Thomas Harte
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9f69dbf31a
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Adds half-updating of RAM pointer.
This emulator now passes the first screen of the SMS VDP test.
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2018-10-10 21:59:08 -04:00 |
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Thomas Harte
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63fb3f03d1
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Corrects address loading upon accesses of registers other than 0.
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2018-10-10 21:47:48 -04:00 |
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Thomas Harte
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2e379b0834
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Adds latching of scroll values.
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2018-10-10 21:28:18 -04:00 |
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Thomas Harte
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f00f6c8c23
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Allows the frame interrupt to be placed anywhere in the frame.
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2018-10-10 21:07:39 -04:00 |
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Thomas Harte
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50e23f4a2e
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Fixes 16px-high sprites.
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2018-10-10 20:34:00 -04:00 |
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Thomas Harte
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acdc84e08c
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Improves test slightly, and fixes line interrupt reload value setting.
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2018-10-09 22:14:35 -04:00 |
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Thomas Harte
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c128ddb549
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Introduces a first unit test for line interrupts and corrects backup behaviour.
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2018-10-09 21:49:21 -04:00 |
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Thomas Harte
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dccf17e770
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Makes a first serious attempt at Master System line interrupts.
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2018-10-09 20:51:09 -04:00 |
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Thomas Harte
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2d8ab72e22
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Fixed proper starting position for (interrupted) tile drawing.
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2018-10-08 23:13:37 -04:00 |
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Thomas Harte
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748366c70e
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Corrects buffer overrun when the horizontal scroll lock is on.
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2018-10-08 23:06:22 -04:00 |
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Thomas Harte
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7a74fe2ff7
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Corrects tile plotting window and eliminates a redundant local.
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2018-10-08 22:56:31 -04:00 |
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Thomas Harte
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e410302237
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Switches to real SMS line output composition.
Including setting the sprite collision bit.
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2018-10-08 22:43:10 -04:00 |
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Thomas Harte
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bca2161a05
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Fixes TMS text mode for the new addressing order.
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2018-10-07 21:09:01 -04:00 |
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Thomas Harte
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5f789092be
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Flips sprite priority in the temporary renderer.
The better to test other issues in the interim.
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2018-10-07 19:16:35 -04:00 |
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Thomas Harte
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6975ed22c0
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Doubles down on address-storage format, and implements the vertical scrolling lock.
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2018-10-07 18:55:35 -04:00 |
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Thomas Harte
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24644f1dd1
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Adds a low-pass filter, picked entirely by ear, and switches to composite output, at least for now.
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2018-10-07 18:39:03 -04:00 |
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Thomas Harte
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3bead07043
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Introduces proper indirection for sprite patterns.
This seems to work, so the onus is now back on the rendering loop.
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2018-10-07 17:15:42 -04:00 |
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Thomas Harte
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ee20e42372
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Makes initial attempt at collecting sprite contents.
With test plotting, indicating some sort of issue.
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2018-10-07 16:53:25 -04:00 |
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Thomas Harte
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df411b4ede
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Corrects storage of visible sprites.
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2018-10-07 16:40:32 -04:00 |
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Thomas Harte
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bfb9d8ccb6
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At least attempts to use proper addressing for sprite info fetches.
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2018-10-07 14:32:20 -04:00 |
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Thomas Harte
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338aec2930
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Groups background fetches and experimentally seeks to daub sprites as white.
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2018-10-06 22:07:04 -04:00 |
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Thomas Harte
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e6510dc87b
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Attempts to get at least as far as picking visible sprite indices.
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2018-10-06 19:27:19 -04:00 |
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Thomas Harte
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76f3b9f6ba
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Fixed: paging writes don't obstruct RAM.
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2018-10-06 14:26:00 -04:00 |
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Thomas Harte
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7830cda912
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Implements line querying and most of line interrupts.
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2018-10-04 22:50:35 -04:00 |
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Thomas Harte
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aac97a8983
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Re-revokes fine scroll on the top two lines when requested.
