Thomas Harte
475440dc70
Update ClockConverter for potential alternative clocks.
2023-01-02 14:59:36 -05:00
Thomas Harte
dc3f8f5e42
These are the three fetchers to implement.
...
They'll look fairly different from the TMS and SMS fetchers, I think, owing to the greater irregularity that comes with the smarter RAM accesses. I might need to play around for a while.
2023-01-01 22:44:06 -05:00
Thomas Harte
459ef39b08
constexpr
the TMS palette.
2023-01-01 22:34:07 -05:00
Thomas Harte
27812fd0e2
Separate fetchers into their own header.
2023-01-01 22:26:50 -05:00
Thomas Harte
38eb4d36de
Better explain cumulative nature of @c to_internal.
2023-01-01 22:18:39 -05:00
Thomas Harte
2bd20a0cf8
Add further exposition.
2023-01-01 22:17:21 -05:00
Thomas Harte
da61909ec5
Explain the purpose here.
2023-01-01 21:20:30 -05:00
Thomas Harte
5729ece7bb
Incompletely transitions towards more flexible clock ratios.
2023-01-01 14:20:45 -05:00
Thomas Harte
151f60958e
Relocate the 9918 implementation file.
2023-01-01 14:01:19 -05:00
Thomas Harte
180045ada6
Convert vram_access_delay
into a free-standing function.
2023-01-01 13:51:52 -05:00
Thomas Harte
11542e7a7f
Improve const correctness, simplify inheritance.
2023-01-01 13:49:11 -05:00
Thomas Harte
71598250ea
Improve commentary.
2023-01-01 13:41:51 -05:00
Thomas Harte
ffb0b2ce0b
Eliminate runtime duplication of personality.
2022-12-31 21:50:57 -05:00
Thomas Harte
b7c315058f
Also template Base
.
2022-12-31 21:47:05 -05:00
Thomas Harte
7d6eac2895
Template the TMS on its personality.
...
Template parameter currently unused, but preparatory to other improvements.
2022-12-31 15:08:33 -05:00
Thomas Harte
d79aac3081
Shuffle the personality enum into the 'public' header.
2022-12-31 15:01:11 -05:00
Thomas Harte
8d5547dc9e
Minor further style improvements.
...
... as I refamiliarise myself.
2022-12-29 22:09:14 -05:00
Thomas Harte
5d89293c92
Improve const
ness, primarily of reverse_table
.
2022-12-29 11:29:19 -05:00
Thomas Harte
711f7b2d75
C++17 makes this a single step.
2022-12-27 22:50:12 -05:00
Thomas Harte
dca8c51384
Prefer to avoid a macro.
2022-12-27 22:36:27 -05:00
Thomas Harte
462b7dcbfa
Add Mega Drive VRAM size.
2022-12-27 22:28:43 -05:00
Thomas Harte
2ab4b351ca
Extend enum.
2022-12-27 22:20:47 -05:00
Thomas Harte
99ced5476f
Add quick clock-rate notes.
2022-12-26 22:56:45 -05:00
Thomas Harte
1d5144b912
Correct no-interrupt signal.
2021-06-04 22:38:07 -04:00
Thomas Harte
1266bbb224
Makes the TMS a sequence-point-generating JustInTimeActor.
2021-04-05 21:02:37 -04:00
Thomas Harte
650b9a139b
Tweak Master System blue scale.
2021-03-19 08:38:21 -04:00
Thomas Harte
a17d0e428f
Protects against some further uninitialised values.
2020-09-16 18:15:57 -04:00
Thomas Harte
3cb1072c29
Adds an explicit [[fallthrough]] tag.
2020-06-19 23:10:25 -04:00
Thomas Harte
267006782f
Starts to add Qt target; resolves many build warnings.
2020-05-30 00:37:06 -04:00
Thomas Harte
512a52e88d
Increases const correctness, marks some additional constructors as constexpr, switches std::atomic construction style.
2020-05-20 23:34:26 -04:00
Thomas Harte
66c2eb0414
Further tightens const
and constexpr
usage.
2020-05-12 22:22:21 -04:00
Thomas Harte
25996ce180
Further doubles down on construction syntax for type conversions.
2020-05-09 23:00:39 -04:00
Thomas Harte
a7e1920597
Restores ColecoVision runtime options.
