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ubb-vga/web/index.html: some changes in wording and text structure
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@ -15,11 +15,11 @@ workable VGA signal on the
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<H2>What it can do</H2>
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The video signal timing is controlled by software. Available resolutions
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include 640x480 and 800x600.
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At present, the maximum resolution is 1024x768 with a refresh rate of 50 Hz:
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<BR>
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<A href="ubb-vga-pub-1024.jpg"><IMG src="ubb-vga-pub-1024-small.jpg"></A>
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<BR>
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Other resolutions possible include 640x480 and 800x600.
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<P>
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The 16 colors are generated from a binary channel for red, green, and blue
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each, plus a binary luminance channel that affects all colors.
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@ -41,13 +41,13 @@ The pictures below show a prototype that connects directly to a VGA cable:
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<A href="ubb-vga-pub-v2.jpg"><IMG src="ubb-vga-pub-v2-small.jpg"></A>
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<P>
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The circuit is very simple. It consists of UBB itself, ten resistors,
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and the VGA cable:
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The circuit is very simple. In its simplest form, it consists of UBB,
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ten resistors, and the VGA cable:
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<BR>
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<A href="ubb-vga-schem.png"><IMG src="ubb-vga-schem-small.png"></A>
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<BR>
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Each of the three analog color channels uses three resistors for lowering
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the 3.3 V logical voltage to the 0.7 V VGA level and for mixing in the
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the 3.3 V logic voltage to the 0.7 V analog VGA level and for mixing in the
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luminance (Y) signal. The tenth resistor pulls down the HSYNC/CMD
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line, to fake the "not busy" signal the MMC controller expects to receive
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from a MMC device when starting a block write.
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