guides:text_mode
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guides:text_mode [2020-05-03 05:48] omolini |
guides:text_mode [2020-05-03 06:21] 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 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: | + | Ever wondered why VGA text mode had at times, ugly looking text mode graphics? Most all VGA boards by default displayed text at a larger font glyph size of 9x16 pixels, while remaining compatible with the earlier font size at 8x14 pixels. While this added clarity to text by creating a higher resolution display, it was a compromise to keep compatibility with older hardware. The font size was increased from 14 to 16 pixels high, however the designers were unable to add an ninth column to the font. Instead, they decided to make it a blank column. In some cases, it did make sense to separate text with space to make it more readable, however it also made some text mode graphical applications look bad. 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 |}} | ||
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| {{ :guides:pics:text_mode_setup_ega_2.jpg?400 |}} | {{ :guides:pics:text_mode_setup_ega_2.jpg?400 |}} | ||
| - | {{ :guides:pics:text_mode_setup_ega_3.jpg?400 |}} | + | {{ :guides:pics:text_mode_ega_1.jpg?400 |}} |
| + | {{ :guides:pics:text_mode_ega_2.jpg?400 |}} | ||
| + | {{ :guides:pics:text_mode_ega_3.jpg?400 |}} | ||
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| + | This utility can also be handy to display ANSI art correctly, or with use with BBS's. You can also use it to switch to a nicer 40x25 column text, that mimics the original CGA adapter. | ||
| ===== Usage ===== | ===== Usage ===== | ||
guides/text_mode.txt · Last modified: 2020-08-28 23:13 by omolini
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