File:Character generator scheme.svg

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Summary

DescriptionCharacter generator scheme.svg	English: A simple character generator, see Text mode on Wikipedia. Both scan line and dot counter binary registers are divided to high and low parts. These high parts combined serve as a character index and are passed to the text buffer (character pointer table), those output is a code point. Code point, and low parts of scan line and dot counter are indices in 1-bit three-dimensional array (ROM or RAM), representing a monospace font. Its output is a text mode video signal. The 3-bit low parts of scan line and dot counter produces a 8×8 glyph matrix, and the 5-bit character row and column indices are typical for video architectures of the ZX Spectrum, Nintendo Entertainment System, Sega Master System, and Game Boy.
Date	26 March 2010
Source	Own work
Author	Incnis Mrsi, Damian Yerrick
Permission (Reusing this file)	public domain

Licensing

I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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File history

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	Date/Time	Dimensions	User	Comment
current	23:26, 15 July 2010	512 × 200 (3 KB)	Damian Yerrick	Redrawn cleaner, with realistic numbers of address lines (which match the NES, ZX Spectrum, Game Boy family, and Nintendo DS)
	13:45, 26 March 2010	720 × 480 (3 KB)	Incnis Mrsi	slightly smaller font
	13:39, 26 March 2010	720 × 480 (3 KB)	Incnis Mrsi	scaling 10×
	13:26, 26 March 2010	720 × 480 (3 KB)	Incnis Mrsi	trying smaller font size
	13:20, 26 March 2010	720 × 480 (3 KB)	Incnis Mrsi	{{Information \|Description={{en\|1=A simple character generator, see w:Text mode. Both scan line and dot counter binary registers are divided to high and low parts. These high parts combined serve as a character index and are passed to the text buffer