Thomas Harte
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ede2696a77
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Edges further towards implementing the IIe video subsystem.
All video-specific switches are in place, and mostly honoured, and a IIe machine configuration is advertised at least.
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2018-07-24 22:15:42 -04:00 |
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Thomas Harte
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c97c5fa03a
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[Re-]recalibrates CRT retrace period and affected view windows.
In the hope of moving the CPC closer to the real CTM visible area.
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2018-07-05 22:07:18 -04:00 |
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Thomas Harte
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d380595ad4
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Unrolls the loops for slightly fewer conditionals.
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2018-06-03 07:27:03 -04:00 |
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Thomas Harte
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d84b8700a3
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Switches the Apple II to one byte per pixel.
Just trying to get it right for now; optimisation to come.
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2018-06-02 22:03:45 -04:00 |
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Thomas Harte
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69dc3cc4d8
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Switches to using the same varying for byte and subpixel selection.
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2018-06-01 22:52:29 -04:00 |
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Thomas Harte
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8dd7c6ef23
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Eliminates 'reversed_c' as I no longer believe low-resolution colour numbers are reversed.
Also gets explicit about phase.
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2018-05-29 22:30:45 -04:00 |
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Thomas Harte
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0b771ce61a
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Removes all instances of the copyright symbol.
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2018-05-13 15:19:52 -04:00 |
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Thomas Harte
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aebe8a64a2
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Removes empty printf.
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2018-04-20 10:58:23 -04:00 |
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Thomas Harte
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e03a403a51
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Adds exposition.
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2018-04-19 20:41:09 -04:00 |
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Thomas Harte
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ba43b3e6b8
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Reverses bit order of graphics stream; apparently the ROM is backwards.
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2018-04-19 20:39:38 -04:00 |
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Thomas Harte
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5f1c210746
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Simplifies and corrects low-resolution colour generation.
Possibly disproving the premise for this whole experiment, all colours seem immediately to work correctly. Hmmm.
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2018-04-18 21:41:11 -04:00 |
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Thomas Harte
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6547560e52
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Gives the CRT the ability to move iCoordinate multiplication outside of the fragment loop.
That resolves precision issues, as were plaguing the Apple II.
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2018-04-18 19:29:03 -04:00 |
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Thomas Harte
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a07c99d778
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Completes first draft of Apple II video hardware.
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2018-04-17 22:04:02 -04:00 |
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Thomas Harte
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9bc470027e
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Put enough in place to get a visual representation of video memory.
Not the correct one, and so as to indicate that the machine isn't booting, surprisingly.
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2018-04-15 19:35:08 -04:00 |
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Thomas Harte
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335c633884
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Retrenches temporarily to full 8bpp output; introduces extra half a colour cycle of pause.
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2018-04-15 18:54:05 -04:00 |
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Thomas Harte
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abe47b6ed8
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Makes first attempt at a stable display area. Not entirely successful.
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2018-04-15 18:00:40 -04:00 |
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Thomas Harte
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61659faeaa
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Adds the necessary call-outs to allow implementation of video generation.
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2018-04-15 15:13:07 -04:00 |
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Thomas Harte
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7efee9b52b
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Does the bare minimum to create a class skeleton for Apple II implementation.
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2018-04-14 19:46:15 -04:00 |
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