Thomas Harte
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655b971976
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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.
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2018-01-06 20:15:55 -05:00 |
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Thomas Harte
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bcc7ad0c30
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Corrects bad TMS sprite selections on the top row of the screen.
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2018-01-06 16:26:11 -05:00 |
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Thomas Harte
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2dc1d4443e
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Separates LowpassFilter and SampleSource.
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2017-12-18 21:39:23 -05:00 |
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Thomas Harte
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f8a2459c91
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Corrects two lingering adaptation errors in the Vic-20.
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2017-12-17 21:43:08 -05:00 |
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Thomas Harte
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ac80d10cd8
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Separates the component parts of running an audio stream: task deferral, filtering and generation.
Walking towards improving opportunities for composition.
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2017-12-17 21:26:06 -05:00 |
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Thomas Harte
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ec4c259695
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Removes unused file.
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2017-12-14 21:19:09 -05:00 |
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Thomas Harte
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ad50b6b1fb
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Corrects TMS' get_time_until_interrupt when the next interrupt is exactly a frame away.
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2017-12-14 21:12:51 -05:00 |
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Thomas Harte
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3da323c657
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Corrects lingering free TMS read.
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2017-12-14 20:30:56 -05:00 |
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Thomas Harte
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aca7842ca4
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Better documents and tidies the TMS9918.
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2017-12-14 20:27:26 -05:00 |
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Thomas Harte
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c36de4f640
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Attempts real VRAM access timings, correcting a frame timing error as I go.
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2017-12-13 22:37:27 -05:00 |
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Thomas Harte
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5d0c33d545
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Corrects occasional TMS sprite glitching.
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2017-12-12 22:19:33 -05:00 |
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Thomas Harte
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b0616ee10c
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Adds one-before-the-graphics as a line for video collection.
Thereby corrects sprites on line 0.
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2017-12-12 21:35:33 -05:00 |
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Thomas Harte
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798cdba979
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8255: update_outputs now affects only those ports designated as outputs.
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2017-12-10 17:55:37 -05:00 |
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Thomas Harte
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f957344ac4
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Corrects TMS failure to show background through tile layer.
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2017-12-09 23:15:04 -05:00 |
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Thomas Harte
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b3fbd0f352
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Tidies up some of the TMS' magic constants.
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2017-12-09 23:08:07 -05:00 |
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Thomas Harte
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042edc72f7
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Adjusts TMS declared timing so as to be in-phase with an NTSC clock, and adopts an alternative palette.
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2017-12-09 22:28:34 -05:00 |
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Thomas Harte
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943418c434
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Reformulates TMS sprite plotting to set the collision flag and to support magnified sprites.
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2017-12-09 20:30:12 -05:00 |
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Thomas Harte
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7d7e2538bd
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Introduces a computationally simplified inner loop for TMS graphics modes, modelled on that for text.
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2017-12-09 16:02:33 -05:00 |
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Thomas Harte
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7a544731e2
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Makes minor tidiness improvements to the TMS.
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2017-12-08 22:20:21 -05:00 |
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Thomas Harte
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e1914b4f16
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Attempts to add a proper intermediate buffer for sprites to allow the split of collection and output.
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2017-12-08 22:12:39 -05:00 |
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Thomas Harte
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8653eb8b55
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Corrects various latent errors in optimised TMS video collection.
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2017-12-06 20:24:29 -05:00 |
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Thomas Harte
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a4f0a260fd
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Reformulates the TMS graphics mode fetch loop to try to eliminate heavy conditionality. Temporarily introduces some sprite selection issues.
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2017-12-05 22:39:03 -05:00 |
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Thomas Harte
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d4a53e82bb
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Replaces manual retread of memcpy with standard memcpy.
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2017-12-05 18:21:34 -05:00 |
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Thomas Harte
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6eedc99286
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Makes substantial optimisations to text mode.
Character optimisations to come.
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2017-12-04 22:18:51 -05:00 |
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Thomas Harte
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a473338abe
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Makes minor type conversion fixes.
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2017-12-03 22:24:48 -05:00 |
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Thomas Harte
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ad3df36c20
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Corrects sprite information collection to cover all four.
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2017-12-03 14:51:55 -05:00 |
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Thomas Harte
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38b11893e8
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Takes first steps towards sprite display on the TMS.
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2017-12-02 22:13:43 -05:00 |
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Thomas Harte
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e4534775b0
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Cleans up and zooms in on the TMS slightly.
