Marcel van Kervinck
Y-CTL FF-D0 X-Q6 CLK 0.500us scanline end.pngEnd of scan line. 19 pixels and the last 8 "ones" of X counter bit 6 can be observed.Portable Network Graphics (PNG) - 54.48 kB - 03/06/2017 at 22:30 |
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Y-CTL FF-D0 CLK 6.36us hblank.pngHorizontal blank is 6.36 us or 800-640 = 160 VGA clocks.Portable Network Graphics (PNG) - 58.04 kB - 03/06/2017 at 22:27 |
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FF-Q5 FF-Q4 CLK 640ns HS front porch.pngHorizontal front porch is nicely ~640 ns, as it should be.Portable Network Graphics (PNG) - 54.17 kB - 03/06/2017 at 22:25 |
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CLK FF-D0 62ns next pixel.pngPixel throughput at 62 ns. Much faster than the expected 150+ ns.Portable Network Graphics (PNG) - 61.23 kB - 03/06/2017 at 22:21 |
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IMG_2284.jpgLogic diagramJPEG Image - 2.12 MB - 03/05/2017 at 20:20 |
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IMG_2270.jpgFrame 7: Reflected image at bottomJPEG Image - 1.85 MB - 03/04/2017 at 11:49 |
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IMG_2262.jpgProgrammer based on Mario Keller's MEEPROMMER project.JPEG Image - 2.10 MB - 03/04/2017 at 11:39 |
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IMG_2268.jpgFrame 3: Vertical color barsJPEG Image - 1.71 MB - 03/04/2017 at 11:37 |
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IMG_2269.jpgFrame 2: B/W vertical stripes test imageJPEG Image - 2.35 MB - 03/04/2017 at 11:36 |
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palette-chipper.png16 color RGBI palettePortable Network Graphics (PNG) - 376.00 bytes - 03/04/2017 at 11:26 |
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tester-Parrot-160x120.rgbImage file as RAW file created by ImageMagick from the PNG.x-rgb - 56.25 kB - 03/04/2017 at 02:41 |
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y.romContents of the 8K ROM.There are 8 frames selected by bit 10-12: 000xxxxxxxxxx: Counter control only, no VGA; 001xxxxxxxxxx: VGA H/V sync signals, no image; 010xxxxxxxxxx: Vertical stripes (black/white); 011xxxxxxxxxx: Vertical color bars; 100xxxxxxxxxx: Color blocks; 101xxxxxxxxxx: Parrot; 110xxxxxxxxxx: Parrot upside down; 111xxxxxxxxxx: Parrot with reflection rom - 8.00 kB - 03/04/2017 at 01:28 |
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x.romContents of the 32K ROM.There are 128 display lines, indexed by bit 8-14: 0: black, used during vertical blank; 1: black with VSYNC, used during vertical blank; 2-121: display lines for parrot image; 122: display line for B/W test frame; 123-126: display lines for color test frames; 127: No VGA signal rom - 32.00 kB - 03/04/2017 at 01:28 |
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mkyrom.pyPython script to create the 8K ROM contentsx-python-script - 1.29 kB - 03/04/2017 at 01:27 |
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mkxrom.pyPython script to create the 32K ROM contentsx-python-script - 1.55 kB - 03/04/2017 at 01:26 |
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tester-Parrot-160x120.pngImage file as a scaled-down and dithered PGN file. Created by ImageMagick. The source is Adrian Pingstone's public domain image at https://commons.wikimedia.org/wiki/File:Parrot.red.macaw.1.arp.750pix.jpgPortable Network Graphics (PNG) - 23.44 kB - 03/04/2017 at 01:22 |
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