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
7830cda912
Implements line querying and most of line interrupts.
2018-10-04 22:50:35 -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
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
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
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
b3fbd0f352
Tidies up some of the TMS' magic constants.
2017-12-09 23:08:07 -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
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
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
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
3c8d2d579d
Resolves remaining sources of text mode instability.
2017-11-30 22:48:07 -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
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
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