2020-03-18 00:06:52 -04:00
Thomas Harte
9d97a294a7
Corrects the TMS' get_scaled_scan_status
.
...
I think all platforms are now returning credible numbers.
2020-01-22 19:34:10 -05:00
Thomas Harte
a71c5946f0
Ensures proper manipulation of scan_statuses, leading to the correct result out of a CRTMachine.
...
Possibly with the exception of the TMS, as I appear to have uncovered an unrelated issue there.
2020-01-21 22:28:25 -05:00
Thomas Harte
d97a073d1b
Adds the necessary routine for all machines to be able to respond to get_scan_status.
...
They all just as the CRT, as all are currently based on the CRT. Which doesn't currently know the total clock rate it would need to in order properly to scale the answer to the question. Further thought coming.
2020-01-20 21:45:10 -05:00
Thomas Harte
c1bae49a92
Standardises on read
and write
for bus accesses.
...
Logic being: name these things for the bus action they model, not the effect they have.
2020-01-05 13:40:02 -05:00
Thomas Harte
274867579b
Deploys constexpr
as a stricter const
.
2019-12-22 00:22:17 -05:00
Thomas Harte
a847654ef2
Corrects various old-fashioned bits of indentation, plus the odd const.
2019-12-22 00:00:23 -05:00
Thomas Harte
1c154131f9
Expands size of storage in Cycles/HalfCycles; adjusts widely to compensate.
2019-10-29 22:36:29 -04:00
Thomas Harte
929475d31e
Minor correction: round down, not up.
2019-09-28 23:49:32 -04:00
Thomas Harte
d97348dd38
Eliminates dangling uses of printf
.
2019-03-02 18:07:05 -05:00
Thomas Harte
601961deeb
Wires through set_display_type
.
2018-11-29 20:44:21 -08:00
Thomas Harte
64465f97b6
Starts towards reintroducing the proper mechanisms for selecting a display type at runtime.
2018-11-28 17:53:33 -08:00
Thomas Harte
5618288459
Reduces visible area, producing a tighter crop.
2018-11-25 22:32:12 -05:00
Thomas Harte
ee89be6730
Removes many stray spaces.
2018-11-23 22:32:32 -05:00
Thomas Harte
770d7e90e9
Removes stale sampling functions.
2018-11-22 22:47:29 -05:00
Thomas Harte
c5d9bf2c12
Optimises slightly for black borders.
...
Specifically to help to debug proper display of unused lines in the new scan target.
2018-11-17 18:23:42 -05:00
Thomas Harte
15b1176841
Ensures no border output if space is not allocated.
2018-11-14 22:32:33 -05:00
Thomas Harte
9dff13cbbf
Re-establishes output from the machines with 9918s and derivatives.
2018-11-14 22:25:19 -05:00
Thomas Harte
6d277fecd5
Makes ScanTarget
a little more communicative and orthogonal.
2018-11-10 19:52:57 -05:00
Thomas Harte
f6562de325
Possibly adds enough for the Electron and ZX80 to start outputting dummy lines.
...
Let's see!
2018-11-03 23:40:39 -04:00
Thomas Harte
b40211d2c0
Starts to bend 'CRTMachine' to a world farther from owning the GPU relationship.
2018-11-03 21:54:25 -04:00
Thomas Harte
da4d883321
Adds first, incomplete attempts to talk to a ScanTarget from the CRT.
...
Does away with the hassle of `unsigned` while I'm here; that was a schoolboy error.
2018-11-03 19:58:44 -04:00
Thomas Harte
f65d80b7d1
Ensures offset and flags are initialised to 0.
...
This prevents a potential crash at startup.
2018-10-29 22:09:32 -04:00
Thomas Harte
8652d8b23d
(Mostly) randomises the 9918 start position.
2018-10-26 21:02:56 -04:00
Thomas Harte
e02aa885d8
Testing against the ColecoVision suggests this is probably always 7.
2018-10-26 20:59:12 -04:00
Thomas Harte
bb09762029
Introduces extra delays to VRAM access.
2018-10-26 20:19:08 -04:00
Thomas Harte
05a5c7120e
Shunts CRAM dots into their proper place.
