VGA Hardware: Difference between revisions
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Plane 2 contains the font data. For each of the 256 available characters this plane has 32 bytes reserved. Each byte represents one horizontal cross section through each character. The first byte of each group defines the top line, each next byte describes the rows below it. For every set bit, the foreground color is used, For every cleared bit, the background color is used. |
Plane 2 contains the font data. For each of the 256 available characters this plane has 32 bytes reserved. Each byte represents one horizontal cross section through each character. The first byte of each group defines the top line, each next byte describes the rows below it. For every set bit, the foreground color is used, For every cleared bit, the background color is used. |
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Although 32 bytes are reserved for each character, only 14 are commonly |
Although 32 bytes are reserved for each character, only 14 are commonly used. |
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Planes 0 and 1 are written directly from video memory. Plane 0 is accessed on even addresses, plane 1 is accessed on odd addresses, with each consecutive word describing the next character. |
Planes 0 and 1 are written directly from video memory. Plane 0 is accessed on even addresses, plane 1 is accessed on odd addresses, with each consecutive word describing the next character. |
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