte
b41e29a83b Slows CPC typer to avoid dropped characters. 2021-07-15 21:54:02 -04:00
Thomas Harte
52ea3b741c Introduces a presentation flag for LEDs. 
All existing receivers ignore it.
 2021-07-15 21:26:02 -04:00
Thomas Harte
af1ade9433 Introduces Amiga ROMs to the catalogue. 2021-07-15 21:09:20 -04:00
Thomas Harte
a4c011e3c0 Flip meaning of INT1 input read. 2021-07-09 22:39:51 -04:00
Thomas Harte
6225abd751 Adds 6MHz Enterprise option. 2021-07-07 20:57:04 -04:00
Thomas Harte
0e49258546 Remove caveman debugging. 2021-07-06 23:15:53 -04:00
Thomas Harte
264b8dfb28 Dave: apply ring modulation even in sync mode. 2021-07-06 23:11:30 -04:00
Thomas Harte
5167d256cc Remove detritus. 2021-07-06 22:43:17 -04:00
Thomas Harte
16bd826491 Reduce nesting. 2021-07-06 22:32:59 -04:00
Thomas Harte
55af8fa5d9 Avoid erroneous Nick delays. 2021-07-06 22:28:44 -04:00
Thomas Harte
1ec8ff20af Ensure data bus is 0xff during interrupts. 2021-07-06 21:58:17 -04:00
Thomas Harte
7a673a2448 Avoid confusing temporary storage. 2021-07-06 20:23:09 -04:00
Thomas Harte
33e2a4b21c Minor cleanups. 2021-07-06 20:20:13 -04:00
Thomas Harte
3e6b804896 Switches to linked 1/50/1000 Hz timers, and per-interrupt state toggling. 2021-07-06 20:12:44 -04:00
Thomas Harte
c20e8f4062 Honours 8/12Mhz selection in non-video delays. 2021-07-03 23:05:09 -04:00
Thomas Harte
4add48cffb Obey Dave's 8/12MHz programmable divider. 2021-07-03 22:43:20 -04:00
Thomas Harte
43ceca8711 Use type alias. 2021-07-03 19:10:39 -04:00
Thomas Harte
3ef28a4f03 Remove unused instance variable. 2021-07-03 19:10:29 -04:00
Thomas Harte
5715c9183f The target is now definitely used. 2021-07-03 15:20:37 -04:00
Thomas Harte
196651d9aa Consolidates TODO. 2021-07-03 13:08:53 -04:00
Thomas Harte
6b46212a4e Deal with dangling TODO. 2021-07-03 13:07:41 -04:00
Thomas Harte
2a6fff2008 Takes a stab at what might happen if you read from Nick. 2021-07-03 13:06:07 -04:00
Thomas Harte
c5944efe50 Adds various method definitions. 2021-07-03 12:56:56 -04:00
Thomas Harte
f384370b18 Switch what's left of Enterprise logging to actual LOGs. 2021-07-03 12:50:46 -04:00
Thomas Harte
278671cdb9 Correct Nick interrupt prediction. 2021-07-03 00:05:13 -04:00
Thomas Harte
964d2d4fa4 Be consistent in expression of logic. 2021-07-03 00:00:00 -04:00
Thomas Harte
283092cfbc With a unit test in aid, corrects some lingering TimedInterruptSource issues. 2021-07-02 23:41:19 -04:00
Thomas Harte
614953a222 Allows the low-pass filter to react to high-pass effects. 2021-07-02 22:36:35 -04:00
Thomas Harte
4fffb3cf19 Allow that final Z80 cycle to start anywhere in the first three of Nick's window of six. 2021-07-02 22:29:35 -04:00
Thomas Harte
d715e5fd1d Expose composite/RGB option in Qt. 2021-07-02 21:51:48 -04:00
Thomas Harte
7826a26c7b Adds Enterprise composite video option. 
While enabling more pixels on the left for RGB mode.