2018-10-26 20:06:51 -04:00
Thomas Harte
521d603902
Adds a first attempt at CRAM dot output. With a TODO.
2018-10-26 19:26:46 -04:00
Thomas Harte
916710353a
Makes it explicit that I want the reference.
2018-10-25 23:18:34 -04:00
Thomas Harte
53b00dea3f
Adds missing include.
2018-10-25 23:12:41 -04:00
Thomas Harte
0587b9f257
Edges to within millimetres of CRAM dots.
...
... but all the way up to bedtime.
2018-10-25 23:12:03 -04:00
Thomas Harte
5accd8cf08
Fixes broken implementation of 9918 multicolour mode.
2018-10-24 22:40:38 -04:00
Thomas Harte
a8645f80bf
Introduces 'non-exclusive' emulator-space keyboards.
...
i.e. sets of keys that don't amount to an entire keyboard in the modern sense. Experimentally used by the Master System for its reset key.
2018-10-24 21:59:30 -04:00
Thomas Harte
d61c3a9442
Fixes sprite list termination in 224- and 240-line modes.
2018-10-24 19:53:46 -04:00
Thomas Harte
2cdeaa2575
Moves misplaced bracket.
2018-10-23 22:37:19 -04:00
Thomas Harte
286783e880
Accepts GCC's suggestion of extra clarity brackets.
2018-10-23 22:36:23 -04:00
Thomas Harte
00e7958a97
Separates request for an SMS2 VDP from current graphics mode.
...
Thereby fixes various minor segments of Codemasters games.
2018-10-23 22:19:45 -04:00
Thomas Harte
2f995eb622
Adjusts vertical timing for display height.
2018-10-23 21:20:44 -04:00
Thomas Harte
90fbad0f1c
Implements SMS2-style addressing if in a 224 or 240-line mode.
...
This isn't quite accurate, but it'll do for development.
2018-10-23 20:30:08 -04:00
Thomas Harte
2cbd28478d
Allows the sprite terminator to be specified.
2018-10-23 20:01:47 -04:00
Thomas Harte
7855145ebd
Slightly adjusts pixel output time.
...
i.e. respective to reading; sprite collision times now seem correct.
2018-10-22 19:58:33 -04:00
Thomas Harte
883680731a
Uses explicit state to determine whether a pixel target has been requested.
2018-10-21 21:18:41 -04:00
Thomas Harte
c07f9fed99
Corrects test and implementation to pass the exhaustive VDP interrupt prediction test.
2018-10-21 18:42:49 -04:00
Thomas Harte
16f08eb654
Slightly tweaks Master System timing numbers.
2018-10-21 13:58:34 -04:00
Thomas Harte
30b99f0049
Fixes a couple of interrupt prediction errors.
2018-10-20 18:25:28 -04:00
Thomas Harte
b61de65b43
Restores proper phase with the CPU.
2018-10-19 23:18:16 -04:00
Thomas Harte
0822c96ce0
Implements the proper row counter values for > 192 row modes.
2018-10-19 22:37:56 -04:00
Thomas Harte
f9a6c00493
Makes first attempt to support PAL timings.
2018-10-19 21:36:13 -04:00
Thomas Harte
4cd65eab5c
Seeks to avoid bad macro expansion.
2018-10-18 22:36:25 -04:00
Thomas Harte
9bc09046c0
Attempts to ensure that sprites can go off the top of the screen.
2018-10-18 21:48:57 -04:00
Thomas Harte
512f085891
Ensures proper left clipping of sprites.
2018-10-18 21:14:16 -04:00
Thomas Harte
da00c832f5
Corrects colour fetching for multicolour text mode.
2018-10-18 20:38:00 -04:00
Thomas Harte
8ff265c3a1
Corrects multicolour text mode.
2018-10-18 20:25:42 -04:00
Thomas Harte
1fc88c4eff
Corrects off-by-one error in line fetching coroutines.
2018-10-16 21:36:31 -04:00
Thomas Harte
58ca74c68a
Resolves right-side TMS sprite droppages.
2018-10-16 21:25:08 -04:00
Thomas Harte
b4f871a2ef
Corrects first line sprite row selection.
2018-10-16 21:16:29 -04:00
Thomas Harte
0f7bf6d6c6
Resolves attempt to output graphics on the line one before the display.
