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.
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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