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2018-10-04 19:18:15 -04:00 |
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Thomas Harte
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ca26dfcd61
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Correct Master System palette writes.
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2018-10-04 19:12:31 -04:00 |
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Thomas Harte
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858721a7a5
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Added left border hiding.
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2018-10-04 18:52:23 -04:00 |
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Thomas Harte
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89db1d6a6a
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Switches to a more accurate means of left-padding.
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2018-10-04 18:44:49 -04:00 |
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Thomas Harte
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de4e5c40aa
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Implements horizontal scrolling lock.
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2018-10-03 23:28:33 -04:00 |
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Thomas Harte
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05248ab990
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Starts to reimplement Master System output.
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2018-10-03 23:13:21 -04:00 |
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Thomas Harte
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252f47a425
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Ensures no pixel output on line one before end, and adds a temporary debugging test.
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2018-10-02 22:59:20 -04:00 |
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Thomas Harte
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be52b31b5c
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Attempts fully to revive text mode.
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2018-10-02 22:05:58 -04:00 |
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Thomas Harte
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23c3fa6993
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Fixed: it's the SMS that has 8 sprites, not text mode (which has none).
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2018-10-02 22:01:43 -04:00 |
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Thomas Harte
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499fc62187
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Sets things up for implementation of the inner mode-specific logic.
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2018-10-02 21:58:09 -04:00 |
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Thomas Harte
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1dd5272190
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Ensures real-time output of all areas, to ensure proper palette response.
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2018-10-02 21:18:28 -04:00 |
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Thomas Harte
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5361120353
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Restores a stable frame.
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2018-10-02 21:05:30 -04:00 |
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Thomas Harte
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60bab8fdf1
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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.
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2018-10-01 23:03:17 -04:00 |
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Thomas Harte
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cc99b0f532
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Fixes typo.
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2018-09-30 20:48:55 -04:00 |
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Thomas Harte
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91aa8f9295
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Amps up colour content a little.
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2018-09-30 20:47:26 -04:00 |
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Thomas Harte
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e9328d819e
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Switches to RGB output, at least for development.
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2018-09-30 20:47:03 -04:00 |
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Thomas Harte
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48ece623e7
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Adds the Sega Master System to SConstruct.
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2018-09-30 20:46:38 -04:00 |
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Thomas Harte
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23191efc05
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Starts writing and referring to colour RAM for colours.
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2018-09-29 19:50:13 -04:00 |
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Thomas Harte
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0d8af010b6
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Takes a stab at tile reversal and vertical scrolling.
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2018-09-28 22:37:10 -04:00 |
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Thomas Harte
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7b9bb772ca
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Corrected to give a not-exactly-indexed-correctly approximation of what's on display.
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2018-09-28 21:03:51 -04:00 |
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Thomas Harte
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f7e211c245
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Makes first attempt to put something vaguely like the Master System tile map on screen.
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2018-09-28 20:39:14 -04:00 |
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Thomas Harte
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43bcb6415b
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Merge branch 'master' into MasterSystemVDP
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2018-09-27 22:38:15 -04:00 |
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Thomas Harte
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15ec4aaa43
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Merge pull request #554 from TomHarte/65C02s
Corrects Rockwell and WDC references.
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2018-09-27 22:37:45 -04:00 |
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Thomas Harte
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364859467f
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Corrects Rockwell and WDC references.
Also shuffles the NES CPU type up into the top position, so this is a strict progression in terms of functionality.
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2018-09-27 22:36:45 -04:00 |
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Thomas Harte
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35c2e74af8
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Attempts to establish a coroutine-ish structure for access patterns.
The Master System mode, inevitably, is the test case.
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2018-09-27 22:33:41 -04:00 |
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Thomas Harte
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19482a563f
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Attempts to explicitly make room for the SMS VDP mode.
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2018-09-27 21:22:57 -04:00 |
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