2018-10-16 21:02:31 -04:00
Thomas Harte
5dfe7d8596
Corrects most of TMS sprite drawing.
2018-10-16 20:49:04 -04:00
Thomas Harte
231009b901
Makes faulty attempt to reintroduce TMS-mode sprites.
2018-10-16 20:00:06 -04:00
Thomas Harte
1c5f939aea
Reintroduces tiles and some element of sprites in regular TMS mode.
2018-10-14 21:52:13 -04:00
Thomas Harte
c1e6406fc9
Corrects sprite accumulation.
2018-10-14 19:56:09 -04:00
Thomas Harte
d66979c68f
Switched to a very large number of buffers, and resolved stupid attempt to reassign a reference.
2018-10-14 18:19:11 -04:00
Thomas Harte
6c09abc6cb
Makes a flawed attempt to reformulate this exactly as two separate processes on a common clock with an interchange buffer.
...
Specifically because closer inspection of the TMS modes shows it isn't quite valid to model output of one line as having fully completed prior to fetching of the next. So some sort of extra buffer is required. At which point it is most natural to continue with the logic that each fetch routine is oriented around the fetching process for a single line, and each output routine has the same view, suggesting separate read/write addresses.
Something is wrong though, as video data is being output too rapidly (I think) and with occasional sync issues (again: subject to investigation).
2018-10-14 16:23:45 -04:00
Thomas Harte
9e52ead09a
Ensures sprite scanning doesn't improperly set collision flag; that slot 151 is filled.
2018-10-12 19:50:48 -04:00
Thomas Harte
9ab0c54426
Eliminates faulty attempt to satisfy SMSVDP vertical counter test.
2018-10-12 18:57:07 -04:00
Thomas Harte
f6af6778ab
Moves scrolling latch to proper position and implements 4-window fetching offset.
2018-10-11 22:36:27 -04:00
Thomas Harte
6a94dda60d
Selects potentially-correct interrupt times.
2018-10-11 21:42:09 -04:00
Thomas Harte
82b7944599
Fixes horizontal counter wrapping.
2018-10-11 20:37:29 -04:00
Thomas Harte
52e02db5c8
Introduces horizontal counter latching and reading.
...
Then makes a new guess at frame IRQ position. But gets it wrong. Hmmm.
2018-10-11 19:56:32 -04:00
Thomas Harte
9a933993f5
Added TODO.
2018-10-10 22:17:17 -04:00
Thomas Harte
062b2ae8d3
Corrects calculation of [NTSC, 192 line] current row.
2018-10-10 22:15:38 -04:00
Thomas Harte
9f69dbf31a
Adds half-updating of RAM pointer.
...
This emulator now passes the first screen of the SMS VDP test.
2018-10-10 21:59:08 -04:00
Thomas Harte
63fb3f03d1
Corrects address loading upon accesses of registers other than 0.
2018-10-10 21:47:48 -04:00
Thomas Harte
2e379b0834
Adds latching of scroll values.
2018-10-10 21:28:18 -04:00
Thomas Harte
f00f6c8c23
Allows the frame interrupt to be placed anywhere in the frame.
2018-10-10 21:07:39 -04:00
Thomas Harte
50e23f4a2e
Fixes 16px-high sprites.
2018-10-10 20:34:00 -04:00
Thomas Harte
acdc84e08c
Improves test slightly, and fixes line interrupt reload value setting.
2018-10-09 22:14:35 -04:00
Thomas Harte
c128ddb549
Introduces a first unit test for line interrupts and corrects backup behaviour.
2018-10-09 21:49:21 -04:00
Thomas Harte
dccf17e770
Makes a first serious attempt at Master System line interrupts.
2018-10-09 20:51:09 -04:00
Thomas Harte
2d8ab72e22
Fixed proper starting position for (interrupted) tile drawing.
2018-10-08 23:13:37 -04:00
Thomas Harte
748366c70e
Corrects buffer overrun when the horizontal scroll lock is on.
2018-10-08 23:06:22 -04:00
Thomas Harte
7a74fe2ff7
Corrects tile plotting window and eliminates a redundant local.
2018-10-08 22:56:31 -04:00
Thomas Harte
e410302237
Switches to real SMS line output composition.
