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.
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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.
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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.
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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.
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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.
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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.
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Real-life precision appears not to support the idea of sub-sample pixel storage.
2018-09-12 20:05:39 -04:00
Thomas Harte
31b048f966
Ensures all bools start in a valid state.
2018-09-10 22:21:03 -04:00
Thomas Harte
7b9c1bb69c
Makes minor layout improvements.
2018-09-09 21:02:31 -04:00
Thomas Harte
70c4d6b9b3
Adds a one second delay between controller and drive motor off.
2018-08-03 21:13:18 -04:00
Thomas Harte
98bb5bd9f1
Ensures flux bits are observable for two cycles rather than one; it should be 1us.
2018-07-31 23:01:11 -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
cd464fc7de
Corrects status logging.
2018-06-26 20:53:08 -04:00
Thomas Harte
df8c896193
Removes unused state and implements AND output readback.
2018-06-26 19:31:16 -04:00
Thomas Harte
59f8eeb05a
Ensures the AY goes high impedance when not in read mode.
2018-06-25 20:48:24 -04:00
Thomas Harte
5ab4cfee84
Factors out repeated hex-size setting.
2018-06-21 19:27:54 -04:00
Thomas Harte
a9eb0d02c6
Returns sanity to 8272 logging.
2018-06-20 23:02:32 -04:00