 2021-07-02 21:42:09 -04:00
Thomas Harte
763b9ba0ec Ensure the splash screen is skipped for self-booting disks. 2021-07-02 21:11:54 -04:00
Thomas Harte
51d98ef9ab Add missing stddef header where size_t is used. 2021-07-01 23:15:32 -04:00
Thomas Harte
742d44a532 Switch to an activity-based typing trigger; add a target loading command. 2021-07-01 22:53:23 -04:00
Thomas Harte
52b96db2b9 Correct syntax, mapping and inter-key timing. 2021-07-01 21:18:15 -04:00
Thomas Harte
0b9de78c38 Add typer support for the Enterprise. 2021-07-01 21:05:03 -04:00
Thomas Harte
1c424833a9 Correct EXDOS ROM name. 2021-06-29 21:04:53 -04:00
Thomas Harte
3d8fc9952d Remove dead TODO, correct for overflow position. 2021-06-29 15:44:02 -04:00
Thomas Harte
8ce8fbd977 Provide correct input when one of the tone generators is the interrupt source. 2021-06-29 15:41:08 -04:00
Thomas Harte
7f08218b28 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.
 2021-06-28 22:10:11 -04:00
Thomas Harte
2c139ad931 Adds some notes to self. 
I think I'm starting to find enough information to handle tapes.
 2021-06-28 22:03:06 -04:00
Thomas Harte
1119779c8b Ensure EXDOS card is completely disabled if no FDC is present. 2021-06-28 21:47:53 -04:00
Thomas Harte
5351ac560f Ensure the motor goes off for unselected drives. 2021-06-28 21:40:12 -04:00
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
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
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
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
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
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
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
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
Thomas Harte
c1678d7be7 Corrects exposition and transmission of drive selection. 
What a klutz I've been.
 2021-06-21 22:56:25 -04:00
Thomas Harte
117f9a9794 Adds notes on intended meaning of status register. 2021-06-21 07:31:58 -04:00
Thomas Harte
b49cc407c6 Adds some guesses as to the EXDos expansion. 
... with plenty left to do.
 2021-06-20 22:30:27 -04:00
Thomas Harte
954386f1cc Creates a shell for the disk-drive add-on card. 2021-06-20 20:50:23 -04:00
Thomas Harte
d7ff6bd04d Adds necessary declarations to install a DOS ROM. 2021-06-20 20:30:54 -04:00
Thomas Harte
6025516f9f Ensure addresses increment even when there's no target for pixels. 2021-06-20 14:31:02 -04:00
Thomas Harte
d8b9cdf7a2 Correct multiplier. 2021-06-20 14:25:37 -04:00
Thomas Harte
09dbff39f2 Also map keypad to F keys. 
This is a pragmatic and arguably Apple-centric decision. But also it's fairly arbitrary, as the Enterprise doesn't have a number pad.
 2021-06-20 14:25:28 -04:00
Thomas Harte
2fe15a6168 Switch to idealised Nick clock rate. 2021-06-20 14:21:56 -04:00
Thomas Harte
07dc26f8fa Adds TODO to resolve screen jumping. 2021-06-19 23:41:29 -04:00
Thomas Harte
0e1e8c7faa Attempts to support the panoply of EXOS and BASIC versions. 2021-06-19 22:59:09 -04:00
Thomas Harte
42a98e1676 Fix composition with empty nodes. 2021-06-19 22:13:17 -04:00
Thomas Harte
23e26e0333 Attempts to complete handling of VRES. 2021-06-19 22:00:19 -04:00
Thomas Harte
fadb04f3f3 Attempts to implement LSBALT and MSBALT. 2021-06-19 21:57:26 -04:00
Thomas Harte
4968ccf46d Corrects attributed mode. 2021-06-19 13:08:14 -04:00
Thomas Harte
1dcac304d3 Implements the ALTIND bits and attempts ATTR mode. 2021-06-19 13:04:18 -04:00
Thomas Harte
1651efe4fc Ensures all keys are initially unpressed. 2021-06-19 13:03:31 -04:00
Thomas Harte
8f24aed43e Slightly reduces logging. 2021-06-18 23:17:44 -04:00
Thomas Harte
a381374e31 Drops back down to 64kb. 2021-06-18 23:14:44 -04:00
Thomas Harte
9411c37d23 Fleshes out the keyboard map. 2021-06-18 23:14:35 -04:00
Thomas Harte
6af6f21868 Attempts to implement interrupt latches and clears. 2021-06-18 22:59:41 -04:00
Thomas Harte
9a0022cfcb Removes temporary work. 2021-06-18 18:44:07 -04:00