...
Including setting the sprite collision bit.
2018-10-08 22:43:10 -04:00
Thomas Harte
bca2161a05
Fixes TMS text mode for the new addressing order.
2018-10-07 21:09:01 -04:00
Thomas Harte
5f789092be
Flips sprite priority in the temporary renderer.
...
The better to test other issues in the interim.
2018-10-07 19:16:35 -04:00
Thomas Harte
6975ed22c0
Doubles down on address-storage format, and implements the vertical scrolling lock.
2018-10-07 18:55:35 -04:00
Thomas Harte
3bead07043
Introduces proper indirection for sprite patterns.
...
This seems to work, so the onus is now back on the rendering loop.
2018-10-07 17:15:42 -04:00
Thomas Harte
ee20e42372
Makes initial attempt at collecting sprite contents.
...
With test plotting, indicating some sort of issue.
2018-10-07 16:53:25 -04:00
Thomas Harte
df411b4ede
Corrects storage of visible sprites.
2018-10-07 16:40:32 -04:00
Thomas Harte
bfb9d8ccb6
At least attempts to use proper addressing for sprite info fetches.
2018-10-07 14:32:20 -04:00
Thomas Harte
338aec2930
Groups background fetches and experimentally seeks to daub sprites as white.
2018-10-06 22:07:04 -04:00
Thomas Harte
e6510dc87b
Attempts to get at least as far as picking visible sprite indices.
2018-10-06 19:27:19 -04:00
Thomas Harte
7830cda912
Implements line querying and most of line interrupts.
2018-10-04 22:50:35 -04:00
Thomas Harte
aac97a8983
Re-revokes fine scroll on the top two lines when requested.
2018-10-04 19:18:15 -04:00
Thomas Harte
ca26dfcd61
Correct Master System palette writes.
2018-10-04 19:12:31 -04:00
Thomas Harte
858721a7a5
Added left border hiding.
2018-10-04 18:52:23 -04:00
Thomas Harte
89db1d6a6a
Switches to a more accurate means of left-padding.
2018-10-04 18:44:49 -04:00
Thomas Harte
de4e5c40aa
Implements horizontal scrolling lock.
2018-10-03 23:28:33 -04:00
Thomas Harte
05248ab990
Starts to reimplement Master System output.
2018-10-03 23:13:21 -04:00
Thomas Harte
252f47a425
Ensures no pixel output on line one before end, and adds a temporary debugging test.
2018-10-02 22:59:20 -04:00
Thomas Harte
be52b31b5c
Attempts fully to revive text mode.
2018-10-02 22:05:58 -04:00
Thomas Harte
23c3fa6993
Fixed: it's the SMS that has 8 sprites, not text mode (which has none).
2018-10-02 22:01:43 -04:00
Thomas Harte
499fc62187
Sets things up for implementation of the inner mode-specific logic.
2018-10-02 21:58:09 -04:00
Thomas Harte
1dd5272190
Ensures real-time output of all areas, to ensure proper palette response.
2018-10-02 21:18:28 -04:00
Thomas Harte
5361120353
Restores a stable frame.
2018-10-02 21:05:30 -04:00
Thomas Harte
60bab8fdf1
Starts to reformulate TMS collection as coroutines.
...
For the time being, thereby breaks all video. A static screen of the border colour is all you'll see.
2018-10-01 23:03:17 -04:00
Thomas Harte
91aa8f9295
Amps up colour content a little.
2018-09-30 20:47:26 -04:00
Thomas Harte
23191efc05
Starts writing and referring to colour RAM for colours.
2018-09-29 19:50:13 -04:00
Thomas Harte
0d8af010b6
Takes a stab at tile reversal and vertical scrolling.
2018-09-28 22:37:10 -04:00
Thomas Harte
7b9bb772ca
Corrected to give a not-exactly-indexed-correctly approximation of what's on display.
2018-09-28 21:03:51 -04:00
Thomas Harte
f7e211c245
Makes first attempt to put something vaguely like the Master System tile map on screen.
2018-09-28 20:39:14 -04:00
Thomas Harte
35c2e74af8
Attempts to establish a coroutine-ish structure for access patterns.
...
The Master System mode, inevitably, is the test case.
