452 Commits

Author	SHA1	Message	Date
Thomas Harte	2ffde4c3c2	Corrects SCC volume errors. ... Which were leading to substantial overflow.	2018-01-07 09:59:00 -05:00
Thomas Harte	57ddfcd645	Corrects AY counter type.	2018-01-06 23:16:01 -05:00
Thomas Harte	fc16e8eb8c	Makes first attempt at actually implementing the SCC.	2018-01-06 23:15:42 -05:00
Thomas Harte	655b971976	Establishes that there is such as a thing as a Konami SCC. ... Creates one, ensures it appears in memory when intended to, lets it handle reads and writes. It currently does nothing.	2018-01-06 20:15:55 -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	2dc1d4443e	Separates LowpassFilter and SampleSource.	2017-12-18 21:39:23 -05:00
Thomas Harte	f8a2459c91	Corrects two lingering adaptation errors in the Vic-20.	2017-12-17 21:43:08 -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	798cdba979	8255: update_outputs now affects only those ports designated as outputs.	2017-12-10 17:55:37 -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