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guides:text_mode [2020-05-03 05:47] omolini |
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====== Perfect Text Mode in VGA ====== | ====== Perfect Text Mode in VGA ====== | ||
- | Ever wondered why VGA text mode had at times, ugly looking graphics drawing characters? Most all VGA boards by default ran with a font glyph size of 9x16 pixels, while remaining compatible with the earlier text font at 8x14 pixels. While this added clarity to text by creating higher resolution text, it was a bodge, as the 9th row of pixels was just a duplicate of the 8th row. In some cases, it made graphical text mode applications look weird. Here's an example of what a wall of 50% gradient characters looks like in VGA: | + | Ever wondered why VGA text mode had at times, ugly looking graphics drawing characters? Most all VGA boards by default displayed text at a larger font glyph size of 9x16 pixels, while remaining compatible with the earlier text font at 8x14 pixels. While this added clarity to text by creating higher resolution text, due to the compatibility requirements, it was a botched attempt, since the 9th row of pixels was just a duplicate of the 8th row. In some cases, it made graphical text mode applications look weird. Here's an example of what a wall of 50% gradient characters looks like in VGA: |
{{ :guides:pics:text_mode_setup_vga.jpg?400 |}} | {{ :guides:pics:text_mode_setup_vga.jpg?400 |}} |