2018-09-27 22:33:41 -04:00
Thomas Harte
19482a563f
Attempts to explicitly make room for the SMS VDP mode.
2018-09-27 21:22:57 -04:00
Thomas Harte
9683c8f664
Advances towards the Master System actually receiving interrupts.
2018-09-23 15:58:23 -04:00
Thomas Harte
e7f4babf41
Starts taking steps towards SMS/GG and V9938/9958 support.
...
Specifically: routine namespace stuff, plus the intention to move to a table-based operation+cost version of timing. Reordering works fine for the TMS, and probably would also for the SMS/GG, but it'd be problematic with the command engine of the V9938/9958 and maintaining a consistent set of code is easier.
2018-09-17 22:59:16 -04:00
Thomas Harte
a38639d099
Eliminates the concept of an iCoordinate.
...
Real-life precision appears not to support the idea of sub-sample pixel storage.
2018-09-12 20:05:39 -04:00
Thomas Harte
92065813ef
Ensures only the first 8px of sprites is output in 8x8 mode.
...
Also adds a little extra documentation.
2018-07-15 22:21:29 -04:00
Thomas Harte
5d6b5d9f10
Eliminates all emdashes in cross-platform code.
2018-05-13 15:34:31 -04:00
Thomas Harte
0b771ce61a
Removes all instances of the copyright symbol.
2018-05-13 15:19:52 -04:00
Thomas Harte
1c605d58e3
Removes the CRT requirement for an integral relationship between cycles and samples.
2018-04-16 20:00:56 -04:00
Thomas Harte
33281b9d89
Introduces S-Video as a video signal type at the interface level.
2018-03-30 10:25:41 -04:00
Thomas Harte
705d53cc21
Picks a phase for the TMS empirically.
2018-03-03 13:53:00 -05:00
Thomas Harte
ea13c7dd32
Implements multicolour mode on the TMS.
2018-03-02 23:08:01 -05:00
Thomas Harte
cabad6fc05
Optimises the inner TMS loops slightly.
2018-02-21 21:29:17 -05:00
Thomas Harte
2fe0ceb52a
Sets TMS input gamma.
2018-01-13 22:19:41 -05:00
Thomas Harte
bcc7ad0c30
Corrects bad TMS sprite selections on the top row of the screen.
2018-01-06 16:26:11 -05:00
Thomas Harte
ac80d10cd8
Separates the component parts of running an audio stream: task deferral, filtering and generation.
...
Walking towards improving opportunities for composition.
2017-12-17 21:26:06 -05:00
Thomas Harte
ec4c259695
Removes unused file.
2017-12-14 21:19:09 -05:00
Thomas Harte
ad50b6b1fb
Corrects TMS' get_time_until_interrupt
when the next interrupt is exactly a frame away.
2017-12-14 21:12:51 -05:00
Thomas Harte
3da323c657
Corrects lingering free TMS read.
2017-12-14 20:30:56 -05:00
Thomas Harte
aca7842ca4
Better documents and tidies the TMS9918.
2017-12-14 20:27:26 -05:00
Thomas Harte
c36de4f640
Attempts real VRAM access timings, correcting a frame timing error as I go.
2017-12-13 22:37:27 -05:00
Thomas Harte
5d0c33d545
Corrects occasional TMS sprite glitching.
2017-12-12 22:19:33 -05:00
Thomas Harte
b0616ee10c
Adds one-before-the-graphics as a line for video collection.
...
Thereby corrects sprites on line 0.
2017-12-12 21:35:33 -05:00
Thomas Harte
f957344ac4
Corrects TMS failure to show background through tile layer.
2017-12-09 23:15:04 -05:00
Thomas Harte
b3fbd0f352
Tidies up some of the TMS' magic constants.
2017-12-09 23:08:07 -05:00
Thomas Harte
042edc72f7
Adjusts TMS declared timing so as to be in-phase with an NTSC clock, and adopts an alternative palette.
2017-12-09 22:28:34 -05:00
Thomas Harte
943418c434
Reformulates TMS sprite plotting to set the collision flag and to support magnified sprites.
2017-12-09 20:30:12 -05:00
Thomas Harte
7d7e2538bd
Introduces a computationally simplified inner loop for TMS graphics modes, modelled on that for text.