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2017-12-02 17:48:31 -05:00 |
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Thomas Harte
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fe0cdc8d69
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Corrects colour fetching in TMS Graphics II to be a function of row.
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2017-12-02 16:10:29 -05:00 |
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Thomas Harte
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ca26ce8400
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Slightly corrects style errors in the Cartridge hierarchy, and introduces mapping of .ROM to the MSX when appropriate.
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2017-12-02 16:01:30 -05:00 |
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Thomas Harte
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d3dd8f3f2a
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Implements screen 2 addressing.
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2017-12-02 14:05:52 -05:00 |
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Thomas Harte
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3c8d2d579d
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Resolves remaining sources of text mode instability.
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2017-11-30 22:48:07 -05:00 |
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Thomas Harte
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edcbb3dfed
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Tidies code a little and thereby uncovers and corrects one cause of output instability.
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2017-11-30 22:19:53 -05:00 |
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Thomas Harte
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9c8158753e
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Makes a first attempt at displaying text mode.
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2017-11-30 21:35:26 -05:00 |
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Thomas Harte
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ee84f33ab5
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Ensures that the 9918 admits that it is the source of interrupts.
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2017-11-29 21:33:43 -05:00 |
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Thomas Harte
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aa4eef41d8
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Seeks to introduce MSX interrupts.
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2017-11-29 20:31:55 -05:00 |
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Thomas Harte
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ecd7d4731b
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Advances emulation to showing what looks like appropriate text on screen.
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2017-11-28 21:27:15 -05:00 |
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Thomas Harte
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563aa051e4
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Simplifies code a little and gives something on screen.
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2017-11-28 21:19:28 -05:00 |
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Thomas Harte
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642bb8333f
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Introduces something of a first attempt at graphics collection and display. An unsuccessful attempt.
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2017-11-28 21:10:30 -05:00 |
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Thomas Harte
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c558e86e03
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Adds border colour output.
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2017-11-27 22:05:40 -05:00 |
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Thomas Harte
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dbb14ea2e2
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Corrects counting deficiencies that could produce an unstable display.
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2017-11-27 21:36:12 -05:00 |
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Thomas Harte
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173e16b107
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Corrects the 9918 so that it terminates.
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2017-11-27 19:48:04 -05:00 |
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Thomas Harte
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7d2adad67e
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Adds the absolute most basic version of in-frame time keeping, to display a white square.
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2017-11-27 19:43:33 -05:00 |
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Thomas Harte
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d33612def5
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Ensures the MSX provides a clock to the VDP.
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2017-11-26 20:07:30 -05:00 |
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Thomas Harte
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9cb6ca3440
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Adds elementary decoding of VDP accesses.
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2017-11-26 20:01:11 -05:00 |
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Thomas Harte
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0eb5dd9688
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Introduces the fundamentals of bus routing for the MSX.
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2017-11-26 16:47:59 -05:00 |
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Thomas Harte
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a14b53a9ab
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Adds a TMS9918 skeleton plus enough in the MSX to get to a blank screen in SDL/kiosk mode.
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2017-11-26 13:28:26 -05:00 |
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Thomas Harte
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c827d14d97
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Corrects various GCC warnings across the 6560, CPC, TIA, Oric video and elsewhere.
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2017-11-12 17:17:27 -05:00 |
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Thomas Harte
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5408efe9b5
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Flags obvious default options within the 6560, Vic-20 and DynamicMachine.
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2017-11-12 16:41:09 -05:00 |
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Thomas Harte
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6d80856f02
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Attempts to eliminate warnings around a meaningless value and an unused label in the 8272.
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2017-11-12 16:34:51 -05:00 |
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Thomas Harte
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4778616fd7
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Eliminates unused result and unused label.
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2017-11-12 16:30:23 -05:00 |
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Thomas Harte
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5aef81cf24
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Commutes cross-platform #pragma marks to //MARK:s.
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2017-11-12 15:59:11 -05:00 |
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Thomas Harte
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2e15fab651
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Doubles down on <cX> over <X.h> for C includes, and usage of the namespace for those types and functions.
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2017-11-11 15:28:40 -05:00 |
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Thomas Harte
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5b6ea35d96
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Corrects initialisation ordering for the ZX80/81, C1540 and AY-3-8910.
