da00c832f5
Corrects colour fetching for multicolour text mode.
2018-10-18 20:38:00 -04:00
8ff265c3a1
Corrects multicolour text mode.
2018-10-18 20:25:42 -04:00
1fc88c4eff
Corrects off-by-one error in line fetching coroutines.
2018-10-16 21:36:31 -04:00
5dfe7d8596
Corrects most of TMS sprite drawing.
2018-10-16 20:49:04 -04:00
231009b901
Makes faulty attempt to reintroduce TMS-mode sprites.
2018-10-16 20:00:06 -04:00
1c5f939aea
Reintroduces tiles and some element of sprites in regular TMS mode.
2018-10-14 21:52:13 -04:00
c1e6406fc9
Corrects sprite accumulation.
2018-10-14 19:56:09 -04:00
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
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
9e52ead09a
Ensures sprite scanning doesn't improperly set collision flag; that slot 151 is filled.
2018-10-12 19:50:48 -04:00
f6af6778ab
Moves scrolling latch to proper position and implements 4-window fetching offset.
2018-10-11 22:36:27 -04:00
52e02db5c8
Introduces horizontal counter latching and reading.
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Then makes a new guess at frame IRQ position. But gets it wrong. Hmmm.
2018-10-11 19:56:32 -04:00
2e379b0834
Adds latching of scroll values.
2018-10-10 21:28:18 -04:00
f00f6c8c23
Allows the frame interrupt to be placed anywhere in the frame.
2018-10-10 21:07:39 -04:00
50e23f4a2e
Fixes 16px-high sprites.
2018-10-10 20:34:00 -04:00
e410302237
Switches to real SMS line output composition.
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Including setting the sprite collision bit.
2018-10-08 22:43:10 -04:00
bca2161a05
Fixes TMS text mode for the new addressing order.
2018-10-07 21:09:01 -04:00
6975ed22c0
Doubles down on address-storage format, and implements the vertical scrolling lock.
2018-10-07 18:55:35 -04:00
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
ee20e42372
Makes initial attempt at collecting sprite contents.
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With test plotting, indicating some sort of issue.
2018-10-07 16:53:25 -04:00
df411b4ede
Corrects storage of visible sprites.
2018-10-07 16:40:32 -04:00
bfb9d8ccb6
At least attempts to use proper addressing for sprite info fetches.
2018-10-07 14:32:20 -04:00
338aec2930
Groups background fetches and experimentally seeks to daub sprites as white.
2018-10-06 22:07:04 -04:00
e6510dc87b
Attempts to get at least as far as picking visible sprite indices.
2018-10-06 19:27:19 -04:00
7830cda912
Implements line querying and most of line interrupts.
2018-10-04 22:50:35 -04:00
858721a7a5
Added left border hiding.
2018-10-04 18:52:23 -04:00
de4e5c40aa
Implements horizontal scrolling lock.
2018-10-03 23:28:33 -04:00
05248ab990
Starts to reimplement Master System output.
2018-10-03 23:13:21 -04:00
499fc62187
Sets things up for implementation of the inner mode-specific logic.
2018-10-02 21:58:09 -04:00
5361120353
Restores a stable frame.
2018-10-02 21:05:30 -04:00
60bab8fdf1
Starts to reformulate TMS collection as coroutines.
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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
91aa8f9295
Amps up colour content a little.
2018-09-30 20:47:26 -04:00
23191efc05
Starts writing and referring to colour RAM for colours.
2018-09-29 19:50:13 -04:00
0d8af010b6
Takes a stab at tile reversal and vertical scrolling.
2018-09-28 22:37:10 -04:00
7b9bb772ca
Corrected to give a not-exactly-indexed-correctly approximation of what's on display.
2018-09-28 21:03:51 -04:00
f7e211c245
Makes first attempt to put something vaguely like the Master System tile map on screen.
2018-09-28 20:39:14 -04:00
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
19482a563f
Attempts to explicitly make room for the SMS VDP mode.
2018-09-27 21:22:57 -04:00
9683c8f664
Advances towards the Master System actually receiving interrupts.
2018-09-23 15:58:23 -04:00
e7f4babf41
Starts taking steps towards SMS/GG and V9938/9958 support.
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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
0b771ce61a
Removes all instances of the copyright symbol.
2018-05-13 15:19:52 -04:00
bcc7ad0c30
Corrects bad TMS sprite selections on the top row of the screen.
2018-01-06 16:26:11 -05:00
ac80d10cd8
Separates the component parts of running an audio stream: task deferral, filtering and generation.
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Walking towards improving opportunities for composition.
2017-12-17 21:26:06 -05:00
ec4c259695
Removes unused file.
2017-12-14 21:19:09 -05:00
aca7842ca4
Better documents and tidies the TMS9918.
2017-12-14 20:27:26 -05:00
Thomas Harte