2017-12-09 16:02:33 -05:00
Thomas Harte
7a544731e2
Makes minor tidiness improvements to the TMS.
2017-12-08 22:20:21 -05:00
Thomas Harte
e1914b4f16
Attempts to add a proper intermediate buffer for sprites to allow the split of collection and output.
2017-12-08 22:12:39 -05:00
Thomas Harte
8653eb8b55
Corrects various latent errors in optimised TMS video collection.
2017-12-06 20:24:29 -05:00
Thomas Harte
a4f0a260fd
Reformulates the TMS graphics mode fetch loop to try to eliminate heavy conditionality. Temporarily introduces some sprite selection issues.
2017-12-05 22:39:03 -05:00
Thomas Harte
d4a53e82bb
Replaces manual retread of memcpy
with standard memcpy
.
2017-12-05 18:21:34 -05:00
Thomas Harte
6eedc99286
Makes substantial optimisations to text mode.
...
Character optimisations to come.
2017-12-04 22:18:51 -05:00
Thomas Harte
a473338abe
Makes minor type conversion fixes.
2017-12-03 22:24:48 -05:00
Thomas Harte
ad3df36c20
Corrects sprite information collection to cover all four.
2017-12-03 14:51:55 -05:00
Thomas Harte
38b11893e8
Takes first steps towards sprite display on the TMS.
2017-12-02 22:13:43 -05:00
Thomas Harte
e4534775b0
Cleans up and zooms in on the TMS slightly.
2017-12-02 17:48:31 -05:00
Thomas Harte
fe0cdc8d69
Corrects colour fetching in TMS Graphics II to be a function of row.
2017-12-02 16:10:29 -05:00
Thomas Harte
ca26ce8400
Slightly corrects style errors in the Cartridge hierarchy, and introduces mapping of .ROM to the MSX when appropriate.
2017-12-02 16:01:30 -05:00
Thomas Harte
d3dd8f3f2a
Implements screen 2 addressing.
2017-12-02 14:05:52 -05:00
Thomas Harte
3c8d2d579d
Resolves remaining sources of text mode instability.
2017-11-30 22:48:07 -05:00
Thomas Harte
edcbb3dfed
Tidies code a little and thereby uncovers and corrects one cause of output instability.
2017-11-30 22:19:53 -05:00
Thomas Harte
9c8158753e
Makes a first attempt at displaying text mode.
2017-11-30 21:35:26 -05:00
Thomas Harte
ee84f33ab5
Ensures that the 9918 admits that it is the source of interrupts.
2017-11-29 21:33:43 -05:00
Thomas Harte
aa4eef41d8
Seeks to introduce MSX interrupts.
2017-11-29 20:31:55 -05:00
Thomas Harte
ecd7d4731b
Advances emulation to showing what looks like appropriate text on screen.
2017-11-28 21:27:15 -05:00
Thomas Harte
563aa051e4
Simplifies code a little and gives something on screen.
2017-11-28 21:19:28 -05:00
Thomas Harte
642bb8333f
Introduces something of a first attempt at graphics collection and display. An unsuccessful attempt.
2017-11-28 21:10:30 -05:00
Thomas Harte
c558e86e03
Adds border colour output.
2017-11-27 22:05:40 -05:00
Thomas Harte
dbb14ea2e2
Corrects counting deficiencies that could produce an unstable display.
2017-11-27 21:36:12 -05:00
Thomas Harte
173e16b107
Corrects the 9918 so that it terminates.
2017-11-27 19:48:04 -05:00
Thomas Harte
7d2adad67e
Adds the absolute most basic version of in-frame time keeping, to display a white square.
2017-11-27 19:43:33 -05:00
Thomas Harte
d33612def5
Ensures the MSX provides a clock to the VDP.
2017-11-26 20:07:30 -05:00
Thomas Harte
9cb6ca3440
Adds elementary decoding of VDP accesses.
2017-11-26 20:01:11 -05:00
Thomas Harte
0eb5dd9688
Introduces the fundamentals of bus routing for the MSX.
2017-11-26 16:47:59 -05:00
Thomas Harte
a14b53a9ab
Adds a TMS9918 skeleton plus enough in the MSX to get to a blank screen in SDL/kiosk mode.
2017-11-26 13:28:26 -05:00