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2017-11-10 22:31:27 -05:00 |
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Thomas Harte
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4cbc87a17d
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Corrects out-of-order initialisations for the 1770, Atari 2600 joystick, Pitfall II bus extender, Microdisc and 6502.
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2017-11-10 22:20:44 -05:00 |
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Thomas Harte
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ff7ba526fb
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Corrects improper initialisation order on the 6560.
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2017-11-10 22:05:35 -05:00 |
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Thomas Harte
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cb015c83e1
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Eliminated C99-style struct initialisations.
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2017-11-10 19:14:19 -05:00 |
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Thomas Harte
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c0055a5a5f
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Further builds up SConstruct, correcting many missed imports and a couple of improper uses of C99 in C++ code.
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2017-11-09 22:04:49 -05:00 |
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Thomas Harte
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f95515ae81
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Eliminates a large number of instance of end-of-line tabs.
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2017-11-07 22:51:06 -05:00 |
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Thomas Harte
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ad9df4bb90
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Commutes uint8_t *, uint16_t *, uint32_t *, size_t, off_t and long to functional-style casts.
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2017-10-21 22:30:15 -04:00 |
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Thomas Harte
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ec999446e8
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Commutes int and unsigned casts to the functional style.
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2017-10-21 21:00:40 -04:00 |
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Thomas Harte
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5e3e91373a
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Switches all unsigned int and double casts to functional style.
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2017-10-21 19:49:04 -04:00 |
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Thomas Harte
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91b867a7b3
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Ensures full 8272 instance state initialisation.
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2017-10-17 22:11:01 -04:00 |
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Thomas Harte
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3944e734d3
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Ensures full 6845 instance state initialisation and uses an unsigned shifter.
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2017-10-17 22:10:28 -04:00 |
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Thomas Harte
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97a2be71e3
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Introduces flush_tracks to Drive, while switching its interface to using Track::Address and adjusting associated integer types.
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2017-10-06 21:45:12 -04:00 |
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Thomas Harte
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edb9fd301c
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Begins this project's conversion to functional-style casts.
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2017-10-03 22:04:15 -04:00 |
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Thomas Harte
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c7f27b2db4
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Renames MFM.[c/h]pp as per its new remit: encoding only.
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2017-09-24 21:40:43 -04:00 |
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Thomas Harte
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2a08bd9ecc
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Factors shifting plus stateful [M]FM token recognition out of the MFMDiskController.
Given the proliferation of MFM-related classes, establishes a subdirectory for them.
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2017-09-24 20:07:56 -04:00 |
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Thomas Harte
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698e4fe550
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Tidies the Disk file hierarchy.
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2017-09-22 22:39:23 -04:00 |
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Thomas Harte
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d6a5f9a29e
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Revokes unnecessary change.
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2017-09-16 18:24:13 -04:00 |
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Thomas Harte
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0d84b4b9dd
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Removes some redundant end_writing calls.
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2017-09-16 17:09:17 -04:00 |
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Thomas Harte
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98751e6ac8
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Ensures that all result phases are exactly the intended length by replacing accumulation with assignment.
Also attempts a different version of control mark behaviour. Experiments.
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2017-09-15 22:59:26 -04:00 |
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Thomas Harte
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35fe4d50d4
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Adds command termination upon drive becoming unready, and copies head and drive selection into ST0.
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2017-09-15 20:26:41 -04:00 |
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Thomas Harte
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4d4a0cf1d2
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Puts the disk controller back into the loop with knowledge about reading mode, and uses that knowledge to cut off the PLL.
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2017-09-14 22:30:40 -04:00 |
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Thomas Harte
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b62f3e726a
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Adds a start-of-execution-phase get-out for drives that aren't ready.
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2017-09-12 20:43:53 -04:00 |
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Thomas Harte
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2f13517f38
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Adjusts the 1770 not to talk directly to the drive about motor status.
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2017-09-11 22:10:56 -04:00 |
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Thomas Harte
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d3c385b471
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Separates the 8272's drive selection signalling from actual drive ownership.
Thereby returns working motor control to the CPC.
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2017-09-11 21:25:26 -04:00 |
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Thomas Harte
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96bf133924
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Withdraws requirement for DiskController users to specify a PLL multiplier or to provide rotation speed.
In the latter case because it's no longer of any interest to the controller, and in the former because I'd rather it be picked automatically.
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2017-09-10 22:56:05 -04:00 |
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Thomas Harte
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0622187ddf
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Strips Controller of all capabilities now housed on the Drive.
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2017-09-10 19:23:23 -04:00 |
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Thomas Harte
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90c7056d12
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Started devolving timed event loop logic down to the drives, moving them closer to modelling real life.
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2017-09-10 14:43:20 -04:00 |
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Thomas Harte
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ff510f3b84
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Explicitly disallows copying of VIAs, and marks the constructor as noexcept.
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2017-09-05 21:21:23 -04:00 |
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Thomas Harte
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7fd6699e0b
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Corrects comment indentation.
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2017-09-05 21:15:15 -04:00 |
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Thomas Harte
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450712f39c
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Improves and corrects 6522 header documentation.
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2017-09-04 14:32:34 -04:00 |
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Thomas Harte
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24b3faa427
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Deconstitutes the 6522 into component parts, templated and non-templated.
Adjusts the Oric, Vic-20 and C-1540 accordingly, albeit with the quickest possible solutions.
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2017-09-04 14:26:04 -04:00 |
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Thomas Harte
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b30bb2a234
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Adds an initial implementation of display skew, as a completely live property.
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2017-08-29 22:16:40 -04:00 |
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Thomas Harte
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334afbc710
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Removes const from get_status and get_register, as both may now logically mutate the object.
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2017-08-27 18:13:55 -04:00 |
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Thomas Harte
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17c13624e5
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Improved comments.
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2017-08-27 18:11:40 -04:00 |
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Thomas Harte
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113349d272
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Started making some formal admissions that different CRTC models exist. Plenty yet to do.
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2017-08-27 18:10:07 -04:00 |
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Thomas Harte
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bdda701207
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Reverts previous unevidenced change.
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2017-08-26 22:58:16 -04:00 |
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Thomas Harte
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487fe83dca
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Ensures that vertical sync and end-of-visible-lines conditions potentially trigger whenever line_counter_ changes, not only when it increments.
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2017-08-26 17:54:54 -04:00 |
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Thomas Harte
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6c5a03187b
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Relocates the HSYNC start test, in order to pass Arnold's cpctest HSYNC start position conformance test.
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2017-08-26 17:22:48 -04:00 |
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Thomas Harte
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7d7aa2f5d5
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Eliminates repetition of the unpacking of register 3 into a horizontal sync count.
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2017-08-26 14:37:03 -04:00 |
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Thomas Harte
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28550c0227
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Breaks the 6845 bus cycle into a phase 1 and a phase 2 per the belief that sync line changes, which are observable, happen at the end of the first phase rather than at the beginning of the next. This may have interrupt timing effects, as machines often derive an interrupt from sync.
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2017-08-26 13:56:23 -04:00 |
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Thomas Harte
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6e99169348
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Permits the 6845's bus state to be examined by an owner, eliminating the need to buffer it in the bus handler. But more than that it allows the CRTC to decide when it adjusts the various outputs respective to the main phase. So a net effect of the change is that the CPC now sees vsync a cycle earlier, because my current reading of the 6845 datasheet is that it is set at the end of phase 1, not the beginning of the next phase 1.
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2017-08-26 12:59:59 -04:00 |
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Thomas Harte
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3caa4705ca
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Limits sync counter size.
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2017-08-26 12:31:19 -04:00 |
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Thomas Harte
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039aed1bd1
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Switches the two sync counters to upward-going rather than downward, as a more likely match to the way the rest of the 6845 implementation.
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2017-08-25 21:26:01 -04:00 |
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Thomas Harte
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a914eadc85
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Ensured that register 6 is checked on every loop.
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2017-08-22 22:17:45 -04:00 |
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Thomas Harte
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e956740c56
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Refactors the 6845 more clearly to break out the acts of ending a line and ending a frame, changing the way the memory address is altered — the end-of-line value is provisionally stored and then used if necessary — in order to do so.
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2017-08-22 21:54:48 -04:00 |
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Thomas Harte
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e88a51e75e
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Worked logic all the way down to the CPC. If the 8272 announces that it is asleep, it is now no longer clocked. Also very slightly cut down on IRQ line chatter to the Z80.
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2017-08-20 12:05:00 -04:00 |
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Thomas Harte
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2d9efccc98
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Introduced a master 'is sleeping' flag. I'm starting to think there's a pattern forming here.
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2017-08-20 10:43:53 -04:00 |
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